subject:(Telecommunication systems)

University of Johannesburg

1. Snyman, Johannes Jurie. Voice network management from a business perspective.

Degree: 2012, University of Johannesburg

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M.Comm.

Most modern and even not so modern businesses are currently investing in the hire or purchase of private access branch exchange (PABX) equipment. Usually… (more)

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M.Comm.

Most modern and even not so modern businesses are currently investing in the hire or purchase of private access branch exchange (PABX) equipment. Usually the main concern is one of reduced costs to the company, since the internal calls between users on the same PABX are not routed via the public telecommunications operator (Telkom) and therefore free of charge [ James, 1997: 17 ]. Larger companies are experiencing the problem that their offices are distributed countrywide. They can install PABX equipment at each regional office, but this will only allow the employees within the regional office to communicate via internal calls. These organisationssoon realise the need for a voice network that provide them with the capability to communicate internally on a country-wide and in some cases, even a worldwide scale. A private voice network can be established by following two routes. If the company is relatively small and cannot afford its own transmission infrastructure in the form of openwire routes. coaxial cables. microwave routes, satellite routes and the associated multiplexers and flexible multiplexers. then they can lease transmission infrastructure from the public telecommunications operator (Telkom) and pay rental and other associated charges for usage thereof If the company can afford the capital investment in its own transmission infrastructure, it will be capable of communicating on a countrywide basis without relying on the service provided by the public telecommunications operator. In most cases, however, the latter option is illegal, due to regulatory protection of the national telecommunications operator. as stipulated by the telecommunications act (103/1996). In some cases, like the Transnet group, legislation requires the use of a private telecommunications network. The reason for this was that a major catastrophe in the transport industry might result due to problems with the telecommunications facilities. In that case, the public telecommunications operator would not accept any responsibility for the consequences of the break in communications. Transtel is the business unit that acts as a "private telecommunications operator" for the Transnet group . Transtel provides both voice and data communications to its clients within the Transnet group . In this case the main concern is not one of reduced costs, and therefore Transtel is implementing a tariff structure similar to that of the public telecommunications operator. The problem of providing voice communications between geographically distributed offices must be solved reliably and efficiently by the private voice network implemented by Transtel to serve the Transnet group. This implies that Transtel have the challenging responsibility to implement a managed voice network, in order to ensure better service levels than can be obtained from Telkom. The next problem that faces the private telecommunications operators for organisations with several business units and a plethora of departments, is that the costs for telecommunications facilities…

Subjects/Keywords: Telecommunication systems - Management

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APA (6^th Edition):

Snyman, J. J. (2012). Voice network management from a business perspective. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/6371

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Snyman, Johannes Jurie. “Voice network management from a business perspective.” 2012. Thesis, University of Johannesburg. Accessed February 27, 2021. http://hdl.handle.net/10210/6371.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Snyman, Johannes Jurie. “Voice network management from a business perspective.” 2012. Web. 27 Feb 2021.

Vancouver:

Snyman JJ. Voice network management from a business perspective. [Internet] [Thesis]. University of Johannesburg; 2012. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10210/6371.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Snyman JJ. Voice network management from a business perspective. [Thesis]. University of Johannesburg; 2012. Available from: http://hdl.handle.net/10210/6371

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Johannesburg

2. Kruger, Fritz. Die aanpassing van 'n foutbestuurstelsel om bestuursinformasie in 'n telekommunikasie-netwerk te verskaf.

Degree: 2012, University of Johannesburg

URL: http://hdl.handle.net/10210/7073

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M.Comm.

In today's society everyone is dependent on information for decision making, and a big part of the information is provided via telecommunication lines. Telecommunication… (more)

Subjects/Keywords: Telecommunication - South Africa; Business information services.; Telecommunication systems.; Telecommunication systems - Management.

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APA (6^th Edition):

Kruger, F. (2012). Die aanpassing van 'n foutbestuurstelsel om bestuursinformasie in 'n telekommunikasie-netwerk te verskaf. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/7073

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kruger, Fritz. “Die aanpassing van 'n foutbestuurstelsel om bestuursinformasie in 'n telekommunikasie-netwerk te verskaf.” 2012. Thesis, University of Johannesburg. Accessed February 27, 2021. http://hdl.handle.net/10210/7073.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kruger, Fritz. “Die aanpassing van 'n foutbestuurstelsel om bestuursinformasie in 'n telekommunikasie-netwerk te verskaf.” 2012. Web. 27 Feb 2021.

Vancouver:

Kruger F. Die aanpassing van 'n foutbestuurstelsel om bestuursinformasie in 'n telekommunikasie-netwerk te verskaf. [Internet] [Thesis]. University of Johannesburg; 2012. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10210/7073.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kruger F. Die aanpassing van 'n foutbestuurstelsel om bestuursinformasie in 'n telekommunikasie-netwerk te verskaf. [Thesis]. University of Johannesburg; 2012. Available from: http://hdl.handle.net/10210/7073

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Johannesburg

3. Fouché, Leon. Multisimbool lynkodes met hoër orde spektrale nulle by gelykstroom.

Degree: 2014, University of Johannesburg

URL: http://hdl.handle.net/10210/10255

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M.Ing. (Electrical and Electronic Engineering)

Since the beginning of telecommunications. more than 100 years ago, systems have been developed through a constant interaction between technical… (more)

Subjects/Keywords: Digital communications; Telecommunication systems

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APA (6^th Edition):

Fouché, L. (2014). Multisimbool lynkodes met hoër orde spektrale nulle by gelykstroom. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/10255

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Fouché, Leon. “Multisimbool lynkodes met hoër orde spektrale nulle by gelykstroom.” 2014. Thesis, University of Johannesburg. Accessed February 27, 2021. http://hdl.handle.net/10210/10255.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Fouché, Leon. “Multisimbool lynkodes met hoër orde spektrale nulle by gelykstroom.” 2014. Web. 27 Feb 2021.

Vancouver:

Fouché L. Multisimbool lynkodes met hoër orde spektrale nulle by gelykstroom. [Internet] [Thesis]. University of Johannesburg; 2014. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10210/10255.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Fouché L. Multisimbool lynkodes met hoër orde spektrale nulle by gelykstroom. [Thesis]. University of Johannesburg; 2014. Available from: http://hdl.handle.net/10210/10255

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

4. Huang, Yifan ECE. Applications of nonblocking network theory.

Degree: 2018, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-93128 ; https://doi.org/10.14711/thesis-991012615969303412 ; http://repository.ust.hk/ir/bitstream/1783.1-93128/1/th_redirect.html

► