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1.
Selvakumar C.
Identification and control of Multivariable systems role
of Relay feedback;.
Degree: Identification and control of Multivariable systems
role of Relay feedback, 2014, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/26445 
► Most of the industrial processes are of multivariable in nature The newlineMulti input multi output systems have drawn attention to research due to newlineincrease in…
(more)
▼ Most of the industrial processes are of
multivariable in nature The newlineMulti input multi output systems
have drawn attention to research due to newlineincrease in
complexity and interactions between input and outputs Such
newlineprocesses are found in process industries as they arise from
the design of newlineplants that are subject to cutting edge rigid
product quality specifications are newlinemore energy efficient
have more material integration, and have better
newlineenvironmental performance newlineIncrease in complexity due
to interaction in the system has newlinedemanded better
understanding of the process in order to design a suitable
newlinecontroller for safe operation of these processes newline
newline
appendix p144-147, reference
p148-154.
Advisors/Committee Members: Panda R C.
Subjects/Keywords: Multi input multi output; Relay feedback
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APA (6th Edition):
C, S. (2014). Identification and control of Multivariable systems role
of Relay feedback;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/26445
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):
C, Selvakumar. “Identification and control of Multivariable systems role
of Relay feedback;.” 2014. Thesis, Anna University. Accessed January 22, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/26445.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
C, Selvakumar. “Identification and control of Multivariable systems role
of Relay feedback;.” 2014. Web. 22 Jan 2021.
Vancouver:
C S. Identification and control of Multivariable systems role
of Relay feedback;. [Internet] [Thesis]. Anna University; 2014. [cited 2021 Jan 22].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/26445.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
C S. Identification and control of Multivariable systems role
of Relay feedback;. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/26445
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Anna University
2.
Prem kumar M.
Channel estimation and performance analysis for amplify
and forward wireless relay networks;.
Degree: Channel estimation and performance analysis for
amplify and forward wireless relay networks, 2014, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/24099
► The significant requirements of wireless networks are high spectral efficiency link reliability and extended coverage Multiple Input Multiple Output technology meets all these requirements as…
(more)
▼ The significant requirements of wireless networks
are high spectral efficiency link reliability and extended coverage
Multiple Input Multiple Output technology meets all these
requirements as it combats fading and interference As the size
constraint of the mobile terminals imposes a restriction on the
number of antenna to be placed on them the concept of relays is
introduced in wireless networks for extended coverage and link
newlinereliability The principle of Wireless Relay Network
comprises of two phases namely phase I and phase II In phase I the
source node transmits an information signal to relay node through a
broadcast channel The relay node receives the signal and applies
Amplify and Forward relaying strategy which uses limited power and
spectral resources to improve the coverage In phase II the
processed signal is forwarded towards the destination node This
thesis mathematically portrays performance of WRN employing AF
relaying strategy by considering the channel estimation as a
significant issue and newlineergodic capacity and Bit Error Rate as
prime performance metrics In AFWRN Channel State Information is
estimated at the destination node Many algorithms have been
reported for channel estimation in AFWRN But most of the methods
are based on Least Squares and Minimum Mean Square Error which
reduce the mean square error to a significant extent but does not
result in minimal variance Further the complexity of MMSE estimator
increases exponentially as the number of samples grow In this
thesis a Best Linear Unbiased Estimator based channel estimation
algorithm is proposed for AFWRN Analytical expression for the MSE
of the proposed algorithm and Cramer Rao Lower Bound are derived
The simulation and theoretical results show better MSE
newlineperformance than LS and MMSE estimators Further the proposed
algorithm is also extended to AFWRN which employs multiple antennas
at source relay and destination nodes It is proven by theoretical
MSE derivation and simulation that the proposed algorithm shows
better MSE performance than the traditional LS and MMSE estimators
newline newline
References p.160-171
Advisors/Committee Members: Thiruvengadam S J.
Subjects/Keywords: Information and communication engineering; Multiple Input Multiple Output; Wireless networks; Wireless Relay Network
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APA (6th Edition):
M, P. k. (2014). Channel estimation and performance analysis for amplify
and forward wireless relay networks;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/24099
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):
M, Prem kumar. “Channel estimation and performance analysis for amplify
and forward wireless relay networks;.” 2014. Thesis, Anna University. Accessed January 22, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/24099.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
M, Prem kumar. “Channel estimation and performance analysis for amplify
and forward wireless relay networks;.” 2014. Web. 22 Jan 2021.
Vancouver:
M Pk. Channel estimation and performance analysis for amplify
and forward wireless relay networks;. [Internet] [Thesis]. Anna University; 2014. [cited 2021 Jan 22].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/24099.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
M Pk. Channel estimation and performance analysis for amplify
and forward wireless relay networks;. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/24099
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of New South Wales
3.
Huang, Mengyu.
Physical-layer network coding for multiple-input multiple-output relay networks.
Degree: Electrical Engineering & Telecommunications, 2016, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/56657
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:41124/SOURCE02?view=true
► Physical-layer network coding (PNC) has attracted much attention in the past decade. The intuitive idea behind PNC is to exploit the network coding operation that…
(more)
▼ Physical-layer network coding (PNC) has attracted much attention in the past decade. The intuitive idea behind PNC is to exploit the network coding operation that occurs naturally in superimposed electromagnetic waves. In a two-way
relay channel (TWRC), where two users exchange messages with the assistance of a
relay, the PNC strategy can harness the interference in the multiple-access transmission phase and double the system throughput. In this thesis, we focus on the design and analysis of PNC schemes in multiple-input multiple-
output (MIMO) TWRCs.It is critical to provide a theoretical analysis of the error performance of PNC in MIMO TWRCs, which is the first part of our research on PNC. We consider a general system model of Rayleigh faded MIMO TWRCs, where the two users may have different numbers of antennas and different signal-to-noise ratios to the
relay. Transmit antenna selection is applied at the two users. We derive the closed-forms of the upper and lower bounds on the uplink error probability of PNC based on maximum-likelihood (ML) detection. To provide insight, the upper and lower bounds on the error probabilities for two special cases are derived, i.e., the TWRC with the single-antenna users and multiple-antenna
relay (referred to as the SIMO TWRC), and the TWRC with the multiple-antenna users and single-antenna
relay (referred to as the MISO TWRC). It is shown that our bounds are tight to Monte-Carlo simulations. Both the theoretical analysis and simulation results demonstrate that the PNC scheme can achieve transmit/receive diversity.Considering that space-time block coding can achieve transmit diversity when there is no channel side information available at the transmitter, we investigate PNC with the Alamouti scheme in a Rayleigh faded MISO TWRC, where each user has two antennas and the
relay has a single antenna. We propose the design criterion for constructing the network codewords which allows each user to recover the other user's messages. Based on ML detection, we find eighteen types of network codewords that satisfy the proposed criterion. We also derive new tight upper bounds on the error probabilities achieved by these network codewords, based on which the PNC scheme with these network codewords is found to achieve full diversity. We then propose new linear decoders to reduce the complexity incurred by ML detection. Through analyzing the error performance, we find that the proposed linear decoders cannot achieve full diversity. To enhance the error performance of the proposed linear decoders, we develop modified linear decoding algorithms, referred to as the log-likelihood ratio (LLR) equal gain combining (EGC), LLR selection combining (SC), network codewords selection (NCS) with EGC, and NCS with SC based decoding algorithms. Numerical results show that the modified decoding algorithms significantly outperform the linear decoders. In addition, we also developed the NCS based ML detection, which slightly outperforms the ML decoder.While the binary code and binary phase-shift-keying…
Advisors/Committee Members: Yuan, Jinhong, Electrical Engineering & Telecommunications, Faculty of Engineering, UNSW.
