You searched for subject:(Wireless communication systems ).
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University of Johannesburg
1.
Van Rooyen, Pieter Gert Wessel.
Maximum entropy based analysis of a DS/SSMA diversity system.
Degree: 2014, University of Johannesburg
URL: http://hdl.handle.net/10210/9334 
► D.Ing.
This thesis sets out to propose and analyze a cellular Direct Sequence Spread Spectrum Multiple Access (DSjSSMA) system for the Indoor Wireless Communication (IWC)…
(more)
▼ D.Ing.
This thesis sets out to propose and analyze a cellular Direct Sequence Spread Spectrum Multiple Access (DSjSSMA) system for the Indoor Wireless Communication (IWC) Nakagami fading channel. The up- and downlink of the system implement Differential Phase Shift Keying (DPSK) and Coherent Phase Shift Keying (CPSK) as modulation schemes respectively, and are analyzed using Maximum Entropy (MaxEnt) principles due to its reliability and accuracy. As a means to enhance system capacity and performance, different forms of diversity are investigated; for the up- and downlink, respectively, RAKE reception and Maximum Ratio Combining (MRC) diversity together with Forward Error Control (FEC) coding are assumed. Further, the validity of the Gaussian Assumption (GA) is quantified and investigated under fading and non-fading conditions by calculating the missing information, using Minimum Relative Entropy (MRE) principles between the Inter- User Interference (IUI) distribution and a Gaussian distribution of equal variance.
Subjects/Keywords: Wireless communication systems
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APA (6th Edition):
Van Rooyen, P. G. W. (2014). Maximum entropy based analysis of a DS/SSMA diversity system. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/9334
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Van Rooyen, Pieter Gert Wessel. “Maximum entropy based analysis of a DS/SSMA diversity system.” 2014. Thesis, University of Johannesburg. Accessed March 01, 2021.
http://hdl.handle.net/10210/9334.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Van Rooyen, Pieter Gert Wessel. “Maximum entropy based analysis of a DS/SSMA diversity system.” 2014. Web. 01 Mar 2021.
Vancouver:
Van Rooyen PGW. Maximum entropy based analysis of a DS/SSMA diversity system. [Internet] [Thesis]. University of Johannesburg; 2014. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/10210/9334.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Van Rooyen PGW. Maximum entropy based analysis of a DS/SSMA diversity system. [Thesis]. University of Johannesburg; 2014. Available from: http://hdl.handle.net/10210/9334
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Johannesburg
2.
Swarts, Jacobus Stephanus.
Aspects of multipath channel characterization.
Degree: 2012, University of Johannesburg
URL: http://hdl.handle.net/10210/6088
► M.Ing.
In this thesis we investigated the characterization of wireless communication channels. The characterization of the channel itself focused on the analog as well as…
(more)
▼ M.Ing.
In this thesis we investigated the characterization of wireless communication channels. The characterization of the channel itself focused on the analog as well as the discrete domains. This was done to provide a more complete treatment than that which is usually found in the literature (which normally focuses" on either one of the domains). We also provide a discussion on the basic issues that arise when trying to characterize a wireless communication channel. The analog characterization proceeded by means of the impulse response of the chan nel. We calculated the scattering function of the channel as well as the Delay and Doppler Power Spectra. From the wideband data we also derived the equivalent Narrowband en velope and phase and investigated the probability density functions of these. We also implemented the GMSK modulation scheme, used in the GSM system, in software. This included a simulation of the additive white Gaussian noise channel as well as the Rayleigh fading channel, the two most common assumed models. A complete discussion is provided on this implementation. The implementation above was used to obtain discrete channel models of GMSK on a Rayleigh fading channel. This also provided us with the opportunity to compare the performance of three of the most common discrete channel models : the Gilbert model, the Gilbert-Elliott model and the Fritchman model. Lastly we obtained equations that describe the behaviour of the Gilbert model's parameters as a function of average signal to-noise ratio.
Subjects/Keywords: Wireless communication systems
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APA (6th Edition):
Swarts, J. S. (2012). Aspects of multipath channel characterization. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/6088
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Swarts, Jacobus Stephanus. “Aspects of multipath channel characterization.” 2012. Thesis, University of Johannesburg. Accessed March 01, 2021.
http://hdl.handle.net/10210/6088.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Swarts, Jacobus Stephanus. “Aspects of multipath channel characterization.” 2012. Web. 01 Mar 2021.
Vancouver:
Swarts JS. Aspects of multipath channel characterization. [Internet] [Thesis]. University of Johannesburg; 2012. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/10210/6088.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Swarts JS. Aspects of multipath channel characterization. [Thesis]. University of Johannesburg; 2012. Available from: http://hdl.handle.net/10210/6088
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Rutgers University
3.
Kulkarni, Pavan.
Design and implementation of 802.11 control API and experimental evaluation of channel selection algorithms.
Degree: MS, Electrical and Computer Engineering, 2016, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/51343/
► This thesis presents design and implementation of an HTTP based control API on top of the 802.11 software access point - hostapd and experimental evaluation…
(more)
▼ This thesis presents design and implementation of an HTTP based control API on top of the 802.11 software access point - hostapd and experimental evaluation of channel coordination algorithms using the framework developed. The hostapd cli, a front end program to interact with hostapd is modified to control the channel via HTTP interface through CSA(Channel Switch Announcement) commands. The time taken to switch the channel through this framework is studied experimentally. The API is then used to enable experimental evaluation of radio resource management algorithms running on a central controller. The control framework has been implemented on the ORBIT testbed using a set of 802.11 nodes with specified topology controlled by a logically centralized algorithm running on a server machine. The setup is used to study candidate channel assignment algorithms in terms of metrics such as total system throughput. Throughput analysis for different channel coordination algorithms was carried out using iperf to compare their performance. WiFi Automatic Channel Selection(ACS), a survey based channel selection algorithm is compared with alternative graph coloring algorithms including HSum and HMinMax and their performance is analyzed. The experimental results show that the graph coloring algorithms HSum and HMinMax perform better when compared to ACS in terms of overall system throughput. The ORBIT nodes were grouped to form two different networks and performance of inter-network and intra-network cooperation was studied by controlling the channel through a logically centralized controller. The results show increased performance of inter-network cooperation when compared to intra-network cooperation in terms of overall system throughput.
Advisors/Committee Members: Raychaudhuri, Dipankar (chair).
Subjects/Keywords: Wireless communication systems
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APA (6th Edition):
Kulkarni, P. (2016). Design and implementation of 802.11 control API and experimental evaluation of channel selection algorithms. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/51343/
Chicago Manual of Style (16th Edition):
Kulkarni, Pavan. “Design and implementation of 802.11 control API and experimental evaluation of channel selection algorithms.” 2016. Masters Thesis, Rutgers University. Accessed March 01, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/51343/.
MLA Handbook (7th Edition):
Kulkarni, Pavan. “Design and implementation of 802.11 control API and experimental evaluation of channel selection algorithms.” 2016. Web. 01 Mar 2021.
Vancouver:
Kulkarni P. Design and implementation of 802.11 control API and experimental evaluation of channel selection algorithms. [Internet] [Masters thesis]. Rutgers University; 2016. [cited 2021 Mar 01].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/51343/.
Council of Science Editors:
Kulkarni P. Design and implementation of 802.11 control API and experimental evaluation of channel selection algorithms. [Masters Thesis]. Rutgers University; 2016. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/51343/
Rutgers University
4.
Kumbhkar, Ratnesh, 1985-.
Opportunistic access of noncontiguous spectrum.
Degree: PhD, Electrical and Computer Engineering, 2018, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/56032/
► The world is getting more and more connected. Other than traditional telecommunication applications such as cellular communication and wireless broadband, many new technologies such as…
(more)
▼ The world is getting more and more connected. Other than traditional telecommunication applications such as cellular communication and wireless broadband, many new technologies such as the Internet of things (IoT) and automotive vehicles are using wireless spectrum to establish the connection to the network. With these increasing number of devices, the data rate requirements are increasing enormously, which in turn, necessitate a more efficient utilization of available resources. In an effort to enable higher productive utilization of the available spectrum, the Federal Communications Commission (FCC) has recently opened up many spectrum bands such TV white space, 3.5~GHz Citizen Broadband Radio Service (CBRS) band and 5~GHz The Unlicensed National Information Infrastructure (U-NII) band among others for commercial, unlicensed and shared access. This has led to various innovations in cognitive radio technology, coexistence mechanism among heterogeneous technologies, spectrum sensing as well as novel proposals for dynamic spectrum access. Over a large part of the last decade, there has been a tremendous amount of research on spectrum policy as well as the theory and practice of cognitive radio networks including dynamic spectrum access (DSA) algorithms, networking protocols, and software radio platform development. Generally, the available spectrum to the users in a cognitive environment is not always contiguous and becomes fragmented due to either the presence of primary users or other secondary users. In this thesis, we specifically study the opportunity and challenges associated with the access of such fragmented spectrum. This thesis first presents the problem of spectrum allocation for cases when the available spectrum is fragmented. As an example, the problem of allocating TV white-space to provide wireless backhaul communication is presented. In the second part of this thesis, the NC-OFDM based communication is introduced as a technique for agile and flexible access to a fragmented spectrum. The advantages of using NC-OFDM for spectrum allocation in a power constrained system are highlighted. In the latter part of the thesis, the challenges associated with the implementation of an NC-OFDM based communication system are discussed. Synchronization among different transmissions, and a separate control channel to enable frequency and time offset calculations are identified as two of the main challenges. The performance results are presented for an NC-OFDM-enabled asynchronous network, and solutions are provided to address this issue. A low-powered underlay channel is designed to help the NC-OFDM-enabled system in the transmission of control information, and frequency and time offset estimation. At last, a physical layer security analysis of NC-OFDM is presented for a low probability of exploitation (LPE) design.
Advisors/Committee Members: Mandayam, Narayan B. (chair), Raychaudhuri, Dipankar (internal member), Yates, Roy (internal member), Kompella, Sastry (outside member), School of Graduate Studies.
Subjects/Keywords: Wireless communication systems
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APA (6th Edition):
Kumbhkar, Ratnesh, 1. (2018). Opportunistic access of noncontiguous spectrum. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/56032/
Chicago Manual of Style (16th Edition):
Kumbhkar, Ratnesh, 1985-. “Opportunistic access of noncontiguous spectrum.” 2018. Doctoral Dissertation, Rutgers University. Accessed March 01, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/56032/.
MLA Handbook (7th Edition):
Kumbhkar, Ratnesh, 1985-. “Opportunistic access of noncontiguous spectrum.” 2018. Web. 01 Mar 2021.
Vancouver:
Kumbhkar, Ratnesh 1. Opportunistic access of noncontiguous spectrum. [Internet] [Doctoral dissertation]. Rutgers University; 2018. [cited 2021 Mar 01].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/56032/.
Council of Science Editors:
Kumbhkar, Ratnesh 1. Opportunistic access of noncontiguous spectrum. [Doctoral Dissertation]. Rutgers University; 2018. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/56032/
Rutgers University
5.
Mukherjee, Shreyasee, 1989-.
Network-assisted multihoming for emerging heterogeneous wireless access scenarios.