Subjects/Keywords: Two-way relay channel; Physical-layer network coding; Multiple-input multiple-output
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APA (6th Edition):
Huang, M. (2016). Physical-layer network coding for multiple-input multiple-output relay networks. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/56657 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:41124/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Huang, Mengyu. “Physical-layer network coding for multiple-input multiple-output relay networks.” 2016. Doctoral Dissertation, University of New South Wales. Accessed January 22, 2021.
http://handle.unsw.edu.au/1959.4/56657 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:41124/SOURCE02?view=true.
MLA Handbook (7th Edition):
Huang, Mengyu. “Physical-layer network coding for multiple-input multiple-output relay networks.” 2016. Web. 22 Jan 2021.
Vancouver:
Huang M. Physical-layer network coding for multiple-input multiple-output relay networks. [Internet] [Doctoral dissertation]. University of New South Wales; 2016. [cited 2021 Jan 22].
Available from: http://handle.unsw.edu.au/1959.4/56657 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:41124/SOURCE02?view=true.
Council of Science Editors:
Huang M. Physical-layer network coding for multiple-input multiple-output relay networks. [Doctoral Dissertation]. University of New South Wales; 2016. Available from: http://handle.unsw.edu.au/1959.4/56657 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:41124/SOURCE02?view=true
NSYSU
4.
Hong, Cing-He.
Joint Source and Full-Duplex Relay Space-Time Filtering Design in Amplify-and-Forward MIMO Relay Systems.
Degree: Master, Communications Engineering, 2016, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0731116-190915
► The multiple-input multiple-output relay (MIMO relay) systems are developed to efficiently improve the link reliability and extend the communication coverage. However, the relaying process needs…
(more)
▼ The multiple-input multiple-
output relay (MIMO
relay) systems are developed to efficiently improve the link reliability and extend the communication coverage. However, the relaying process needs two phases to separately receive and re-transmit signals, which is so-called half-duplex transmission. The full-duplex (FD) MIMO
relay systems are then developed to improve the spectral efficiency. However, the
relay nodes incur self-interference due to simultaneous receive and transmission of data signals, which greatly limits the overall end-to-end performance. Therefore, many works focus on the
relay precoder design to mitigate the influence of the self-interference. However, in the presence of frequency selective fading channels, the design is much more involved. In this thesis, we jointly design source and
relay space-time filters to mitigate the influence of both frequency selective fading channel and the self-interference caused by FD device. Since the relation of the input and
output signals caused by the self-interference at the
relay can be modeled as IIR filter, we develop a nonlinear successive interference cancellation (SIC) based
relay space-time filter to suppress the self-interference and meanwhile leverage the channels of the source-
relay and
relay-destination links. The proposed joint source and
relay space-time filters are conducted by minimum mean-squared error (MMSE) and maximum overall capacity. However, the corresponding optimizations are intractable to be solved due to the complicated formulations. We then propose a serious simplification process that can iteratively obtain the closed-form solutions. Numerical results show that the proposed design can significantly outperform the other existing methods.
Advisors/Committee Members: Fan-Shuo Tseng (committee member), Shou-Sheu Lin (chair), Tsang-Yi Wang (chair), Chao-Kai Wen (chair), Wan-Jen Huang (chair).
Subjects/Keywords: self-interference; frequency selective fading channel; space-time filtering; Full-duplex systems; minimum mean-squared error (MMSE); multiple-input multiple-output relay (MIMO Relay) systems
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APA (6th Edition):
Hong, C. (2016). Joint Source and Full-Duplex Relay Space-Time Filtering Design in Amplify-and-Forward MIMO Relay Systems. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0731116-190915
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):
Hong, Cing-He. “Joint Source and Full-Duplex Relay Space-Time Filtering Design in Amplify-and-Forward MIMO Relay Systems.” 2016. Thesis, NSYSU. Accessed January 22, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0731116-190915.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hong, Cing-He. “Joint Source and Full-Duplex Relay Space-Time Filtering Design in Amplify-and-Forward MIMO Relay Systems.” 2016. Web. 22 Jan 2021.
Vancouver:
Hong C. Joint Source and Full-Duplex Relay Space-Time Filtering Design in Amplify-and-Forward MIMO Relay Systems. [Internet] [Thesis]. NSYSU; 2016. [cited 2021 Jan 22].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0731116-190915.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hong C. Joint Source and Full-Duplex Relay Space-Time Filtering Design in Amplify-and-Forward MIMO Relay Systems. [Thesis]. NSYSU; 2016. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0731116-190915
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
NSYSU
5.
Jheng, Fu-jhong.
Full-Duplex Relaying Design in Amplify-and-Forward MIMO Relay Systems.
Degree: Master, Communications Engineering, 2015, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0724115-135324
► Recently, the full-duplex (FD) design has received significant attention due to the ability it provides higher spectral efficiency. Unlike to the conventional half-duplex (HD) device,…
(more)
▼ Recently, the full-duplex (FD) design has received significant attention due to the ability it provides higher spectral efficiency. Unlike to the conventional half-duplex (HD) device, the FD node can simultaneously transmit and receive signals, doubling the spectral efficiency but incurring the loop-interference (LI). In this thesis, we apply the FD to the amplify-and-forward (AF) multiple-input multiple-
output relay (MIMO
Relay) systems. We jointly design the linear source and
relay precoders to mitigate the influence of the SI and meanwhile to leverage the channel links of the source-
relay and the
relay-destination so that the end-to-end performance is enhanced. Herein, both the linear minimum mean-squared error (MMSE) and the nonlinear QR successive interference cancellation (QR-SIC) receivers are considered in the precoder design. Since the related optimization is inherent not convex, finding the optimum solution is difficult. To provide the tractable solution, we propose iterative methods for precoders design regarding to the MMSE and the QR-SIC receivers. In each iterative approach, we split the original problem into two sub-problem, one for solving source precoder and the other for the
relay precoder. Further with some matrix manipulations, each sub-problem can finally obtain the closed-form solution by the Karush-Kuhn-Tucker (KKT) conditions. The source and
relay precoders can be recursively obtained by the two sub-problems. Moreover, we additionally develop a low-complexity iterative approach for the precoders with MMSE receiver. Simulation results validate the proposed designs under various channel and LI conditions.
Advisors/Committee Members: Wan-Jen Huang (chair), Chih-Peng Li (chair), Chun-Tao Lin (chair), Tsang-Yi Wang (chair), Fan-Shuo Tseng (committee member).
Subjects/Keywords: multiple-input multiple-output relay (MIMO relay); amplify-and-forward (AF); Full-duplex (FD); minimum mean-squared error (MMSE); QR successive interference cancellation (QR-SIC); Karush-Kuhn-Tucker (KKT)
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APA (6th Edition):
Jheng, F. (2015). Full-Duplex Relaying Design in Amplify-and-Forward MIMO Relay Systems. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0724115-135324
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):
Jheng, Fu-jhong. “Full-Duplex Relaying Design in Amplify-and-Forward MIMO Relay Systems.” 2015. Thesis, NSYSU. Accessed January 22, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0724115-135324.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Jheng, Fu-jhong. “Full-Duplex Relaying Design in Amplify-and-Forward MIMO Relay Systems.” 2015. Web. 22 Jan 2021.
Vancouver:
Jheng F. Full-Duplex Relaying Design in Amplify-and-Forward MIMO Relay Systems. [Internet] [Thesis]. NSYSU; 2015. [cited 2021 Jan 22].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0724115-135324.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Jheng F. Full-Duplex Relaying Design in Amplify-and-Forward MIMO Relay Systems. [Thesis]. NSYSU; 2015. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0724115-135324
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Indian Institute of Science
6.
Harshan, J.
Coding For Wireless Relay Networks And Mutiple Access Channels.
Degree: PhD, Faculty of Engineering, 2011, Indian Institute of Science
URL: http://etd.iisc.ac.in/handle/2005/1283
► This thesis addresses the design of low-complexity coding schemes for wireless relay networks and multiple access channels. The first part of the thesis is on…
(more)
▼ This thesis addresses the design of low-complexity coding schemes for wireless
relay networks and multiple access channels. The first part of the thesis is on wireless
relay networks and the second part is on multiple access channels.
Distributed space-time coding is a well known technique to achieve spatial diversity in wireless networks wherein, several geographically separated nodes assist a source node to distributively transmit a space-time block code (STBC) to the destination. Such STBCs are referred to as Distributed STBCs (DSTBCs). In the first part of the thesis, we focus on designing full diversity DSTBCs with some nice properties which make them amenable for implementation in practice. Towards that end, a class of full diversity DST-BCs referred to as Co-ordinate Interleaved DSTBCs (CIDSTBCs) are proposed for
relay networks with two-antenna relays. To construct CIDSTBCs, a technique called co-ordinate vector interleaving is introduced wherein, the received signals at different antennas of the
relay are processed in a combined fashion. Compared to the schemes where the received signals at different antennas of the
relay are processed independently, we show that CIDSTBCs provide coding gain which comes in with negligible increase in the processing complexity at the relays. Subsequently, we design single-symbol ML decodable (SSD) DSTBCs for
relay networks with single-antenna nodes. In particular, two classes of SSD DSTBCs referred to as (i) Semi-orthogonal SSD Precoded DSTBCs and (ii) Training-Symbol Embedded (TSE) SSD DSTBCs are proposed. A detailed analysis on the maximal rate of such DSTBCs is presented and explicit DSTBCs achieving the maximal rate are proposed. It is shown that the proposed codes have higher rates than the existing SSD DSTBCs.
In the second part, we study two-user Gaussian Multiple Access Channels (GMAC). Capacity regions of two-user GMAC are well known. Though, capacity regions of such channels provide insights into the achievable rate pairs in an information theoretic sense, they fail to provide information on the achievable rate pairs when we consider finitary restrictions on the input alphabets and analyze some real world practical signal constellations like QAM and PSK signal sets. Hence, we study the capacity aspects of two-user GMAC with finite input alphabets. In particular, Constellation Constrained (CC) capacity regions of two-user SISO-GMAC are computed for several orthogonal and non-orthogonal multiple access schemes (abbreviated as O-MA and NO-MA schemes respectively). It is first shown that NO-MA schemes strictly offer larger capacity regions than the O-MA schemes for finite input alphabets. Subsequently, for NO-MA schemes, code pairs based on Trellis Coded Modulation (TCM) are proposed such that any rate pair on the CC capacity region can be approached. Finally, we consider a two-user Multiple-Input Multiple-
Output (MIMO) fading MAC and design STBC pairs such that ML decoding complexity is reduced.
Advisors/Committee Members: Sundar Rajan, B (advisor).
Subjects/Keywords: Wireless Relay Communication; Wireless Relay Networks - Coding; Multiple Access Channels - Coding; Space-Time Block Codes (STBCs); Distributed Space-Time Block Codes (DSTBCs); Antennas; Gaussian Multiple Access Channels (GMAC); Wireless Communication; Multiple Input-Multiple Output Channels; Distributed Space-Time Coding; Two-Antenna-Relays Networks; Relay Networks; Multiple-Input Multiple-Output (MIMO); Communication Engineering
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APA ·
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APA (6th Edition):
Harshan, J. (2011). Coding For Wireless Relay Networks And Mutiple Access Channels. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/1283
Chicago Manual of Style (16th Edition):
Harshan, J. “Coding For Wireless Relay Networks And Mutiple Access Channels.” 2011. Doctoral Dissertation, Indian Institute of Science. Accessed January 22, 2021.
http://etd.iisc.ac.in/handle/2005/1283.
MLA Handbook (7th Edition):
Harshan, J. “Coding For Wireless Relay Networks And Mutiple Access Channels.” 2011. Web. 22 Jan 2021.
Vancouver:
Harshan J. Coding For Wireless Relay Networks And Mutiple Access Channels. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2011. [cited 2021 Jan 22].
Available from: http://etd.iisc.ac.in/handle/2005/1283.
Council of Science Editors:
Harshan J. Coding For Wireless Relay Networks And Mutiple Access Channels. [Doctoral Dissertation]. Indian Institute of Science; 2011. Available from: http://etd.iisc.ac.in/handle/2005/1283
RMIT University
7.