Degree: MS, Electrical and Computer Engineering, 2014, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/42428/
► This thesis presents a technique for enabling multihoming in the emerging heterogeneous (“hetnet”) mobile wireless access scenarios, based on the MobilityFirst Future Internet Architecture. Most…
(more)
▼ This thesis presents a technique for enabling multihoming in the emerging heterogeneous (“hetnet”) mobile
wireless access scenarios, based on the MobilityFirst Future Internet Architecture. Most mobile devices now have dual
wireless interfaces (such as Wi-Fi and LTE) and the proposed technique can use either or both to achieve significant improvements in performance and service quality. In particular, our approach shifts the burden of policy expression and data-striping from end-nodes to in-network nodes, and utilizes named object routing with GUIDs to establish multiple paths to destination mobile devices. The proposed multihoming technique uses hop-by-hop backpressure for data striping at the bifurcation router and includes a robust mechanism to reduce reordering of packets at the receive buffer. We quantify the performance gains using detailed NS3 based simulations and present results from a thorough parametric study to determine the effects of data-rate, delay and hop-count difference between multiple available paths. Finally, we show that when multiple interfaces are available, simultaneous use of both the interfaces is beneficial only under certain conditions depending on the ratio of the data-rate of the interfaces and the size of the flow.
Advisors/Committee Members: Mukherjee, Shreyasee, 1989- (author), Raychaudhuri, Dipankar (chair), Yates, Roy (internal member), Zhang, Yanyong (internal member).
Subjects/Keywords: Wireless communication systems
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APA ·
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APA (6th Edition):
Mukherjee, Shreyasee, 1. (2014). Network-assisted multihoming for emerging heterogeneous wireless access scenarios. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/42428/
Chicago Manual of Style (16th Edition):
Mukherjee, Shreyasee, 1989-. “Network-assisted multihoming for emerging heterogeneous wireless access scenarios.” 2014. Masters Thesis, Rutgers University. Accessed March 01, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/42428/.
MLA Handbook (7th Edition):
Mukherjee, Shreyasee, 1989-. “Network-assisted multihoming for emerging heterogeneous wireless access scenarios.” 2014. Web. 01 Mar 2021.
Vancouver:
Mukherjee, Shreyasee 1. Network-assisted multihoming for emerging heterogeneous wireless access scenarios. [Internet] [Masters thesis]. Rutgers University; 2014. [cited 2021 Mar 01].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/42428/.
Council of Science Editors:
Mukherjee, Shreyasee 1. Network-assisted multihoming for emerging heterogeneous wireless access scenarios. [Masters Thesis]. Rutgers University; 2014. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/42428/
6.
Pressas, Andreas.
Intelligent and bandwidth-efficient medium access control protocols for IEEE 802.11p-based Vehicular Ad hoc Networks.
Degree: PhD, 2020, University of Sussex
URL: http://sro.sussex.ac.uk/id/eprint/92210/
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.809113
► Vehicle-to-Vehicle (V2V) technology aims to enable safer and more sophisticated transportation via the spontaneous formation of Vehicular Ad hoc Networks (VANETs). This type of wireless…
(more)
▼ Vehicle-to-Vehicle (V2V) technology aims to enable safer and more sophisticated transportation via the spontaneous formation of Vehicular Ad hoc Networks (VANETs). This type of wireless networks allows the exchange of kinematic and other data among vehicles, for the primary purpose of safer and more efficient driving, as well as efficient traffic management and other third-party services. Their infrastructure-less, unbounded nature allows the formation of dense networks that present a channel sharing issue, which is harder to tackle than in conventional WLANs. This thesis focuses on optimising channel access strategies, which is important for the efficient usage of the available wireless bandwidth and the successful deployment of VANETs. To start with, the default channel access control method for V2V is evaluated hardware via modifying the appropriate wireless interface Linux driver to enable finer on-the-fly control of IEEE 802.11p access control layer parameters. More complex channel sharing scenarios are evaluated via simulations and findings on the behaviour of the access control mechanism are presented. A complete channel sharing efficiency assessment is conducted, including throughput, fairness and latency measurements. A new IEEE 802.11p-compatible Q-Learning-based access control approach that improves upon the studied protocol is presented. The stations feature algorithms that “learn” how to act optimally in VANETs in order to maximise their achieved packet delivery and minimise bandwidth wastage. The feasibility of Q-Learning to be used as the base of selflearning protocols for IEEE 802.11p-based V2V communication access control in dense environments is investigated in terms of parameter tuning, necessary time of exploration, achieving latency requirements, scaling, multi-hop and accommodation of simultaneous applications. Additionally, the novel Collection Contention Estimation (CCE) mechanism for Q-Learning-based access control is presented. By embedding it on the Q-Learning agents, faster convergence, higher throughput, better service separation and short-term fairness are achieved in simulated network deployments. The acquired new insights on the network performance of the proposed algorithms can provide precise guidelines for efficient designs of practical, reliable, fair and ultra-low latency V2V communication systems for dense topologies. These results can potentially have an impact across a range of related areas, including various types of wireless networks and resource allocation for these, network protocol and transceiver design as well as QLearning applicability and considerations for correct use.
Subjects/Keywords: TK5103.2 Wireless communication systems. Mobile communication systems
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APA ·
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APA (6th Edition):
Pressas, A. (2020). Intelligent and bandwidth-efficient medium access control protocols for IEEE 802.11p-based Vehicular Ad hoc Networks. (Doctoral Dissertation). University of Sussex. Retrieved from http://sro.sussex.ac.uk/id/eprint/92210/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.809113
Chicago Manual of Style (16th Edition):
Pressas, Andreas. “Intelligent and bandwidth-efficient medium access control protocols for IEEE 802.11p-based Vehicular Ad hoc Networks.” 2020. Doctoral Dissertation, University of Sussex. Accessed March 01, 2021.
http://sro.sussex.ac.uk/id/eprint/92210/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.809113.
MLA Handbook (7th Edition):
Pressas, Andreas. “Intelligent and bandwidth-efficient medium access control protocols for IEEE 802.11p-based Vehicular Ad hoc Networks.” 2020. Web. 01 Mar 2021.
Vancouver:
Pressas A. Intelligent and bandwidth-efficient medium access control protocols for IEEE 802.11p-based Vehicular Ad hoc Networks. [Internet] [Doctoral dissertation]. University of Sussex; 2020. [cited 2021 Mar 01].
Available from: http://sro.sussex.ac.uk/id/eprint/92210/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.809113.
Council of Science Editors:
Pressas A. Intelligent and bandwidth-efficient medium access control protocols for IEEE 802.11p-based Vehicular Ad hoc Networks. [Doctoral Dissertation]. University of Sussex; 2020. Available from: http://sro.sussex.ac.uk/id/eprint/92210/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.809113
University of Oklahoma
7.
Shahriar, Abu Zafar.
Evaluation of Network Mobility Schemes for Terrestrial and Satellite Networks.
Degree: PhD, 2012, University of Oklahoma
URL: http://hdl.handle.net/11244/319493
networks by selecting and extending optimal route optimization schemes, and presenting new architecture and protocol.
Advisors/Committee Members: Atiquzzaman, Mohammed (advisor).Subjects/Keywords: Wireless communication systems; Mobile communication systems; Telecommunication
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Shahriar, A. Z. (2012). Evaluation of Network Mobility Schemes for Terrestrial and Satellite Networks. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/319493
Chicago Manual of Style (16th Edition):
Shahriar, Abu Zafar. “Evaluation of Network Mobility Schemes for Terrestrial and Satellite Networks.” 2012. Doctoral Dissertation, University of Oklahoma. Accessed March 01, 2021.
http://hdl.handle.net/11244/319493.
MLA Handbook (7th Edition):
Shahriar, Abu Zafar. “Evaluation of Network Mobility Schemes for Terrestrial and Satellite Networks.” 2012. Web. 01 Mar 2021.
Vancouver:
Shahriar AZ. Evaluation of Network Mobility Schemes for Terrestrial and Satellite Networks. [Internet] [Doctoral dissertation]. University of Oklahoma; 2012. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/11244/319493.
Council of Science Editors:
Shahriar AZ. Evaluation of Network Mobility Schemes for Terrestrial and Satellite Networks. [Doctoral Dissertation]. University of Oklahoma; 2012. Available from: http://hdl.handle.net/11244/319493
University of Oklahoma
8.
Shahriar, Abu Zafar.
Evaluation of Network Mobility Schemes for Terrestrial and Satellite Networks.
Degree: PhD, 2012, University of Oklahoma
URL: http://hdl.handle.net/11244/318543
networks by selecting and extending optimal route optimization schemes, and presenting new architecture and protocol.
Advisors/Committee Members: Atiquzzaman, Mohammed (advisor).Subjects/Keywords: Wireless communication systems; Mobile communication systems; Telecommunication
Record Details
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Record Details
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❌
APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Shahriar, A. Z. (2012). Evaluation of Network Mobility Schemes for Terrestrial and Satellite Networks. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/318543
Chicago Manual of Style (16th Edition):
Shahriar, Abu Zafar. “Evaluation of Network Mobility Schemes for Terrestrial and Satellite Networks.” 2012. Doctoral Dissertation, University of Oklahoma. Accessed March 01, 2021.
http://hdl.handle.net/11244/318543.
MLA Handbook (7th Edition):
Shahriar, Abu Zafar. “Evaluation of Network Mobility Schemes for Terrestrial and Satellite Networks.” 2012. Web. 01 Mar 2021.
Vancouver:
Shahriar AZ. Evaluation of Network Mobility Schemes for Terrestrial and Satellite Networks. [Internet] [Doctoral dissertation]. University of Oklahoma; 2012. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/11244/318543.
Council of Science Editors:
Shahriar AZ. Evaluation of Network Mobility Schemes for Terrestrial and Satellite Networks. [Doctoral Dissertation]. University of Oklahoma; 2012. Available from: http://hdl.handle.net/11244/318543
Ryerson University
9.
Kohn, Adam.
Multi-Channel Wireless Mesh Networks With TCP Proxies.
Degree: 2010, Ryerson University
URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A2031
► Wireless mesh networks based on 802.11 technology could potentially be an inexpensive means of constructing large-scale wireless infrastructure networks. Wireless mesh networks attempt to capitalize…
(more)
▼ Wireless mesh networks based on 802.11 technology could potentially be an inexpensive means of constructing large-scale
wireless infrastructure networks.
Wireless mesh networks attempt to capitalize on multiple hop
communication to achieve transmissions over relatively larger distances. One fundamental concern is that multi-hop
wireless networks may suffer heavily from co-channel interference. If multiple channels from the 802.11 spectrum are employed across adjacent links of
communication, the interference effects can be mitigated. In practice, either overlapping channels or independent orthogonal channels can be assigned to the different links with varying effects. Topology control can be used to help manage these channels to limit the interference effects while providing for the necessary capacity and scalability requirements. By means of analyses and testbed experiments, I have validated that the introduction of multiple channels can improve overall system performance. With respect to the end-users, end-to-end performance over multiple
wireless hops should be the primary concern. Under UDP-based
communication sessions, network congestion is not the main contributor to transport layer performance degradation. Upon further investigation, TCP performance degrades exponentially with hop count, because it incorrectly interprets lost packets as a sigh of network congestion. Since TCP performance weakens for connections with more
wireless hops, I further evaluate if network performance can be improved by adding an n-hop TCP proxy service. These proxies have the effect of breaking long connections into shorter connections with tighter transport layer control. A trade-off between the number of proxies and the hop count between proxies becomes evident through testbed evaluation. Analyzing various mesh characteristics and the relationships between MAC and transport layers can help establish a suitable protocol for future work.
Advisors/Committee Members: Ryerson University (Degree grantor).