Gurung, A.
Diversity techniques for broadband wireless communications: performance enhancement and analysis.
Degree: 2010, RMIT University
URL: http://researchbank.rmit.edu.au/view/rmit:10388
► The diversity techniques have been proven to be effective for next generation broadband wireless communications, and are the focus of this thesis. The diversity techniques…
(more)
▼ The diversity techniques have been proven to be effective for next generation broadband wireless communications, and are the focus of this thesis. The diversity techniques can be broadly categorized into three types: Space, Time, and Frequency. In this thesis, we are mainly concerned with frequency and space diversity techniques. Orthogonal Frequency Division Multiplexing (OFDM) is a frequency diversity technique which offers several benefits such as easier digital implementation, immunity to multipath channels, low complexity channel equalization, etc. Despite these desirable features, there are few inherent problems in OFDM such as high peak-to-average power ratio (PAPR). High PAPR demands large dynamic range in the transmitted chain such as digital to analog converter (DAC) and power amplifier (PA). Unless pre-processed, the transmitted signal gets distorted due to quantization errors and inter-modulation. In the initial stage of PhD candidature, the author focused on PAPR reduction techniques. A simple modification on conventional iterative clipping and filtering (ICF) technique was proposed which has less computational complexity. The power savings achievable from clipping and filtering method was considered next. Furthermore the ICF is compared with another distortion-less PAPR reduction technique called Selective Mapping (SLM) based on power savings. Finally, impact of clipping and filtering on the channel estimation was analyzed. Space diversity seeks to exploit the multi-path characteristics of wireless channels to improve the performance. The simplest form of the space diversity is the receive diversity where two or more antennas with sufficient spacing collect independent copies of the same transmitted signal, which contributes to better signal reception. In this thesis new analytical expressions for spectral efficiency, capacity, and error rates were presented for adaptive systems with channel estimation error. Beamforming (steering signal towards desired receiver) is another useful technique in multiple-antenna systems to further improve the system performance. MRT (Maximal Ratio Transmission) or MIMO-MRC is such system where the transmitter, based on channel feedback from the receiver, uses weighting factors to steer the transmitted signal. Closed form expressions for symbol error rates were derived for MRT system with channel estimation error. The results were extended to evaluate closed form expressions of error rates for Rectangular QAM. Antenna correlation was considered in another contribution on MRC systems. Relay and Cooperative networks represent another form of spatial diversity and have recently attracted significant research attention. These networks rely on intermediate nodes called "relays" to establish communication between the source and the destination. In addition to coverage extension, the relay networks have shown to offer cooperative diversity when there is a direct link or multiple relays. The first contribution is to analyze a dual-hop amplify-forward relay networks…
Subjects/Keywords: Fields of Research; Diversity Techniques; Orthogonal Frequency Division Multiplexing (OFDM); Peak-to-Average Power Ratio (PAPR); Multiple Input Multiple Output (MIMO); Relay Networks; Cooperative System; Performance Analysis
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APA (6th Edition):
Gurung, A. (2010). Diversity techniques for broadband wireless communications: performance enhancement and analysis. (Thesis). RMIT University. Retrieved from http://researchbank.rmit.edu.au/view/rmit:10388
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):
Gurung, A. “Diversity techniques for broadband wireless communications: performance enhancement and analysis.” 2010. Thesis, RMIT University. Accessed January 22, 2021.
http://researchbank.rmit.edu.au/view/rmit:10388.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Gurung, A. “Diversity techniques for broadband wireless communications: performance enhancement and analysis.” 2010. Web. 22 Jan 2021.
Vancouver:
Gurung A. Diversity techniques for broadband wireless communications: performance enhancement and analysis. [Internet] [Thesis]. RMIT University; 2010. [cited 2021 Jan 22].
Available from: http://researchbank.rmit.edu.au/view/rmit:10388.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Gurung A. Diversity techniques for broadband wireless communications: performance enhancement and analysis. [Thesis]. RMIT University; 2010. Available from: http://researchbank.rmit.edu.au/view/rmit:10388
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Oulu
8.
Jayasinghe, L. K. (Laddu Keeth Saliya).
Analysis on MIMO relaying scenarios in wireless communication systems.
Degree: 2015, University of Oulu
URL: http://urn.fi/urn:isbn:9789526207391
► Abstract The thesis concentrates on evaluating and improving performances of various multiple-input multiple-output (MIMO) relaying scenarios that are particularly relevant to future wireless systems. A…
(more)
▼ Abstract
The thesis concentrates on evaluating and improving performances of various multiple-input multiple-
output (MIMO) relaying scenarios that are particularly relevant to future wireless systems. A greater emphasis is placed on important practical situations, considering
relay deployments, availability of channel state information (CSI), limitations of spectrum, and information secrecy.
Initially, the performance of a non-coherent amplify-and-forward (AF) MIMO relaying is analyzed when the
relay is deployed with the
relay-to-destination channel having a line-of-sight (LoS) path. The main attention is given to analyzing the performance of orthogonal space-time block coded based non-coherent AF MIMO system. Exact expressions of statistical parameters and performance metrics are derived considering the instantaneous signal-to-noise ratio (SNR) received at the destination. These performance metrics reveal that a strong LoS component in
relay-destination channel always limits the performance promised by MIMO scattering environment when both nodes have multiple antennas.
The thesis also considers scenarios in MIMO two-way relaying (TWR) with physical layer network coding (PNC) mapping at the
relay. PNC mapping becomes complex with multiple streams being combined at the
relay node. Joint precoder-decoder schemes are considered to ease this, and various studies are carried out depending on the CSI. The zero-forcing criterion is used at the nodes when perfect CSI is available. For the imperfect CSI scenario, a robust joint precoder-decoder design is considered. The precoder and decoder matrices are obtained by solving optimization problems, which are formulated to maximize sum-rate and minimize weighted mean square error (WMSE) under transmit power constraints on the nodes.
Next, a precoder-decoder scheme for MIMO underlay device-to-device (D2D) communication system is investigated by considering two D2D modes; PNC based D2D and direct D2D. The joint design is based on minimizing mean square error (MSE) which is useful to mitigate interference, and to improve the performance of both D2D and cellular communications. Distributed and centralized algorithms are proposed considering bi-directional communication in both D2D and cellular communications. System performance is discussed with two transmit mode selection schemes as dynamic and static selection schemes. The results show that the PNC based D2D mode extends the coverage area of D2D communication.
Finally, secure beamforming schemes for the PNC based MIMO TWR systems are investigated when multiple eavesdroppers are attempting to intercept the user information. The CSI of the user-to-eavesdropper channels is imperfect at the users. The channel estimation errors are assumed with both ellipsoidal bound and Gaussian Markov uncertainty models. Robust optimization problems are formulated considering both scenarios to design beamforming vectors at the users and
relay. Numerical results suggest that the proposed algorithms converge fast and provide higher…
Advisors/Committee Members: Latva-aho, M. (Matti), Rajatheva, N. (Nandana).
Subjects/Keywords: cooperative relay; device-to-device communication; multiple-input multiple-output; physical layer network coding; physical layer security; fyysisen kerroksen turvallisuus; fyysisen kerroksen verkkokoodaus; laitteesta-laitteeseen kommunikaatio; moniantennijärjestelmä; yhteistoiminnallinen toistin
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APA (6th Edition):
Jayasinghe, L. K. (. K. S. (2015). Analysis on MIMO relaying scenarios in wireless communication systems. (Doctoral Dissertation). University of Oulu. Retrieved from http://urn.fi/urn:isbn:9789526207391
Chicago Manual of Style (16th Edition):
Jayasinghe, L K (Laddu Keeth Saliya). “Analysis on MIMO relaying scenarios in wireless communication systems.” 2015. Doctoral Dissertation, University of Oulu. Accessed January 22, 2021.
http://urn.fi/urn:isbn:9789526207391.
MLA Handbook (7th Edition):
Jayasinghe, L K (Laddu Keeth Saliya). “Analysis on MIMO relaying scenarios in wireless communication systems.” 2015. Web. 22 Jan 2021.
Vancouver:
Jayasinghe LK(KS. Analysis on MIMO relaying scenarios in wireless communication systems. [Internet] [Doctoral dissertation]. University of Oulu; 2015. [cited 2021 Jan 22].
Available from: http://urn.fi/urn:isbn:9789526207391.
Council of Science Editors:
Jayasinghe LK(KS. Analysis on MIMO relaying scenarios in wireless communication systems. [Doctoral Dissertation]. University of Oulu; 2015. Available from: http://urn.fi/urn:isbn:9789526207391
Indian Institute of Science
9.
Ubaidulla, P.
Robust Precoder And Transceiver Optimization In Multiuser Multi-Antenna Systems.
Degree: PhD, Faculty of Engineering, 2013, Indian Institute of Science
URL: http://etd.iisc.ac.in/handle/2005/2261
► The research reported in this thesis is concerned with robust precoder and transceiver optimization in multiuser multi-antenna wireless communication systems in the presence of imperfect…
(more)
▼ The research reported in this thesis is concerned with robust precoder and transceiver optimization in multiuser multi-antenna wireless communication systems in the presence of imperfect channel state information(CSI). Precoding at the transmit side, which utilizes the CSI, can improve the system performance and simplify the receiver design. Transmit precoding is essential for inter-user interference cancellation in multiuser downlink where users do not cooperate. Linear and non-linear precoding have been widely investigated as low-complexity alternatives to dirty paper coding-based transmission scheme for multiuser multiple-input multiple-
output(MU-MIMO)downlink. Similarly, in
relay-assisted networks, precoding at the
relay nodes have been shown to improve performance.
The precoder and joint precoder/receive filter (transceiver) designs usually assume perfect knowledge of the CSI. In practical systems, however, the CSI will be imperfect due to estimation errors, feedback errors and feedback delays. Such imperfections in CSI will lead to deterioration of performance of the precoders/transceivers designed assuming perfect CSI. In such situations, designs which are robust to CSI errors are crucial to realize the potential of multiuser multi-antenna systems in practice.
This thesis focuses on the robust designs of precoders and transceivers for MU-MIMO downlink, and for non-regenerative
relay networks in the presence of errors in the CSI. We consider a norm-bounded error(NBE) model, and a stochastic error(SE) model for the CSI errors. These models are suitable for commonly encountered errors, and they allow mathematically and computationally tractable formulations for the robust designs. We adopt a statistically robust design in the case of stochastic error, and a minimax or worst-case robust design in the case of norm-bounded error. We have considered the robust precoder and transceiver designs under different performance criteria based on transmit power and quality-of-service(QoS) constraints. The work reported in this thesis can be grouped into three parts, namely,i ) robust linear pre-coder and transceiver designs for multiuser downlink, ii)robust non-linear precoder and transceiver designs for multiuser downlink, and iii)robust precoder designs for non-regenerative
relay networks.
Linear precoding: In this part, first, a robust precoder for multiuser multiple-input single-
output(MU-MISO)downlink that minimizes the total base station(BS)transmit power with constraints on signal-to-interference-plus-noise ratio(SINR) at the user terminals is considered. We show that this problem can be reformulated as a second order cone program(SOCP) with the same order of computational complexity as that of the non-robust precoder design. Next, a robust design of linear transceiver for MU-MIMO downlink is developed. This design is based on the minimization of sum mean square error(SMSE) with a constraint on the total BS transmit power, and assumes that the error in the CSI at the transmitter(CSIT) follows the stochastic error…
Advisors/Committee Members: Chockalingam, A (advisor).
Subjects/Keywords: Signal Processing; Coding Theory; Antenna (Electrical Communication Engineering); Multiuser Multiple-Input Multiple-Output (MU-MIMO) Systems; Multi-Antenna Wireless Communication Systems; Multiuser Multiple-Input Single-Output (MU-MISO) Systems; MIMO Systems - Precoding; Relay Networks; Robust Precoder/Receive Filter Optimization; Robust Linear Precoder; Robust Relay Precoding; Robust Transceiver Design; Channel State Information (CSI); Communication Engineering
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APA ·
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MLA ·
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CSE |
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to Zotero / EndNote / Reference
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APA (6th Edition):
Ubaidulla, P. (2013). Robust Precoder And Transceiver Optimization In Multiuser Multi-Antenna Systems. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/2261
Chicago Manual of Style (16th Edition):
Ubaidulla, P. “Robust Precoder And Transceiver Optimization In Multiuser Multi-Antenna Systems.” 2013. Doctoral Dissertation, Indian Institute of Science. Accessed January 22, 2021.
http://etd.iisc.ac.in/handle/2005/2261.
MLA Handbook (7th Edition):
Ubaidulla, P. “Robust Precoder And Transceiver Optimization In Multiuser Multi-Antenna Systems.” 2013. Web. 22 Jan 2021.
Vancouver:
Ubaidulla P. Robust Precoder And Transceiver Optimization In Multiuser Multi-Antenna Systems. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2013. [cited 2021 Jan 22].
Available from: http://etd.iisc.ac.in/handle/2005/2261.