Subjects/Keywords: Wireless communication systems; Wireless communication systems – Computer simulation; Wireless communication systems – Evaluation
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APA (6th Edition):
Kohn, A. (2010). Multi-Channel Wireless Mesh Networks With TCP Proxies. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A2031
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kohn, Adam. “Multi-Channel Wireless Mesh Networks With TCP Proxies.” 2010. Thesis, Ryerson University. Accessed March 01, 2021.
https://digital.library.ryerson.ca/islandora/object/RULA%3A2031.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kohn, Adam. “Multi-Channel Wireless Mesh Networks With TCP Proxies.” 2010. Web. 01 Mar 2021.
Vancouver:
Kohn A. Multi-Channel Wireless Mesh Networks With TCP Proxies. [Internet] [Thesis]. Ryerson University; 2010. [cited 2021 Mar 01].
Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A2031.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kohn A. Multi-Channel Wireless Mesh Networks With TCP Proxies. [Thesis]. Ryerson University; 2010. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A2031
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Oregon State University
10.
Chen, Deyan.
PAPR Reduction of Optical OFDM Systems with Exponential Companding Transform and Zero Padding.
Degree: MS, Electrical and Computer Engineering, 2016, Oregon State University
URL: http://hdl.handle.net/1957/58553
► Optical wireless communication (OWC) is an alternative to radio frequency (RF)communication with a signi cantly larger and unregulated spectrum. In OWC systems, optical orthogonal frequency…
(more)
▼ Optical
wireless communication (OWC) is an alternative to radio frequency (RF)
communication with a signi cantly larger and unregulated spectrum. In OWC
systems, optical orthogonal frequency division multiplexing (O-OFDM) with intensity modulation and direct detection (IM/DD) is commonly used. There are two common signal structures in most OWC
systems based on IM/DD OFDM. One is called DC-biased optical OFDM (DCO-OFDM) and the other one is called asymmetrically clipped optical OFDM (ACO-OFDM). One drawback of an OFDM signal is its high peak-to-average power ratio (PAPR), which requires the transmitter to operate in a large dynamic range to retain all desirable information. To reduce the PAPR,companding transform has been investigated. Because of the nonlinear operation of companding, a high electrical signal-to-noise ratio (SNR) is required. In this thesis, a combination of an exponential companding transform and a zero padding scheme is employed on both DCO-OFDM and ACO-OFDM
systems to reduce PAPR and the required electrical SNR.
Systems that employ quadrature amplitude modulation (QAM) with gray mapping are simulated. Results have shown that the optimized DCO-OFDM and ACO-OFDM reduced the PAPR by about 7dB and 11dB, respectively, through exponential companding. Meanwhile, the required SNR is decreased by approximately 10dB in the optimized DCO-OFDM and by approximately 13dB in the optimized ACO-OFDM by using zero padding.
Advisors/Committee Members: Liu, Huaping (advisor), Nguyen, Thinh (committee member).
Subjects/Keywords: PAPR; Wireless communication systems
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APA (6th Edition):
Chen, D. (2016). PAPR Reduction of Optical OFDM Systems with Exponential Companding Transform and Zero Padding. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/58553
Chicago Manual of Style (16th Edition):
Chen, Deyan. “PAPR Reduction of Optical OFDM Systems with Exponential Companding Transform and Zero Padding.” 2016. Masters Thesis, Oregon State University. Accessed March 01, 2021.
http://hdl.handle.net/1957/58553.
MLA Handbook (7th Edition):
Chen, Deyan. “PAPR Reduction of Optical OFDM Systems with Exponential Companding Transform and Zero Padding.” 2016. Web. 01 Mar 2021.
Vancouver:
Chen D. PAPR Reduction of Optical OFDM Systems with Exponential Companding Transform and Zero Padding. [Internet] [Masters thesis]. Oregon State University; 2016. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/1957/58553.
Council of Science Editors:
Chen D. PAPR Reduction of Optical OFDM Systems with Exponential Companding Transform and Zero Padding. [Masters Thesis]. Oregon State University; 2016. Available from: http://hdl.handle.net/1957/58553
Stellenbosch University
11.
Kotze, Daniel Johannes Van Wyk.
Minimum congestion routing for a 17 GHz wireless ad hoc network.
Degree: Electrical and Electronic Engineering, 2011, Stellenbosch University
URL: http://hdl.handle.net/10019.1/6510
► Thesis (MScEng (Electrical and Electronic Engineering)) – University of Stellenbosch, 2011.
ENGLISH ABSTRACT: An investigation is made to find a suitable routing protocol for a millimeter…
(more)
▼ Thesis (MScEng (Electrical and Electronic Engineering)) – University of Stellenbosch, 2011.
ENGLISH ABSTRACT: An investigation is made to find a suitable routing protocol for a millimeter wave ad hoc
wireless network. It is discovered that a hierarchical routing protocol is ideal for a high
node density. Due to the high bandwidth that is possibly available, with millimeter wave
transmission, packets are used to keep links between nodes active and to control data packet
congestion. Cluster leaders are elected and use token packets to provide nodes with more
queued messages with more transmission chances, assisting the network in congestion control.
Hello messages are sent frequently to keep routing information at nodes fresh and to detect
broken links quickly. If a broken link is found a new route is readily available, within a
second. A simulation is created to test the protocol. Changes are made to the original
proactive cluster routing protocol to reduce the route length and lessen routing overhead.
A theoretical model is developed to estimate the mean waiting time for a packet. Although
insight is gained by modelling the latency with queueing theory it is suggested, due to the
protocol’s complexity, to use other mathematical modelling techniques such as a Markov
state model or a Petri net.
AFRIKAANSE OPSOMMING: Ondersoek word ingestel na ’n geskikte roete protokol vir ’n millimeter golflengte ad hoc radio
pakkie netwerk. Daar word gevind dat ’n hi¨erargiese kluster roete protokol ideaal is vir ’n
ho¨e digtheid van nodusse. As gevolg van die ho¨e bandwydte, wat moontlik beskikbaar is
met millimeter golflengte transmissie, word pakkies gebruik om kommunikasie skakels tussen
nodes in stand te hou en data pakkie verkeersopeenhoping te beheer. Kluster leiers word
verkies en gebruik teken-pakkies om nodes met ’n groter data pakkie las meer transmissie
kanse te gee. Sodoende word die verkeersopeenhoping van data pakkies verminder. Hallo
pakkies word gereeld gestuur om die roete inligting vars te hou en gebroke kommunikasie
skakels vinnig op te spoor. As ’n gebroke skakel gevind word, word ’n alternatiewe roete
vinnig opgestel, binne ’n sekonde. ’n Simulasie word opgestel om die protokol te toets.
Veranderinge aan die oorspronklike proaktiewe kluster protokol word aangebring om roete
lengte te verklein en oorhoofse roete inligting kommunikasie te verminder. ’n Teoretiese
model gebasseer op tou-staan teorie word ontwikkel om die wagtyd van ’n pakkie te bepaal.
Alhoewel, insig verkry is deur die protokol te analiseer deur middel van tou-staan teorie, word
daar voorgestel, as gevolg van die protokol se kompleksiteit, om eerder ander wiskundige
modelleeringstegnieke te gebruik soos ’n Markov toestands model of ’n Petri net.
Advisors/Committee Members: Wolhuter, R., University of Stellenbosch. Faculty of Engineering. Dept. of Electrical and Electronic Engineering..
Subjects/Keywords: Electronic engineering; Wireless communication systems
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APA (6th Edition):
Kotze, D. J. V. W. (2011). Minimum congestion routing for a 17 GHz wireless ad hoc network. (Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/6510
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kotze, Daniel Johannes Van Wyk. “Minimum congestion routing for a 17 GHz wireless ad hoc network.” 2011. Thesis, Stellenbosch University. Accessed March 01, 2021.
http://hdl.handle.net/10019.1/6510.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kotze, Daniel Johannes Van Wyk. “Minimum congestion routing for a 17 GHz wireless ad hoc network.” 2011. Web. 01 Mar 2021.
Vancouver:
Kotze DJVW. Minimum congestion routing for a 17 GHz wireless ad hoc network. [Internet] [Thesis]. Stellenbosch University; 2011. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/10019.1/6510.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kotze DJVW. Minimum congestion routing for a 17 GHz wireless ad hoc network. [Thesis]. Stellenbosch University; 2011. Available from: http://hdl.handle.net/10019.1/6510
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Oregon State University
12.
Redfield, Stephen J.
Understanding the ultra-wideband channel within a computer chassis.
Degree: MS, Electrical and Computer Engineering, 2010, Oregon State University
URL: http://hdl.handle.net/1957/16473
► Recent developments in computing technology have generated a demand for more streamlined and effective test systems. By replacing traditional in-chassis wired interconnects with a broadcast…
(more)
▼ Recent developments in computing technology have generated a demand for more streamlined and effective test
systems. By replacing traditional in-chassis wired interconnects with a broadcast
wireless system, fault detection and error susceptibility will drastically improve, input/output capabilities will expand, and routing complexity will decrease. Ultra-wideband impulse radio's (UWB-IR) characteristic multipath-immunity and free-licensed spectrum makes it ideal for use in this scenario. Understanding the unique and complex communications channel within the confines of a computer is vital to any future system implementation. A comprehensive measurement campaign is mounted with the goal of thoroughly characterizing this channel. A UWB channel model specifying channel impulse response (CIR), path loss, and fading characteristics is derived and presented in enough detail to be used as a guide for future channel modeling endeavors. Analysis of this model provides a baseline for a proof-of-concept communications system consisting of a UWB pulser and receiver, which are implemented on printed circuit board (PCB) to decrease prototyping costs. These devices are then implemented within the channel of interest to find a UWB pulse response. The pulse response measurement is a simple experiment which takes into account the pulse distortion and delay spread shortening effects of UWB antennas and in-channel radiating interference, which are not apparent in the traditional channel model. The comprehensive model is then used to determine any issues that may arise during the conversion from wired to
wireless interconnects among a computer's integrated circuits (IC).
Advisors/Committee Members: Liu, Huaping (advisor), Liu, Huaping (committee member).
Subjects/Keywords: Ultra-wideband; Wireless communication systems
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APA (6th Edition):
Redfield, S. J. (2010). Understanding the ultra-wideband channel within a computer chassis. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/16473
Chicago Manual of Style (16th Edition):
Redfield, Stephen J. “Understanding the ultra-wideband channel within a computer chassis.” 2010. Masters Thesis, Oregon State University. Accessed March 01, 2021.
http://hdl.handle.net/1957/16473.
MLA Handbook (7th Edition):
Redfield, Stephen J. “Understanding the ultra-wideband channel within a computer chassis.” 2010. Web. 01 Mar 2021.
Vancouver:
Redfield SJ. Understanding the ultra-wideband channel within a computer chassis. [Internet] [Masters thesis]. Oregon State University; 2010. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/1957/16473.
Council of Science Editors:
Redfield SJ. Understanding the ultra-wideband channel within a computer chassis. [Masters Thesis]. Oregon State University; 2010. Available from: http://hdl.handle.net/1957/16473
13.
Bukar, Ibrahim.
Spectrally efficient Non-Orthogonal Multiple Access (NOMA) techniques for future generation mobile systems.