Council of Science Editors:
Ubaidulla P. Robust Precoder And Transceiver Optimization In Multiuser Multi-Antenna Systems. [Doctoral Dissertation]. Indian Institute of Science; 2013. Available from: http://etd.iisc.ac.in/handle/2005/2261
10.
Huang, Yu-Chih.
Coding for Relay Networks with Parallel Gaussian Channels.
Degree: PhD, Electrical Engineering, 2013, Texas A&M University
URL: http://hdl.handle.net/1969.1/149620
► A wireless relay network consists of multiple source nodes, multiple destination nodes, and possibly many relay nodes in between to facilitate its transmission. It is…
(more)
▼ A wireless
relay network consists of multiple source nodes, multiple destination nodes, and possibly many
relay nodes in between to facilitate its transmission. It is clear that the performance of such networks highly depends on information for- warding strategies adopted at the
relay nodes. This dissertation studies a particular information forwarding strategy called compute-and-forward. Compute-and-forward is a novel paradigm that tries to incorporate the idea of network coding within the physical layer and hence is often referred to as physical layer network coding. The main idea is to exploit the superposition nature of the wireless medium to directly compute or decode functions of transmitted signals at intermediate relays in a net- work. Thus, the coding performed at the physical layer serves the purpose of error correction as well as permits recovery of functions of transmitted signals.
For the bidirectional relaying problem with Gaussian channels, it has been shown by Wilson et al. and Nam et al. that the compute-and-forward paradigm is asymptotically optimal and achieves the capacity region to within 1 bit; however, similar results beyond the memoryless case are still lacking. This is mainly because channels with memory would destroy the lattice structure that is most crucial for the compute-and-forward paradigm. Hence, how to extend compute-and-forward to such channels has been a challenging issue. This motivates this study of the extension of compute-and-forward to channels with memory, such as inter-symbol interference.
The bidirectional relaying problem with parallel Gaussian channels is also studied, which is a relevant model for the Gaussian bidirectional channel with inter-symbol interference and that with multiple-input multiple-
output channels. Motivated by the recent success of linear finite-field deterministic model, we first investigate the corresponding deterministic parallel bidirectional
relay channel and fully characterize its capacity region. Two compute-and-forward schemes are then proposed for the Gaussian model and the capacity region is approximately characterized to within a constant gap.
The design of coding schemes for the compute-and-forward paradigm with low decoding complexity is then considered. Based on the separation-based framework proposed previously by Tunali et al., this study proposes a family of constellations that are suitable for the compute-and-forward paradigm. Moreover, by using Chinese remainder theorem, it is shown that the proposed constellations are isomorphic to product fields and therefore can be put into a multilevel coding framework. This study then proposes multilevel coding for the proposed constellations and uses multistage decoding to further reduce decoding complexity.
Advisors/Committee Members: Narayanan, Krishna R (advisor), Liu, Tie (committee member), Shakkottai, Srinivas (committee member), Srinivasa, Arun R (committee member).
Subjects/Keywords: Network information theory; wireless relay networks; bidirectional relay channels; inter-symbol interference; multiple-input multiple-output; compute-and-forward
…relay network. . . . . . . . . . . . . . . . . . . . . . . .
20
3.1
Bidirectional relay… …4.1
The parallel Gaussian bidirectional relay channel. . . . . . . . . . . .
57
4.2… …forward relay network where S1 , . . . , SK are source
nodes and D1 , . . . , DM are destination… …antennas for which the resulted channels are multiple-input
multiple-output (MIMO)… …a set of parallel bidirectional
relay channels by discrete Fourier transform and singular…
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APA ·
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MLA ·
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Huang, Y. (2013). Coding for Relay Networks with Parallel Gaussian Channels. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/149620
Chicago Manual of Style (16th Edition):
Huang, Yu-Chih. “Coding for Relay Networks with Parallel Gaussian Channels.” 2013. Doctoral Dissertation, Texas A&M University. Accessed January 22, 2021.
http://hdl.handle.net/1969.1/149620.
MLA Handbook (7th Edition):
Huang, Yu-Chih. “Coding for Relay Networks with Parallel Gaussian Channels.” 2013. Web. 22 Jan 2021.
Vancouver:
Huang Y. Coding for Relay Networks with Parallel Gaussian Channels. [Internet] [Doctoral dissertation]. Texas A&M University; 2013. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1969.1/149620.
Council of Science Editors:
Huang Y. Coding for Relay Networks with Parallel Gaussian Channels. [Doctoral Dissertation]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/149620
11.
Islam, Muhammad Adeel.
Performance analysis of dual hop cellular networks.
Degree: 2011, , School of Engineering
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3093
► Explosive growth in wireless technology caused by development in digital and RF circuit fabrications put some serious challenges on wireless system designers and link…
(more)
▼ Explosive growth in wireless technology caused by development in digital and RF circuit fabrications put some serious challenges on wireless system designers and link budget planning. Low transmit power, system coverage and capacity, high data rates, spatial diversity and quality of services (QOS) are the key factors in future wireless communication system that made it attractive. Dual-hop relaying is the promising underlying technique for future wireless communication to address such dilemmas. Based on dual-hop relaying this thesis addresses two scenarios. In the first case the system model employs dual-hop amplify and forward (AF) multiple input multiple output (MIMO) relay channels with transmit and receive antenna selection over independent Rayleigh fading channels where source and destination contain multiple antennas and communicate with each other with help of single antenna relay. It is assumed that the source and destination has perfect knowledge of channel state information (CSI). Our analysis shows that full spatial diversity order can be achieved with minimum number of antennas at source and destination i.e. min{N_s N_d }. In the second case the performance analysis of dual-hop amplify and forward (AF) multiple relay cooperative diversity network with best relay selection schemes over Rayleigh fading channels is investigated where the source and destination communicate with each other through direct and indirect links. Only the performance of best relay is investigated which participates in the transmission alone. The relay node that achieves highest SNR at the destination is selected as a best relay. Once again our analysis shows that full diversity order can be achieved with single relay with fewer resources compare to the regular cooperative diversity system.
Muhammad Adeel Islam 0046 700 412 343
Subjects/Keywords: Diversity techniques; wireless networks; fading channels; relay channels; outage probability; symbol error rate; bit error rate; multiple input multiple output; user cooperation.; Computer Sciences; Datavetenskap (datalogi); Probability Theory and Statistics; Sannolikhetsteori och statistik; Telecommunications; Telekommunikation
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APA (6th Edition):
Islam, M. A. (2011). Performance analysis of dual hop cellular networks. (Thesis). , School of Engineering. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3093
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):
Islam, Muhammad Adeel. “Performance analysis of dual hop cellular networks.” 2011. Thesis, , School of Engineering. Accessed January 22, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3093.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Islam, Muhammad Adeel. “Performance analysis of dual hop cellular networks.” 2011. Web. 22 Jan 2021.