Degree: PhD, 2017, University of Sussex
URL: http://sro.sussex.ac.uk/id/eprint/71053/
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.731209
► With the expectation of over a 1000-fold increase in the number of connected devices by 2020, efficient utilization of the limited bandwidth has become ever…
(more)
▼ With the expectation of over a 1000-fold increase in the number of connected devices by 2020, efficient utilization of the limited bandwidth has become ever more important in the design of mobile wireless systems. Furthermore, the ever-increasing demand for higher data rates has made it necessary for a new waveform design that satisfies not only throughput demands, but network capacity as well. One such technique recently proposed is the non-orthogonal multiple access (NOMA) which utilizes the distance-dependent power domain multiplexing, based on the principles of signal superposition. In this thesis, new spectrally efficient non-orthogonal signal techniques are proposed. The goal of the schemes is to allow simultaneous utilization of the same time frequency network resources. This is achieved by designing component signals in both power and phase domain such that users are precoded or preformed to form a single and uniquely decodable composite signal. The design criteria are based on maximizing either the sum rate or spectral efficiency, minimizing multi-user interference and detection ambiguity, and maximizing the minimum Euclidean distance between the composite constellation points. The design principles are applied in uplink, downlink and coordinated multipoint (CoMP) scenarios. We assume ideal channel state with perfect estimation, low mobility and synchronization scenarios so as to prove the concept and serve as a bound for any future work in non-ideal conditions. Extensive simulations and numerical analysis are carried to show the superiority and compatibility of the schemes. First, a new NOMA signal design called uplink NOMA with constellation precoding is proposed. The precoding weights are generated at the eNB based on the number of users to be superposed. The eNB signals the precoding weights to be employed by the users to adjust their transmission. The adjustments utilize the channel state information estimated from common periodic pilots broadcasted by the eNB. The weights ensure the composite received signal at the eNB belongs to the pre-known constellation. Furthermore, the users precode to the eNB antenna that requires the least total transmit power from all the users. At the eNB, joint maximum likelihood (JML) detection is employed to recover the component signals. As the composite constellation is as that of a single user transmitting that same constellation, multiple access interference can be viewed as absent, which allows multiple users to transmit at their full rates. Furthermore, the power gain achieved by the sum of the component signals maximizes the sum rate. Secondly, the constellation design principle is employed in the downlink scenario. In the scheme, called downlink NOMA with constellation preforming, the eNB preforms the users signal with power and phase weights prior to transmission. The preforming ensures multi-user interference is eliminated and the spectral efficiency maximized. The preformed composite constellation is broadcasted by the eNB which is received by all users.…
Subjects/Keywords: 620; TK5103.2 Wireless communication systems
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APA (6th Edition):
Bukar, I. (2017). Spectrally efficient Non-Orthogonal Multiple Access (NOMA) techniques for future generation mobile systems. (Doctoral Dissertation). University of Sussex. Retrieved from http://sro.sussex.ac.uk/id/eprint/71053/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.731209
Chicago Manual of Style (16th Edition):
Bukar, Ibrahim. “Spectrally efficient Non-Orthogonal Multiple Access (NOMA) techniques for future generation mobile systems.” 2017. Doctoral Dissertation, University of Sussex. Accessed March 01, 2021.
http://sro.sussex.ac.uk/id/eprint/71053/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.731209.
MLA Handbook (7th Edition):
Bukar, Ibrahim. “Spectrally efficient Non-Orthogonal Multiple Access (NOMA) techniques for future generation mobile systems.” 2017. Web. 01 Mar 2021.
Vancouver:
Bukar I. Spectrally efficient Non-Orthogonal Multiple Access (NOMA) techniques for future generation mobile systems. [Internet] [Doctoral dissertation]. University of Sussex; 2017. [cited 2021 Mar 01].
Available from: http://sro.sussex.ac.uk/id/eprint/71053/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.731209.
Council of Science Editors:
Bukar I. Spectrally efficient Non-Orthogonal Multiple Access (NOMA) techniques for future generation mobile systems. [Doctoral Dissertation]. University of Sussex; 2017. Available from: http://sro.sussex.ac.uk/id/eprint/71053/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.731209
14.
Holroyd, Patrick Michael.
A framework for the design, prototyping and evaluation of mobile interfaces for domestic environments.
Degree: PhD, 2013, University of Sussex
URL: http://sro.sussex.ac.uk/id/eprint/45101/
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.574936
► The idea of the smart home has been discussed for over three decades, but it has yet to achieve mass-market adoption. This thesis asks the…
(more)
▼ The idea of the smart home has been discussed for over three decades, but it has yet to achieve mass-market adoption. This thesis asks the question Why is my home not smart? It highlights four main areas that are barriers to adoption, and concentrates on a single one of these issues: usability. It presents an investigation that focuses on design, prototyping and evaluation of mobile interfaces for domestic environments resulting in the development of a novel framework. A smart home is the physical realisation of a ubiquitous computing system for domestic living. The research area offers numerous benefits to end-users such as convenience, assistive living, energy saving and improved security and safety. However, these benefits have yet to become accessible due to a lack of usable smart home control interfaces. This issue is considered a key reason for lack of adoption and is the focus for this thesis. Within this thesis, a framework is introduced as a novel approach for the design, prototyping and evaluation of mobile interfaces for domestic environments. Included within this framework are three components. Firstly, the Reconfigurable Multimedia Environment (RME), a physical evaluation and observation space for conducting user centred research. Secondly, Simulated Interactive Devices (SID), a video-based development and control tool for simulating interactive devices commonly found within a smart home. Thirdly, iProto, a tool that facilitates the production and rapid deployment of high fidelity prototypes for mobile touch screen devices. This framework is evaluated as a round-tripping toolchain for prototyping smart home control and found to be an efficient process for facilitating the design and evaluation of such interfaces.
Subjects/Keywords: 004; TK5103.2 Wireless communication systems
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APA (6th Edition):
Holroyd, P. M. (2013). A framework for the design, prototyping and evaluation of mobile interfaces for domestic environments. (Doctoral Dissertation). University of Sussex. Retrieved from http://sro.sussex.ac.uk/id/eprint/45101/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.574936
Chicago Manual of Style (16th Edition):
Holroyd, Patrick Michael. “A framework for the design, prototyping and evaluation of mobile interfaces for domestic environments.” 2013. Doctoral Dissertation, University of Sussex. Accessed March 01, 2021.
http://sro.sussex.ac.uk/id/eprint/45101/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.574936.
MLA Handbook (7th Edition):
Holroyd, Patrick Michael. “A framework for the design, prototyping and evaluation of mobile interfaces for domestic environments.” 2013. Web. 01 Mar 2021.
Vancouver:
Holroyd PM. A framework for the design, prototyping and evaluation of mobile interfaces for domestic environments. [Internet] [Doctoral dissertation]. University of Sussex; 2013. [cited 2021 Mar 01].
Available from: http://sro.sussex.ac.uk/id/eprint/45101/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.574936.
Council of Science Editors:
Holroyd PM. A framework for the design, prototyping and evaluation of mobile interfaces for domestic environments. [Doctoral Dissertation]. University of Sussex; 2013. Available from: http://sro.sussex.ac.uk/id/eprint/45101/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.574936
15.
Al-Eidarous, Walla.
Efficient opportunistic routing in dense mobile networks.
Degree: PhD, 2019, University of Sussex
URL: http://sro.sussex.ac.uk/id/eprint/86410/
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.786948
► The usage of smartphones is nowadays ubiquitous. Their simultaneous support for longand short-range communication has enabled the deployment of opportunistic, device-todevice networks, which exploit human…
(more)
▼ The usage of smartphones is nowadays ubiquitous. Their simultaneous support for longand short-range communication has enabled the deployment of opportunistic, device-todevice networks, which exploit human mobility to enable and facilitate communication and content exchange among peer devices. Devices connect to each other without human intervention, potentially with the assistance of the cellular network provider. The underlying network topology constantly changes, depending on the mobility patterns of the participating mobile devices. Mobile devices support various technologies for discovering their location; GPS is very accurate but it works only outdoors and is power-hungry, whereas location discovery based on nearby announced SSIDs and/or the current cell ID is less accurate but power-friendly. Indoor localisation is much more challenging; approaches that are based on inertial sensors and dead reckoning, along with deployed beacons and pre-calculated signal strength maps have been proposed. In this thesis, we develop GeoHawk, a routing protocol for dense mobile networks that support opportunistic communication and content dissemination among mobile devices in crowded events. The driving use case has been the Grand Mosque, the largest mosque in the world located at the heart of the city of Makkah in Saudi Arabia. During the Ramadan and Hajj, viii the Grand Mosque can get extremely crowded, with anticipated number of visitors close to 2.5 million, after the current expansion work is completed. The proposed protocol incorporates a novel distributed localisation technique that can be used in conjunction with the protocol, when GPS is not available. GeoHawk deals with the very high density of users/devices by heavily aggregating routing information using Bloom filters. Identifiers of mobile devices that reside within specific geographical regions are disseminated in the network in the form of Bloom filters. Said geographical regions are dynamically created and destroyed; their size evolves to reflect the uncertainty in the topology, due to mobility and potential inaccuracies of the underlying location estimation mechanism. Bloom filters are also decayed to reflect information ageing. Devices exchange routing information with their neighbours and announce aggregated information (i.e. Bloom filters) in messages that propagate towards specific directions and reach distant areas of the opportunistic network. Data is then disseminated (and replicated through a simple but efficient ticketing mechanism) towards directions where the information about the existence of the destination node is stronger. Upon reaching the best-known region for the destination node, a message is either flooded, if the belief that the node resides in the region is strong (as indicated by a belief threshold), or, in the opposite case, redirected to a randomly selected region. The distributed localisation algorithm is a novel synthesis of existing techniques, including Pedestrian Dead Reckoning, estimated location sharing and particle filtering. Our…
Subjects/Keywords: 004; TK5103.2 Wireless communication systems
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APA (6th Edition):
Al-Eidarous, W. (2019). Efficient opportunistic routing in dense mobile networks. (Doctoral Dissertation). University of Sussex. Retrieved from http://sro.sussex.ac.uk/id/eprint/86410/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.786948
Chicago Manual of Style (16th Edition):
Al-Eidarous, Walla. “Efficient opportunistic routing in dense mobile networks.” 2019. Doctoral Dissertation, University of Sussex. Accessed March 01, 2021.
http://sro.sussex.ac.uk/id/eprint/86410/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.786948.
MLA Handbook (7th Edition):
Al-Eidarous, Walla. “Efficient opportunistic routing in dense mobile networks.” 2019. Web. 01 Mar 2021.
Vancouver:
Al-Eidarous W. Efficient opportunistic routing in dense mobile networks. [Internet] [Doctoral dissertation]. University of Sussex; 2019. [cited 2021 Mar 01].
Available from: http://sro.sussex.ac.uk/id/eprint/86410/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.786948.
Council of Science Editors:
Al-Eidarous W. Efficient opportunistic routing in dense mobile networks. [Doctoral Dissertation]. University of Sussex; 2019. Available from: http://sro.sussex.ac.uk/id/eprint/86410/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.786948
16.
Aldroubi, Marwan.
Collaborative modulation multiple access for single hop and multihop networks.
Degree: PhD, 2012, University of Sussex
URL: http://sro.sussex.ac.uk/id/eprint/39645/
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.556439
► While the bandwidth available for wireless networks is limited, the world has seen an unprecedented growth in the number of mobile subscribers and an ever…
(more)
▼ While the bandwidth available for wireless networks is limited, the world has seen an unprecedented growth in the number of mobile subscribers and an ever increasing demand for high data rates. Therefore efficient utilisation of bandwidth to maximise link spectral efficiency and number of users that can be served simultaneously are primary goals in the design of wireless systems. To achieve these goals, in this thesis, a new non-orthogonal uplink multiple access scheme which combines the functionalities of adaptive modulation and multiple access called collaborative modulation multiple access (CMMA) is proposed. CMMA enables multiple users to access the network simultaneously and share the same bandwidth even when only a single receive antenna is available and in the presence of high channel correlation. Instead of competing for resources, users in CMMA share resources collaboratively by employing unique modulation sets (UMS) that differ in phase, power, and/or mapping structure. These UMS are designed to insure that the received signal formed from the superposition of all users' signals belongs to a composite QAM constellation (CC) with a rate equal to the sum rate of all users. The CC and its constituent UMSs are designed centrally at the BS to remove ambiguity, maximize the minimum Euclidian distance (dmin) of the CC and insure a minimum BER performance is maintained. Users collaboratively precode their transmitted signal by performing truncated channel inversion and phase rotation using channel state information (CSI ) obtained from a periodic common pilot to insure that their combined signal at the BS belongs to the CC known at the BS which in turn performs a simple joint maximum likelihood detection without the need for CSI. The coherent addition of users' power enables CMMA to achieve high link spectral efficiency at any time without extra power or bandwidth but on the expense of graceful degradation in BER performance. To improve the BER performance of CMMA while preserving its precoding and detection structure and without the need for pilot-aided channel estimation, a new selective diversity combining scheme called SC-CMMA is proposed. SC-CMMA optimises the overall group performance providing fairness and diversity gain for various users with different transmit powers and channel conditions by selecting a single antenna out of a group of L available antennas that minimises the total transmit power required for precoding at any one time. A detailed study of capacity and BER performance of CMMA and SC-CMMA is carried out under different level of channel correlations which shows that both offer high capacity gain and resilience to channel correlation. SC-CMMA capacity even increase with high channel correlation between users' channels. CMMA provides a practical solution for implementing the multiple access adder channel (MAAC) in fading environments hence a hybrid approach combining both collaborative coding and modulation referred to as H-CMMA is investigated. H-CMMA divides users into a number of subgroups…
Subjects/Keywords: 620; TK5103.2 Wireless communication systems
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APA (6th Edition):
Aldroubi, M. (2012). Collaborative modulation multiple access for single hop and multihop networks. (Doctoral Dissertation). University of Sussex. Retrieved from http://sro.sussex.ac.uk/id/eprint/39645/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.556439
Chicago Manual of Style (16th Edition):
Aldroubi, Marwan. “Collaborative modulation multiple access for single hop and multihop networks.” 2012. Doctoral Dissertation, University of Sussex. Accessed March 01, 2021.
http://sro.sussex.ac.uk/id/eprint/39645/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.556439.
MLA Handbook (7th Edition):
Aldroubi, Marwan. “Collaborative modulation multiple access for single hop and multihop networks.” 2012. Web. 01 Mar 2021.
Vancouver:
Aldroubi M. Collaborative modulation multiple access for single hop and multihop networks. [Internet] [Doctoral dissertation]. University of Sussex; 2012. [cited 2021 Mar 01].
Available from: http://sro.sussex.ac.uk/id/eprint/39645/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.556439.
Council of Science Editors:
Aldroubi M. Collaborative modulation multiple access for single hop and multihop networks. [Doctoral Dissertation]. University of Sussex; 2012. Available from: http://sro.sussex.ac.uk/id/eprint/39645/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.556439
17.
Lawal, Lasisi Salami.
Economically sustainable public security and emergency network exploiting a broadband communications satellite.
Degree: PhD, 2014, University of Sussex
URL: http://sro.sussex.ac.uk/id/eprint/50603/
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.629052
► The research contributes to work in Rapid Deployment of a National Public Security and Emergency Communications Network using Communication Satellite Broadband. Although studies in Public…
(more)
▼ The research contributes to work in Rapid Deployment of a National Public Security and Emergency Communications Network using Communication Satellite Broadband. Although studies in Public Security Communication networks have examined the use of communications satellite as an integral part of the Communication Infrastructure, there has not been an in-depth design analysis of an optimized regional broadband-based communication satellite in relation to the envisaged service coverage area, with little or no terrestrial last-mile telecommunications infrastructure for delivery of satellite solutions, applications and services. As such, the research provides a case study of a Nigerian Public Safety Security Communications Pilot project deployed in regions of the African continent with inadequate terrestrial last mile infrastructure and thus requiring a robust regional Communications Satellite complemented with variants of terrestrial wireless technologies to bridge the digital hiatus as a short and medium term measure apart from other strategic needs. The research not only addresses the pivotal role of a secured integrated communications Public safety network for security agencies and emergency service organizations with its potential to foster efficient information symmetry amongst their operations including during emergency and crisis management in a timely manner but demonstrates a working model of how analogue spectrum meant for Push-to-Talk (PTT) services can be re-farmed and digitalized as a “dedicated” broadband-based public communications system. The network's sustainability can be secured by using excess capacity for the strategic commercial telecommunication needs of the state and its citizens. Utilization of scarce spectrum has been deployed for Nigeria's Cashless policy pilot project for financial and digital inclusion. This effectively drives the universal access goals, without exclusivity, in a continent, which still remains the least wired in the world.
Subjects/Keywords: 620; TK5103.2 Wireless communication systems
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APA (6th Edition):
Lawal, L. S. (2014). Economically sustainable public security and emergency network exploiting a broadband communications satellite. (Doctoral Dissertation). University of Sussex. Retrieved from http://sro.sussex.ac.uk/id/eprint/50603/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.629052
Chicago Manual of Style (16th Edition):
Lawal, Lasisi Salami. “Economically sustainable public security and emergency network exploiting a broadband communications satellite.” 2014. Doctoral Dissertation, University of Sussex. Accessed March 01, 2021.
http://sro.sussex.ac.uk/id/eprint/50603/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.629052.
MLA Handbook (7th Edition):
Lawal, Lasisi Salami. “Economically sustainable public security and emergency network exploiting a broadband communications satellite.” 2014. Web. 01 Mar 2021.
Vancouver:
Lawal LS. Economically sustainable public security and emergency network exploiting a broadband communications satellite. [Internet] [Doctoral dissertation]. University of Sussex; 2014. [cited 2021 Mar 01].
Available from: http://sro.sussex.ac.uk/id/eprint/50603/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.629052.
Council of Science Editors:
Lawal LS. Economically sustainable public security and emergency network exploiting a broadband communications satellite. [Doctoral Dissertation]. University of Sussex; 2014. Available from: http://sro.sussex.ac.uk/id/eprint/50603/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.629052
18.
Hayes, T.
Routing protocols for next generation mobile wireless sensor networks.
Degree: PhD, 2016, University of Sussex
URL: http://sro.sussex.ac.uk/id/eprint/63977/
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.701608
► The recent research interest in wireless sensor networks has caused the development of many new applications and subsequently, these emerging applications have ever increasing requirements.…
(more)
▼ The recent research interest in wireless sensor networks has caused the development of many new applications and subsequently, these emerging applications have ever increasing requirements. One such requirement is that of mobility, which has inspired an entirely new array of applications in the form of mobile wireless sensor networks (MWSNs). In terms of communications, MWSNs present a challenging environment due to the high rate at which the topology may be changing. As such, the motivation of this work is to investigate potential communications solutions, in order to satisfy the performance demands of new and future MWSN applications. As such this work begins by characterising and evaluating the requirement of a large variety of these emerging applications. This thesis focuses on the area of routing, which is concerned with the reliable and timely delivery of data from multiple, mobile sensor nodes to a data sink. For this purpose the technique of gradient routing was identified as a suitable solution, since data can quickly be passed down a known gradient that is anchored at the sink. However, in a mobile network, keeping the gradient up-to-date is a key issue. This work proposes the novel use of a global time division multiple access (GTDMA) MAC as a solution to this problem, which mitigates the need for regularly flooding the network. Additionally, the concept of blind forwarding is utilised for its low overhead and high reliability through its inherent route diversity. The key contribution of this thesis is in three novel routing protocols, which use the aforementioned principles. The first protocol, PHASeR, uses a hop-count metric and encapsulates data from multiple nodes in its packets. The hop-count metric was chosen because it is simple and requires no additional hardware. The inclusion of encapsulation is intended to enable the protocol to cope with network congestion. The second protocol, LASeR, utilises location awareness to maintain a gradient and performs no encapsulation. Since many applications require location awareness, the communications systems may also take advantage of this readily available information and it can be used as a gradient metric. This protocol uses no encapsulation in order to reduce delay times. The third protocol, RASeR, uses the hop-count metric as a gradient and also does not perform encapsulation. The reduced delay time and the relaxed requirement for any existing method of location awareness makes this the most widely applicable of the three protocols. In addition to analytical expressions being derived, all three protocols are thoroughly tested through simulation. Results show the protocols to improve on the state-of-the-art and yield excellent performance over varying speeds, node numbers and data generation rates. LASeR shows the lowest overhead and delay, which comes from the advantage of having available location information. Alternatively, at the expense of increased overhead, RASeR gives comparatively high performance metrics without the need for location information.…
Subjects/Keywords: 620; TK5103.2 Wireless communication systems
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APA (6th Edition):
Hayes, T. (2016). Routing protocols for next generation mobile wireless sensor networks. (Doctoral Dissertation). University of Sussex. Retrieved from http://sro.sussex.ac.uk/id/eprint/63977/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.701608
Chicago Manual of Style (16th Edition):
Hayes, T. “Routing protocols for next generation mobile wireless sensor networks.” 2016. Doctoral Dissertation, University of Sussex. Accessed March 01, 2021.
http://sro.sussex.ac.uk/id/eprint/63977/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.701608.
MLA Handbook (7th Edition):
Hayes, T. “Routing protocols for next generation mobile wireless sensor networks.” 2016. Web. 01 Mar 2021.
Vancouver:
Hayes T. Routing protocols for next generation mobile wireless sensor networks. [Internet] [Doctoral dissertation]. University of Sussex; 2016. [cited 2021 Mar 01].
Available from: http://sro.sussex.ac.uk/id/eprint/63977/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.701608.
Council of Science Editors:
Hayes T. Routing protocols for next generation mobile wireless sensor networks. [Doctoral Dissertation]. University of Sussex; 2016. Available from: http://sro.sussex.ac.uk/id/eprint/63977/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.701608
19.
Rajaei, Aydin.
Efficient and flexible geocasting for opportunistic networks.
Degree: PhD, 2016, University of Sussex
URL: http://sro.sussex.ac.uk/id/eprint/66039/
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.701629
► With the proliferation of smartphones and their advanced connectivity capabilities, opportunistic networks have gained a lot of traction during the past years; they are suitable…
(more)
▼ With the proliferation of smartphones and their advanced connectivity capabilities, opportunistic networks have gained a lot of traction during the past years; they are suitable for increasing network capacity and sharing ephemeral, localised content. They can also offload traffic from cellular networks to device-to-device ones, when cellular networks are heavily stressed. Opportunistic networks can play a crucial role in communication scenarios where the network infrastructure is inaccessible due to natural disasters, large scale terrorist attacks or government censorship. Geocasting, where messages are destined to specific locations (casts) instead of explicitly identified devices, has a large potential in real world opportunistic networks, however it has attracted little attention in the context of opportunistic networking. In this thesis, we propose Geocasting Spray And Flood (GSAF), a simple but efficient and flexible geocasting protocol for opportunistic, delay tolerant networks. GSAF follows a simple but elegant and flexible approach where messages take random walks towards the destination cast. Messages that follow directions away from the cast are extinct when the device buffer gets full, freeing space for new messages to be delivered. In GSAF, casts do not have to be pre-defined; instead users can route messages to arbitrarily defined casts. Also, the addressed cast is flexible in comparison to other approaches and can take complex shapes in the network. DA-GSAF as the direction aware version of the GSAF is proposed as well which use location information to aid routing decisions in the GSAF. Extensive evaluation shows that GSAF and DA-GSAF are significantly more efficient than existing solutions, in terms of message delivery ratio and latency as well as network overhead.