Vancouver:
Islam MA. Performance analysis of dual hop cellular networks. [Internet] [Thesis]. , School of Engineering; 2011. [cited 2021 Jan 22].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3093.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Islam MA. Performance analysis of dual hop cellular networks. [Thesis]. , School of Engineering; 2011. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3093
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Brno University of Technology
12.
Feilhauer, Petr.
Modul reléových výstupů elektronického tachografu: Relay output module for electronic tachograph.
Degree: 2018, Brno University of Technology
URL: http://hdl.handle.net/11012/14922
► This bachelor thesis contains detailed description of function and wiring current Electronic tachograph RE1xx from company UniControls-Tramex. For comparison there is mentioned description of competitor’s…
(more)
▼ This bachelor thesis contains detailed description of function and wiring current Electronic tachograph RE1xx from company UniControls-Tramex. For comparison there is mentioned description of competitor’s products from this branch. The part of this thesis is analysis of measurement actual speed on the train vehicles and analysis of imaging information to staff of vehicle. The base of this finding is making several projects about future way of development of this electronic tachograph. Main programmes of this thesis are design, implementation and verification functions of module relays outputs for Electronic tachograph RE1xx. Practically design must be satisfy with basic technical-law specifications, which refer of this branch for application this device. Thesis contains the description of single parts of scheme, control microcontroller, using of integrated circuits. Further thesis will contain theoretical calculations, design of main software and his implementation to the module. The aim of design and implementation of module relays outputs is evaluation reached outcomes from view technical solutions, functions and price statement of the module.
Advisors/Committee Members: Zezulka, František (advisor), Sirka, Martin (referee).
Subjects/Keywords: Adresovací multiplexor; Antiparalelní ochranná dioda; ATmega64; Drážní vozidlo; Elektromagnetické relé; Elektronický rychloměr; EMC; Filtrovací kondenzátory; Galvanické oddělení; Hardwarový watchdog; ISP (SPI); Jednotka elektroniky; JTAG; Klidový stav linky; Klopný obvod typu D; Komunikační a indikační jednotka; Koncepce vývoje; Mikrokontroler; Modul reléových výstupů; Ochranný transil; Ovládací cívka; Polovodičové relé; Přepínací kanál; Pull-up rezistor; Reléový výstup; Řídicí obvod; RS485; Rychlostní radar Sériová datová komunikace; Spínací kanál; Sériové programování; Testovací software; Addressing multiplexer; Anti-parallel protective diode; ATmega64; Communication and indicative unit; Conception of development; Control circuit; Control coil; D-type flip-flop; Electromagnetic relay; Electronic tachograph; EMC; Filtering capacitors; Galvanic separation; Hardware watchdog; ISP (SPI); JTAG; Microcontroller; Module of relay outputs; Protective transil; Pull-up resistors; Relay output; Release condition of line; RS485; Serial data communication; Serial programming; Solid state relay; Speed radar; Switch-over channel; Switching channel; Unit of electronics; Testing software; Train vehicle
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APA ·
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MLA ·
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Feilhauer, P. (2018). Modul reléových výstupů elektronického tachografu: Relay output module for electronic tachograph. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/14922
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):
Feilhauer, Petr. “Modul reléových výstupů elektronického tachografu: Relay output module for electronic tachograph.” 2018. Thesis, Brno University of Technology. Accessed January 22, 2021.
http://hdl.handle.net/11012/14922.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Feilhauer, Petr. “Modul reléových výstupů elektronického tachografu: Relay output module for electronic tachograph.” 2018. Web. 22 Jan 2021.
Vancouver:
Feilhauer P. Modul reléových výstupů elektronického tachografu: Relay output module for electronic tachograph. [Internet] [Thesis]. Brno University of Technology; 2018. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/11012/14922.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Feilhauer P. Modul reléových výstupů elektronického tachografu: Relay output module for electronic tachograph. [Thesis]. Brno University of Technology; 2018. Available from: http://hdl.handle.net/11012/14922
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Indian Institute of Science
13.
Kiran, T.
Coding For Multi-Antenna Wireless Systems And Wireless Relay Networks.
Degree: PhD, Faculty of Engineering, 2009, Indian Institute of Science
URL: http://etd.iisc.ac.in/handle/2005/399
► Communication over a wireless channel is a challenging task because of the inherent fading effects. Any wireless communication system employs some form of diversity improving…
(more)
▼ Communication over a wireless channel is a challenging task because of the inherent fading effects. Any wireless communication system employs some form of diversity improving techniques in order to improve the reliability of the channel. This thesis deals with efficient code design for two different spatial diversity techniques, viz, diversity by employing multiple antennas at the transmitter and/or the receiver, and diversity through cooperative commu-
nication between users. In other words, this thesis deals with efficient code design for (1) multiple-input multiple-
output (MIMO) channels, and (2) wireless
relay channels. Codes for the MIMO channel are termed space-time (ST) codes and those for the
relay channels are called distributed ST codes.
The first part of the thesis focuses on ST code construction for MIMO fading channel with perfect channel state information (CSI) at the receiver, and no CSI at the transmitter. As a measure of performance we use the rate-diversity tradeoff and the Diversity-Multiplexing Gain (D-MG) Tradeoff,
which are two different tradeoffs characterizing the tradeoff between the rate
and the reliability achievable by any ST code. We provide two types of code
constructions that are optimal with respect to the rate-diversity tradeoff; one is based on the rank-distance codes which are traditionally applied as codes for storage devices, and the second construction is based on a matrix representation of a cayley algebra. The second contribution in ST code constructions is related to codes with
a certain nonvanishing determinant (NVD) property. Motivation for these constructions is a recent result on the necessary and sufficient conditions for an ST code to achieve the D-MG tradeoff. Explicit code constructions satisfying these conditions are provided for certain number of transmit antennas.
The second part of the thesis focuses on distributed ST code construction for wireless
relay channel. The transmission protocol follows a two-hop model wherein the source broadcasts a vector in the first hop and in the second hop the relays transmit a vector that is a transformation of the received vector by a
relay-specific unitary transformation. While the source and relays do not have CSI, at the destination we assume two different scenarios (a) destina-
tion with complete CSI (b) destination with only the
relay-destination CSI. For both these scenarios, we derive a Chernoff bound on the pair-wise error probability and propose code design criteria. For the first case, we provide explicit construction of distributed ST codes with lower decoding complexity compared to codes based on some earlier system models. For the latter case,
we propose a novel differential encoding and differential decoding technique and also provide explicit code constructions.
At the heart of all these constructions is the cyclic division algebra (CDA) and its matrix representations. We translate the problem of code construction in each of the above scenarios to the problem of constructing CDAs satisfying certain properties.…
Advisors/Committee Members: Rajan, Sundar (advisor).
Subjects/Keywords: Antennas; wireless Communication; Wireless Relay communication; Space-Time Codes (ST); Distributed Space-Time Codes; Multiple-Input Multiple-Output (MIMO) Channels - Codes; Wireless Relay Channels - Codes; Space-Time Block Codes (STBC); Nonvanishing Determinant (NVD); Rate-diversity Tradeoff; Cyclic Division Algebra (CDA); Communication Engineering
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APA ·
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APA (6th Edition):
Kiran, T. (2009). Coding For Multi-Antenna Wireless Systems And Wireless Relay Networks. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/399
Chicago Manual of Style (16th Edition):
Kiran, T. “Coding For Multi-Antenna Wireless Systems And Wireless Relay Networks.” 2009. Doctoral Dissertation, Indian Institute of Science. Accessed January 22, 2021.
http://etd.iisc.ac.in/handle/2005/399.
MLA Handbook (7th Edition):
Kiran, T. “Coding For Multi-Antenna Wireless Systems And Wireless Relay Networks.” 2009. Web. 22 Jan 2021.
Vancouver:
Kiran T. Coding For Multi-Antenna Wireless Systems And Wireless Relay Networks. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2009. [cited 2021 Jan 22].
Available from: http://etd.iisc.ac.in/handle/2005/399.
Council of Science Editors:
Kiran T. Coding For Multi-Antenna Wireless Systems And Wireless Relay Networks. [Doctoral Dissertation]. Indian Institute of Science; 2009. Available from: http://etd.iisc.ac.in/handle/2005/399
Indian Institute of Science
14.
Rajan, G Susinder.
Low Decoding Complexity Space-Time Block Codes For Point To Point MIMO Systems And Relay Networks.
Degree: PhD, Faculty of Engineering, 2010, Indian Institute of Science
URL: http://etd.iisc.ac.in/handle/2005/742
► It is well known that communication using multiple antennas provides high data rate and reliability. Coding across space and time is necessary to fully exploit…
(more)
▼ It is well known that communication using multiple antennas provides high data rate and reliability. Coding across space and time is necessary to fully exploit the gains offered by multiple input multiple
output (MIMO) systems. One such popular method of coding for MIMO systems is space-time block coding. In applications where the terminals do not have enough physical space to mount multiple antennas, relaying or cooperation between multiple single antenna terminals can help achieve spatial diversity in such scenarios as well. Relaying techniques can also help improve the range and reliability of communication. Recently it has been shown that certain space-time block codes (STBCs) can be employed in a distributed fashion in single antenna
relay networks to extract the same benefits as in point to point MIMO systems. Such STBCs are called distributed STBCs. However an important practical issue with STBCs and DSTBCs is its associated high maximum likelihood (ML) decoding complexity. The central theme of this thesis is to systematically construct STBCs and DSTBCs applicable for various scenarios such that are amenable for low decoding complexity.
The first part of this thesis provides constructions of high rate STBCs from crossed product algebras that are minimum mean squared error (MMSE) optimal, i.e., achieves the least symbol error rate under MMSE reception. Moreover several previous constructions of MMSE optimal STBCs are found to be special cases of the constructions in this thesis.
It is well known that STBCs from orthogonal designs offer single symbol ML decoding along with full diversity but the rate of orthogonal designs fall exponentially with the number of transmit antennas. Thus it is evident that there exists a tradeoff between rate and ML decoding complexity of full diversity STBCs. In the second part of the thesis, a definition of rate of a STBC is proposed and the problem of optimal tradeoff between rate and ML decoding complexity is posed. An algebraic framework based on extended Clifford algebras is introduced to study the optimal tradeoff for a class of multi-symbol ML decodable STBCs called ‘Clifford unitary weight (CUW) STBCs’ which include orthogonal designs as a special case. Code constructions optimally meeting this tradeoff are also obtained using extended Clifford algebras. All CUW-STBCs achieve full diversity as well.
The third part of this thesis focusses on constructing DSTBCs with low ML decoding complexity for two hop, amplify and forward based
relay networks under various scenarios. The symbol synchronous, coherent case is first considered and conditions for a DSTBC to be multi-group ML decodable are first obtained. Then three new classes of four-group ML decodable full diversity DSTBCs are systematically constructed for arbitrary number of relays. Next the symbol synchronous non-coherent case is considered and full diversity, four group decodable distributed differential STBCs (DDSTBCs) are constructed for power of two number of relays. These DDSTBCs have the best error performance…
Advisors/Committee Members: Sundar Rajan, B (advisor).
Subjects/Keywords: Signal Processing - Digital Techniques; Antennas; Coding Theory; Space-time Block Codes (STBCs); Distributed Space-time Block Codes (DSTBCs); Multiple Input Multiple Output Systems; Decoding; MIMO Systems; Maximum Likelihood (ML) Decoding Complexity; Orthogonal Frequency Division Multiplexing (OFDM); Relay Networks; Distributed Differential Space-Time Block Coding (DDSTBC); Clifford Unitary Weight (CUW); Minimum Mean Squared Error (MMSE); Communication Engineering
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APA (6th Edition):
Rajan, G. S. (2010). Low Decoding Complexity Space-Time Block Codes For Point To Point MIMO Systems And Relay Networks. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/742
Chicago Manual of Style (16th Edition):
Rajan, G Susinder. “Low Decoding Complexity Space-Time Block Codes For Point To Point MIMO Systems And Relay Networks.” 2010. Doctoral Dissertation, Indian Institute of Science. Accessed January 22, 2021.
http://etd.iisc.ac.in/handle/2005/742.
MLA Handbook (7th Edition):
Rajan, G Susinder. “Low Decoding Complexity Space-Time Block Codes For Point To Point MIMO Systems And Relay Networks.” 2010. Web. 22 Jan 2021.
Vancouver:
Rajan GS. Low Decoding Complexity Space-Time Block Codes For Point To Point MIMO Systems And Relay Networks. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2010. [cited 2021 Jan 22].
Available from: http://etd.iisc.ac.in/handle/2005/742.
Council of Science Editors:
Rajan GS. Low Decoding Complexity Space-Time Block Codes For Point To Point MIMO Systems And Relay Networks. [Doctoral Dissertation]. Indian Institute of Science; 2010. Available from: http://etd.iisc.ac.in/handle/2005/742
. 
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