Subjects/Keywords: 621.382; TK5103.2 Wireless communication systems
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APA (6th Edition):
Rajaei, A. (2016). Efficient and flexible geocasting for opportunistic networks. (Doctoral Dissertation). University of Sussex. Retrieved from http://sro.sussex.ac.uk/id/eprint/66039/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.701629
Chicago Manual of Style (16th Edition):
Rajaei, Aydin. “Efficient and flexible geocasting for opportunistic networks.” 2016. Doctoral Dissertation, University of Sussex. Accessed March 01, 2021.
http://sro.sussex.ac.uk/id/eprint/66039/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.701629.
MLA Handbook (7th Edition):
Rajaei, Aydin. “Efficient and flexible geocasting for opportunistic networks.” 2016. Web. 01 Mar 2021.
Vancouver:
Rajaei A. Efficient and flexible geocasting for opportunistic networks. [Internet] [Doctoral dissertation]. University of Sussex; 2016. [cited 2021 Mar 01].
Available from: http://sro.sussex.ac.uk/id/eprint/66039/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.701629.
Council of Science Editors:
Rajaei A. Efficient and flexible geocasting for opportunistic networks. [Doctoral Dissertation]. University of Sussex; 2016. Available from: http://sro.sussex.ac.uk/id/eprint/66039/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.701629
20.
Ahmed, Hafiz.
Study on the trade off between throughput and power consumption in the design of bluetooth low energy applications.
Degree: 2013, University of Tennessee – Chattanooga
URL: https://scholar.utc.edu/theses/187
► Bluetooth Low Energy (BLE) is an emerging technology that is considered a breakthrough in the field of wireless communications due to its very low power…
(more)
▼ Bluetooth Low Energy (BLE) is an emerging technology that is considered a
breakthrough in the field of
wireless communications due to its very low power consumption property. One of the issues of the current practical implementations of BLE is throughput. The theoretical throughput of BLE is around 260 Kbps but the current practical implementations have much lower throughput values. In this work, the effect of important parameters related to the BLE connection and the
Generic Attribute Profile (GATT) protocol on the
throughput and power consumption of the system has been studied based on practical
laboratory experiments.
The throughput was found to increase almost linearly with the number of
characteristics and characteristic size used in a BLE application. Additionally, the throughput
was found to have an inverse relationship with the connection interval. The average current consumed while the device is connected was found to have a proportional relationship with the number of characteristics and characteristic size and therefore the battery life of a BLE
device is greatly affected by these variables.
Understanding these results is crucial to BLE system designers and developer because it allows them to design their
systems in a way that suits their needs optimally.
Advisors/Committee Members: Eltom, Ahmed H., Sartipi, Mina, Craven, Stephen, College of Engineering and Computer Science.
Subjects/Keywords: Bluetooth technology; Wireless communication systems
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APA (6th Edition):
Ahmed, H. (2013). Study on the trade off between throughput and power consumption in the design of bluetooth low energy applications. (Masters Thesis). University of Tennessee – Chattanooga. Retrieved from https://scholar.utc.edu/theses/187
Chicago Manual of Style (16th Edition):
Ahmed, Hafiz. “Study on the trade off between throughput and power consumption in the design of bluetooth low energy applications.” 2013. Masters Thesis, University of Tennessee – Chattanooga. Accessed March 01, 2021.
https://scholar.utc.edu/theses/187.
MLA Handbook (7th Edition):
Ahmed, Hafiz. “Study on the trade off between throughput and power consumption in the design of bluetooth low energy applications.” 2013. Web. 01 Mar 2021.
Vancouver:
Ahmed H. Study on the trade off between throughput and power consumption in the design of bluetooth low energy applications. [Internet] [Masters thesis]. University of Tennessee – Chattanooga; 2013. [cited 2021 Mar 01].
Available from: https://scholar.utc.edu/theses/187.
Council of Science Editors:
Ahmed H. Study on the trade off between throughput and power consumption in the design of bluetooth low energy applications. [Masters Thesis]. University of Tennessee – Chattanooga; 2013. Available from: https://scholar.utc.edu/theses/187
University of Victoria
21.
Rahman, Md. Mizanur.
Modeling of compact antennas for wireless communication in complex environment.
Degree: Department of Electrical and Computer Engineering, 2018, University of Victoria
URL: https://dspace.library.uvic.ca//handle/1828/10064
► Demand for low-profile and compact antennas has greatly increased due to miniaturization of electronic devices. High performance for these antennas is also desired. The conflicting…
(more)
▼ Demand for low-profile and compact antennas has greatly increased due to miniaturization of electronic devices. High performance for these antennas is also desired. The conflicting nature of the requirements of high performance and compact size makes the design of these antennas challenging. The primary focus of this dissertation is to investigate and enhance the performance of various compact and low-profile antennas for
wireless communications.
Two dual band antennas for handheld telephones have been designed for the operation in AMPS and PCS bands and investigated in presence of the user's head. Antenna performance is evaluated in terms of VSWR, far-field radiation patterns, and the specific absorption rate (SAR) of energy in the user's head. A finite difference time domain (FDTD) code has been used for the modeling of antennas and user's head.
Two wide band circularly polarized patch antennas have also been analyzed using an FDTD code. A Moment Method based code (Ensemble) has been used to verify the performance of the antennas. Excitation of surface waves within the substrate of patch antennas is one of the main reasons for their low efficiency. Recently developed 2D planar photonic band gap (PBG) structures can be used to prevent the propagation of these unwanted surface waves within a particular frequency band. An analytical model has been developed for two existing PBG structures that predicts the band gaps for these structures. A new PBG structure with lower operating frequency and multiple stop bands has also been developed and modeled using the proposed analytical model. The analytical results have been compared with FDTD computed results and a good agreement has been found. Finally, a wide band circularly polarized patch has been further analyzed and integrated with a PBG structure. A significant improvement in the antenna performance is obtained with the use of PBG structure. The numerical results obtained are in excellent agreement with the measured data.
Advisors/Committee Members: Stuchly, M. A. (supervisor).
Subjects/Keywords: Antennas (Electronics); Wireless communication systems
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APA (6th Edition):
Rahman, M. M. (2018). Modeling of compact antennas for wireless communication in complex environment. (Thesis). University of Victoria. Retrieved from https://dspace.library.uvic.ca//handle/1828/10064
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Rahman, Md Mizanur. “Modeling of compact antennas for wireless communication in complex environment.” 2018. Thesis, University of Victoria. Accessed March 01, 2021.
https://dspace.library.uvic.ca//handle/1828/10064.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Rahman, Md Mizanur. “Modeling of compact antennas for wireless communication in complex environment.” 2018. Web. 01 Mar 2021.
Vancouver:
Rahman MM. Modeling of compact antennas for wireless communication in complex environment. [Internet] [Thesis]. University of Victoria; 2018. [cited 2021 Mar 01].
Available from: https://dspace.library.uvic.ca//handle/1828/10064.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Rahman MM. Modeling of compact antennas for wireless communication in complex environment. [Thesis]. University of Victoria; 2018. Available from: https://dspace.library.uvic.ca//handle/1828/10064
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Massey University
22.
Palmer, Stephen Matthew.
What is a cellphone? A tetradic odyssey : a study in media ecology.
Degree: M. Phil., Media Studies, 2011, Massey University
URL: http://hdl.handle.net/10179/2662
► This study asks the question, “What is a cellphone?” Marshall McLuhan et al. jointly devised the tetrad as a method for revealing the hidden characteristics…
(more)
▼ This study asks the question, “What is a cellphone?” Marshall McLuhan et al.
jointly devised the tetrad as a method for revealing the hidden characteristics
of any human medium or artefact. This study views a cellphone through the
tetrad’s distinctive four-dimensional non-dialectical approach. In the process,
many intriguing, surprising and even contradictory aspects come to light.
Subjects/Keywords: Media theory;
Wireless communication systems
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APA (6th Edition):
Palmer, S. M. (2011). What is a cellphone? A tetradic odyssey : a study in media ecology. (Masters Thesis). Massey University. Retrieved from http://hdl.handle.net/10179/2662
Chicago Manual of Style (16th Edition):
Palmer, Stephen Matthew. “What is a cellphone? A tetradic odyssey : a study in media ecology.” 2011. Masters Thesis, Massey University. Accessed March 01, 2021.
http://hdl.handle.net/10179/2662.
MLA Handbook (7th Edition):
Palmer, Stephen Matthew. “What is a cellphone? A tetradic odyssey : a study in media ecology.” 2011. Web. 01 Mar 2021.
Vancouver:
Palmer SM. What is a cellphone? A tetradic odyssey : a study in media ecology. [Internet] [Masters thesis]. Massey University; 2011. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/10179/2662.
Council of Science Editors:
Palmer SM. What is a cellphone? A tetradic odyssey : a study in media ecology. [Masters Thesis]. Massey University; 2011. Available from: http://hdl.handle.net/10179/2662
University of Oklahoma
23.
Zhou, Dayong.
WIRELESS OPTICAL TRANSCEIVER DESIGN, LINK ANALISYS AND ALIGNMENT CONTROL FOR MOBILE COMMUNICATION.
Degree: PhD, 2013, University of Oklahoma
URL: http://hdl.handle.net/11244/318748
► Pointing, acquisition and tracking of a free-space optical node in a mobile network experiencing misalignment due to adverse factors including vibration, motion and atmospheric turbulence…
(more)
▼ Pointing, acquisition and tracking of a free-space optical node in a mobile network experiencing misalignment due to adverse factors including vibration, motion and atmospheric turbulence requires a different approach than traditional free-space optical transceivers. A recent fiber-bundle approach for beam steering at the transmitter was investigated to provide continuous beam coverage at the receiver without the application of mechanical devices. Utilizing multiple fibers-lenses sets at the receiver was also proposed to enhance the tolerance of optical link misalignment. In this work, both laboratory experiments and software simulation were implemented to evaluate the optical link performance for different fiber-bundle-based transceiver setups as the link parameters were varied. The performance was evaluated in terms of the coverage area at the receiver, which is a measure of misalignment tolerance and is dependent not only on wavelength but on other key parameters such as link length, transmitted power, the pattern of transmitters, beam divergence, and the receiver construction. The results showed that fiber-bindle-based transceivers reveal significant potential to maximize the up time of the link, and the results also provide guidance on the further development of the overall system. To incorporate the proposed transceiver designs, an alignment control system was developed and evaluated as well. The laboratory results show that the optical control system successfully recovered and maintained the link while the receiver was in motion and the signal coverage at the target area was enhanced significantly.
Advisors/Committee Members: Refai, Hazem H.||LoPresti, Peter G. (advisor).
Subjects/Keywords: Optical communications; Wireless communication systems
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APA (6th Edition):
Zhou, D. (2013). WIRELESS OPTICAL TRANSCEIVER DESIGN, LINK ANALISYS AND ALIGNMENT CONTROL FOR MOBILE COMMUNICATION. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/318748
Chicago Manual of Style (16th Edition):
Zhou, Dayong. “WIRELESS OPTICAL TRANSCEIVER DESIGN, LINK ANALISYS AND ALIGNMENT CONTROL FOR MOBILE COMMUNICATION.” 2013. Doctoral Dissertation, University of Oklahoma. Accessed March 01, 2021.
http://hdl.handle.net/11244/318748.
MLA Handbook (7th Edition):
Zhou, Dayong. “WIRELESS OPTICAL TRANSCEIVER DESIGN, LINK ANALISYS AND ALIGNMENT CONTROL FOR MOBILE COMMUNICATION.” 2013. Web. 01 Mar 2021.
Vancouver:
Zhou D. WIRELESS OPTICAL TRANSCEIVER DESIGN, LINK ANALISYS AND ALIGNMENT CONTROL FOR MOBILE COMMUNICATION. [Internet] [Doctoral dissertation]. University of Oklahoma; 2013. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/11244/318748.
Council of Science Editors:
Zhou D. WIRELESS OPTICAL TRANSCEIVER DESIGN, LINK ANALISYS AND ALIGNMENT CONTROL FOR MOBILE COMMUNICATION. [Doctoral Dissertation]. University of Oklahoma; 2013. Available from: http://hdl.handle.net/11244/318748
Rutgers University
24.
Mhaske, Swapnil.
High-throughput FPGA QC-LDPC decoder architecture for 5G wireless.
Degree: MS, Electrical and Computer Engineering, 2015, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/48610/
► Wireless data traffic is expected to increase by a 1000 fold by the year 2020 with more than 50 billion devices connected to these wireless…
(more)
▼ Wireless data traffic is expected to increase by a 1000 fold by the year 2020 with more than 50 billion devices connected to these
wireless networks with peak data rates upto 10 Gb/s. The next generation of
wireless cellular technology (being collectively termed as 5G) is slated to operate in the mm-wave (30-300GHz) spectrum which comes with challenges such as, reliance on line of sight (LOS)
communication, short range of
communication, increased shadowing and, rapid fading in time. This will necessitate additional signal processing techniques such as large antenna arrays and beamsteering which will further reduce the processing budget available to the channel coding system. In an effort ort to design and develop a channel coding solution suitable to such
systems, in this thesis we propose strategies to achieve a high-throughput FPGA-based decoder architecture for a QC-LDPC code based on circulant-1 identity matrix construction. We present a novel representation of the parity-check matrix (PCM) providing a multifold throughput gain. Splitting of the node processing algorithm enables us to achieve pipelining of blocks and hence layers. By partitioning the PCM into not only layers but superlayers, we derive an upper bound on the pipelining depth with respect to the size of the superlayer for the compact representation. To validate the architecture, a decoder for the IEEE 802.11n (2012) QC-LDPC is implemented on the Xilinx Kintex-7 FPGA with the help of the FPGA IP compiler available in the NI LabVIEW
Communication System Design Suite (CSDS). It off ers an automated and systematic compilation flow. An optimized hardware implementation from the decoder algorithm was generated in approximately 3 minutes, achieving an overall throughput of 608Mb/s (at 260MHz). With little or no modi fications, the proposed decoder architecture caters to a wide range of circulant-1 identity matrix construction based QC-LDPC codes widely accepted in several
communication and data storage standards.
Advisors/Committee Members: Spasojevic, Predrag (chair), Yates, Roy (internal member), Gajic, Zoran (internal member).
Subjects/Keywords: Modulation (Electronics); Wireless communication systems
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APA (6th Edition):
Mhaske, S. (2015). High-throughput FPGA QC-LDPC decoder architecture for 5G wireless. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/48610/
Chicago Manual of Style (16th Edition):
Mhaske, Swapnil. “High-throughput FPGA QC-LDPC decoder architecture for 5G wireless.” 2015. Masters Thesis, Rutgers University. Accessed March 01, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/48610/.
MLA Handbook (7th Edition):
Mhaske, Swapnil. “High-throughput FPGA QC-LDPC decoder architecture for 5G wireless.” 2015. Web. 01 Mar 2021.
Vancouver:
Mhaske S. High-throughput FPGA QC-LDPC decoder architecture for 5G wireless. [Internet] [Masters thesis]. Rutgers University; 2015. [cited 2021 Mar 01].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/48610/.
Council of Science Editors:
Mhaske S. High-throughput FPGA QC-LDPC decoder architecture for 5G wireless. [Masters Thesis]. Rutgers University; 2015. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/48610/
Rutgers University
25.
Tran, Tuyen X., 1988-.
Collaborative communications, caching, and computing for cloud-assisted 5G wireless networks.
Degree: PhD, Electrical and Computer Engineering, 2018, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/57732/
► Over the last few years, the proliferation of data-intensive applications on mobile devices has contributed to the overwhelming mobile traffic volume that is pushing against…
(more)
▼ Over the last few years, the proliferation of data-intensive applications on mobile devices has contributed to the overwhelming mobile traffic volume that is pushing against the boundary of the current
communication networks' capacity. Additionally, the rapidly growing popularity of computation-intensive and latency-sensitive mobile services has placed severe demands on cloud infrastructures and
wireless access networks such as ultra-low latency, user experience continuity, and high reliability. To keep up with these surging demands, network operators have to spend enormous efforts to improve users' experience while maintaining healthy revenue growth. While several solutions have been proposed to improve network capacity such as the deployment of ultra-dense small cells and massive antenna arrays as well as the utilization of millimeter wave spectrum bands, these approaches are fundamentally constrained by the limited spectrum resources, inter-cell interference, and control signaling overheads. Therefore, in order to support the foreseen massive demands from data- and computation-hungry users in the upcoming Fifth Generation (5G) of
wireless systems in an affordable way, improving network capacity alone is not sufficient and has to be accompanied by innovations at higher layers. To overcome the limitations of current connection-centric Radio Access Networks (RANs), cloud-assisted
wireless networks are promising solutions that unite
wireless networks and cloud-computing to deliver cloud services directly from the network edges. The two emerging paradigms for cloud-assisted
wireless networks are Cloud Radio Access Network (C-RAN), which aims at the centralization of base station (BS) functionalities via network virtualization and optical fronthaul technologies, and Mobile-Edge Computing (MEC), which proposes to empower the network edge by providing computing, storage, and networking resources within the edge of the mobile RAN. These two paradigms are complementary and have unique justifications within the 5G ecosystem: the centralized nature of C-RAN provides higher degree of cooperation in the network to address the capacity fluctuation and to increase the spectral and energy efficiency; on the other hand, the MEC paradigm is useful in reducing service latency and improving localized user experience. The goal of this research is to leverage the emerging C-RAN and MEC paradigms to design disruptive innovations for the
wireless access network that always make best use of the resources available to satisfy service requests from the users. To this end, novel cooperative frameworks are proposed to make optimized decisions for communications, caching, and computation in 5G
wireless systems. The proposed innovative solutions include: (i) a joint user-centric radio clustering and beamforming scheme that maximizes the downlink sum throughput of a C-RAN system, (ii) a cooperative hierarchical caching framework that aims at minimizing the network cost of content delivery and at improving users' Quality of Experience (QoE)…
Advisors/Committee Members: Pompili, Dario (chair), Gajic, Zoran (internal member), Soljanin, Emina (internal member), Yue, Guosen (outside member), School of Graduate Studies.
Subjects/Keywords: Wireless communication systems; Cloud computing
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APA (6th Edition):
Tran, Tuyen X., 1. (2018). Collaborative communications, caching, and computing for cloud-assisted 5G wireless networks. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/57732/
Chicago Manual of Style (16th Edition):
Tran, Tuyen X., 1988-. “Collaborative communications, caching, and computing for cloud-assisted 5G wireless networks.” 2018. Doctoral Dissertation, Rutgers University. Accessed March 01, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/57732/.
MLA Handbook (7th Edition):
Tran, Tuyen X., 1988-. “Collaborative communications, caching, and computing for cloud-assisted 5G wireless networks.” 2018. Web. 01 Mar 2021.
Vancouver:
Tran, Tuyen X. 1. Collaborative communications, caching, and computing for cloud-assisted 5G wireless networks. [Internet] [Doctoral dissertation]. Rutgers University; 2018. [cited 2021 Mar 01].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/57732/.
Council of Science Editors:
Tran, Tuyen X. 1. Collaborative communications, caching, and computing for cloud-assisted 5G wireless networks. [Doctoral Dissertation]. Rutgers University; 2018. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/57732/
Oregon State University
26.
Yildirim, Ferhat (Ahmet Ferhat).
Directional 60 GHz communication networks.
Degree: PhD, Electical and Computer Engineering, 2009, Oregon State University
URL: http://hdl.handle.net/1957/12844
► It is well known that multipath effects cause inter-symbol interference (ISI) for high-speed signaling and ultimately limit the achievable data rate at any frequency band.…
(more)
▼ It is well known that multipath effects cause inter-symbol interference (ISI) for high-speed signaling and ultimately limit the achievable data rate at any frequency band. In this thesis, we study several different methods to tackle this issue and provide solutions for establishing efficient
wireless links that can provide several Gbps data rate. Specifically, we show that proper choice of polarization, when used with the proposed topology detection algorithm reduces the multipath in 60 GHz
wireless channel and increases the error-performance of the network. We also develop a direction-detection algorithm for directional communications in 60 GHz, which is proven to be effective in reducing multipath and increasing spatial diversity. Finally, we propose a double directional channel model for 60 GHz channel as a modification to IEEE 802.15.3c channel model to include the effects of directional antennas both on the transmitter and the receiver side.
Advisors/Committee Members: Liu, Huaping (advisor), Magana, Mario (committee member).
Subjects/Keywords: Wireless communications; Wireless communication systems – Mathematical models
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APA (6th Edition):
Yildirim, F. (. F. (2009). Directional 60 GHz communication networks. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/12844
Chicago Manual of Style (16th Edition):
Yildirim, Ferhat (Ahmet Ferhat). “Directional 60 GHz communication networks.” 2009. Doctoral Dissertation, Oregon State University. Accessed March 01, 2021.
http://hdl.handle.net/1957/12844.
MLA Handbook (7th Edition):
Yildirim, Ferhat (Ahmet Ferhat). “Directional 60 GHz communication networks.” 2009. Web. 01 Mar 2021.
Vancouver:
Yildirim F(F. Directional 60 GHz communication networks. [Internet] [Doctoral dissertation]. Oregon State University; 2009. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/1957/12844.
Council of Science Editors:
Yildirim F(F. Directional 60 GHz communication networks. [Doctoral Dissertation]. Oregon State University; 2009. Available from: http://hdl.handle.net/1957/12844
Hong Kong University of Science and Technology
27.
Li, Haochao.
Towards efficient communication in WLANs based on cross-layer design.
Degree: 2014, Hong Kong University of Science and Technology
URL: http://repository.ust.hk/ir/Record/1783.1-63071
;
https://doi.org/10.14711/thesis-b1301520
;
http://repository.ust.hk/ir/bitstream/1783.1-63071/1/th_redirect.html
► Wireless communication is becoming an indispensable part of people’s daily life. Over the last decade, the widespread adoption of Wireless Local Area Networks (WLAN) has…
(more)
▼ Wireless communication is becoming an indispensable part of people’s daily life. Over the last decade, the widespread adoption of Wireless Local Area Networks (WLAN) has triggered the proliferation of mobile devices, resulting in a dramatic growth in the amount of the mobile data traffic. To complement this growth in demand, there has been a steady advancement of the data rate in recent years. However, the high theoretical data rate often sustains a low actual throughput in the real world transmissions, referred as a low efficiency problem in wireless communication. Therefore, it is essential to achieve efficient communication in the wireless design. In traditional WLANs with point-to-point communication, the low efficiency problem is mainly induced by the coordination overhead. To avoid radio interference and packet collisions, coordination is required to allow multiple access in the multi-station WLANs. But the existing coordination schemes themselves account for too much of the transmission air time by exchanging control messages, resulting in a significant control overhead. This motivates us to provide a cost-effective coordination scheme in the wireless transmission. To achieve this, we propose a cross layer design, named hJam, for OFDM-based WLANs. Rather than interleaving or separating the control messages and data traffic as the traditional communication paradigms, hJam serves them together at the same time. By exploiting the redundancy in the preamble, the control messages are able to be transmitted in an attached manner with the data traffic. Therefore, hJam eliminates the control overhead by enabling the concurrent transmission of coordination message and traffic data to improve the coordination efficiency. Through extensive experiments, we have demonstrated the significant improvement of channel efficiency based on the design of hJam. In recent years, the emerging Multi-User Multiple-Input-Multiple-Output (MU-MIMO) has also attracted attention in wireless communication by allowing the concurrent transmissions among multiple transmitters to the same receiver. The traditional approaches only focus on the efficiency in the time domain by reducing the control overhead. Differently, the channel efficiency problem becomes even more challenging in MU-MIMO networks by introducing an extra dimension, i.e., spatial domain, for the concurrent transmission for multiple nodes. Through analysis, we investigate that it is crucial to utilize the antenna usage by ensuring as many as possible simultaneous streams sent to the AP in MU-MIMO networks. Therefore, channel utilization in MU-MIMO networks should consider both the time and spatial domain, i.e., the efficient channel time and antenna usage at AP. To achieve this, we propose a new MAC-PHY design, named CUTS, by using interference nulling for attaching the antenna information in frequency domain channel contention, combined with the technique ACK in the frequency domain using self-jamming. We have validated and proven the effectiveness on channel efficiency by using…
Subjects/Keywords: Wireless communication systems
; Wireless LANs
; Quality control
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APA ·
Chicago ·
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APA (6th Edition):
Li, H. (2014). Towards efficient communication in WLANs based on cross-layer design. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-63071 ; https://doi.org/10.14711/thesis-b1301520 ; http://repository.ust.hk/ir/bitstream/1783.1-63071/1/th_redirect.html
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Li, Haochao. “Towards efficient communication in WLANs based on cross-layer design.” 2014. Thesis, Hong Kong University of Science and Technology. Accessed March 01, 2021.
http://repository.ust.hk/ir/Record/1783.1-63071 ; https://doi.org/10.14711/thesis-b1301520 ; http://repository.ust.hk/ir/bitstream/1783.1-63071/1/th_redirect.html.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Li, Haochao. “Towards efficient communication in WLANs based on cross-layer design.” 2014. Web. 01 Mar 2021.
Vancouver:
Li H. Towards efficient communication in WLANs based on cross-layer design. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2014. [cited 2021 Mar 01].
Available from: http://repository.ust.hk/ir/Record/1783.1-63071 ; https://doi.org/10.14711/thesis-b1301520 ; http://repository.ust.hk/ir/bitstream/1783.1-63071/1/th_redirect.html.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Li H. Towards efficient communication in WLANs based on cross-layer design. [Thesis]. Hong Kong University of Science and Technology; 2014. Available from: http://repository.ust.hk/ir/Record/1783.1-63071 ; https://doi.org/10.14711/thesis-b1301520 ; http://repository.ust.hk/ir/bitstream/1783.1-63071/1/th_redirect.html
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Hong Kong University of Science and Technology
28.
Shangguan, Longfei.
Location-awareness sensing for smartphone.
Degree: 2013, Hong Kong University of Science and Technology
URL: http://repository.ust.hk/ir/Record/1783.1-62337
;
https://doi.org/10.14711/thesis-b1252006
;
http://repository.ust.hk/ir/bitstream/1783.1-62337/1/th_redirect.html
► Location-awareness sensing is getting increasingly important for a range of mobile and pervasive applications on nowadays smartphones. In its basic form, location-awareness sensing refers to…
(more)
▼ Location-awareness sensing is getting increasingly important for a range of mobile and pervasive applications on nowadays smartphones. In its basic form, location-awareness sensing refers to a computing technology that incorporates information about the current environment of a mobile user to provide more relevant services to the users. This dissertation addresses two key issues that emerge from real location-awareness applications, namely object localization and micro-environment sensing from the perspective of human-centric context and device-centric perception, respectively. We explore built-in sensors on off-the-shelf handhold devices to perceive such ambient context and design two location-awareness sensing platforms: CamLoc and Sherlock. CamLoc leverages phone sensors such as accelerometer and gyroscope, together with camera to localize remote object, while Sherlock employs the calibration of various functional sensors on smartphone to perceive immediate surroundings of smartphones at centimeter level accuracy. Through long-term evaluations and real-world case studies, we verify the viability and effectiveness of the proposed systems.
Subjects/Keywords: Wireless localization
; Smartphones
; Wireless communication systems
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APA ·
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Export
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APA (6th Edition):
Shangguan, L. (2013). Location-awareness sensing for smartphone. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-62337 ; https://doi.org/10.14711/thesis-b1252006 ; http://repository.ust.hk/ir/bitstream/1783.1-62337/1/th_redirect.html
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Shangguan, Longfei. “Location-awareness sensing for smartphone.” 2013. Thesis, Hong Kong University of Science and Technology. Accessed March 01, 2021.
http://repository.ust.hk/ir/Record/1783.1-62337 ; https://doi.org/10.14711/thesis-b1252006 ; http://repository.ust.hk/ir/bitstream/1783.1-62337/1/th_redirect.html.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Shangguan, Longfei. “Location-awareness sensing for smartphone.” 2013. Web. 01 Mar 2021.
Vancouver:
Shangguan L. Location-awareness sensing for smartphone. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2013. [cited 2021 Mar 01].
Available from: http://repository.ust.hk/ir/Record/1783.1-62337 ; https://doi.org/10.14711/thesis-b1252006 ; http://repository.ust.hk/ir/bitstream/1783.1-62337/1/th_redirect.html.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Shangguan L. Location-awareness sensing for smartphone. [Thesis]. Hong Kong University of Science and Technology; 2013. Available from: http://repository.ust.hk/ir/Record/1783.1-62337 ; https://doi.org/10.14711/thesis-b1252006 ; http://repository.ust.hk/ir/bitstream/1783.1-62337/1/th_redirect.html
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Hong Kong University of Science and Technology
29.
Li, Haochao.
Performance enhancement by using PHY layer information in wireless networks.
Degree: 2011, Hong Kong University of Science and Technology
URL: http://repository.ust.hk/ir/Record/1783.1-7392
;
https://doi.org/10.14711/thesis-b1154830
;
http://repository.ust.hk/ir/bitstream/1783.1-7392/1/th_redirect.html
► In recent years, the increasing demand for mobility over the world has caused a proliferation of using wireless network. Though the current wireless technologies have…
(more)
▼ In recent years, the increasing demand for mobility over the world has caused a proliferation of using wireless network. Though the current wireless technologies have been developed rapidly, the intrinsic characteristics of wireless communication itself have largely limited its development in the near future. The interference caused by wireless’s broadcast nature and its fragility due to the environment changes limit the transmission capacity and quality of today’s wireless network. Thus accurately determining an instant wireless link quality is essential for most protocol and application designs and becomes a big challenge for the further development in wireless communications. In previous studies, packet-level metrics are utilized to reflect the link quality, e.g., Packet Reception Rate (PRR). In practice, however, these metrics exhibit many limitations and could be misleading without regarding the dynamics in wireless. Motivated by this, I propose to use more fine-grained information from the physical layer for link quality estimation purpose. Further inspired by the idea in Side Channel, the designated interference patterns retrieved from physical layer can be used for encoding extra information without degrading the effective throughput of the original transmission. However, this idea is currently only based on the coding redundancy in Direct Sequence Spread Spectrum (DSSS). In order to realize it in a more general scheme, i.e., OFDM-based WLANs, I then propose a new communication model, hJam that explores the physical layer information in an entirely different way. In hJam, the control messages in a multiple-user wireless network will be “attached” to the normal data transmission. hJam is implemented on the GNU Radio testbed consisting of eight USRP2 nodes. My comprehensive simulations and the experimental results show that hJam can improve the WLANs efficiency by up to 200% compared with the existing 802.11 family protocols.
Subjects/Keywords: Wireless communication systems
; Wireless LANs – Quality control
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APA ·
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CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Li, H. (2011). Performance enhancement by using PHY layer information in wireless networks. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-7392 ; https://doi.org/10.14711/thesis-b1154830 ; http://repository.ust.hk/ir/bitstream/1783.1-7392/1/th_redirect.html
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Li, Haochao. “Performance enhancement by using PHY layer information in wireless networks.” 2011. Thesis, Hong Kong University of Science and Technology. Accessed March 01, 2021.
http://repository.ust.hk/ir/Record/1783.1-7392 ; https://doi.org/10.14711/thesis-b1154830 ; http://repository.ust.hk/ir/bitstream/1783.1-7392/1/th_redirect.html.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Li, Haochao. “Performance enhancement by using PHY layer information in wireless networks.” 2011. Web. 01 Mar 2021.
Vancouver:
Li H. Performance enhancement by using PHY layer information in wireless networks. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2011. [cited 2021 Mar 01].
Available from: http://repository.ust.hk/ir/Record/1783.1-7392 ; https://doi.org/10.14711/thesis-b1154830 ; http://repository.ust.hk/ir/bitstream/1783.1-7392/1/th_redirect.html.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Li H. Performance enhancement by using PHY layer information in wireless networks. [Thesis]. Hong Kong University of Science and Technology; 2011. Available from: http://repository.ust.hk/ir/Record/1783.1-7392 ; https://doi.org/10.14711/thesis-b1154830 ; http://repository.ust.hk/ir/bitstream/1783.1-7392/1/th_redirect.html
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of New Mexico
30.
Buckley, Timothy.
Wireless communication system for data transfer and wireless power transmission.
Degree: Electrical and Computer Engineering, 2015, University of New Mexico
URL: http://hdl.handle.net/1928/30488
► Powering wireless communication devices remotely is necessary when a user of the communication device has limited access to battery power or the resources necessary to…
(more)
▼ Powering
wireless communication devices remotely is necessary when a user of the
communication device has limited access to battery power or the resources necessary to constantly replace the batteries. This research is focused on remotely charging a
communication device by using the power of the received signals at each antenna to dictate whether the system operates as a data transfer
communication system or rectification device. The proposed
communication system functions as a rectenna when the difference in power of the received signals is appreciable or as data transfer system when the received power is negligible. The WRCS system is also capable of harvesting energy that impinges the
communication system. The size of the
wireless communication system is designed based on the physical dimensions of the rectifier, the rectifiers impedance, as well as the operating frequency of the data transfer system. The overall objective is to maximize the power transferred to the system for storage while still being to operate effectively using the corresponding modulation system.'
Advisors/Committee Members: Christodoulou, Christos, Christodoulou, Christos, Gilmore, Mark, Tawk, Youssef, Walsh, Steve.
Subjects/Keywords: Wireless power transmission.; Wireless communication systems.
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APA ·
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Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Buckley, T. (2015). Wireless communication system for data transfer and wireless power transmission. (Doctoral Dissertation). University of New Mexico. Retrieved from http://hdl.handle.net/1928/30488
Chicago Manual of Style (16th Edition):
Buckley, Timothy. “Wireless communication system for data transfer and wireless power transmission.” 2015. Doctoral Dissertation, University of New Mexico. Accessed March 01, 2021.
http://hdl.handle.net/1928/30488.
MLA Handbook (7th Edition):
Buckley, Timothy. “Wireless communication system for data transfer and wireless power transmission.” 2015. Web. 01 Mar 2021.
Vancouver:
Buckley T. Wireless communication system for data transfer and wireless power transmission. [Internet] [Doctoral dissertation]. University of New Mexico; 2015. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/1928/30488.
Council of Science Editors:
Buckley T. Wireless communication system for data transfer and wireless power transmission. [Doctoral Dissertation]. University of New Mexico; 2015. Available from: http://hdl.handle.net/1928/30488
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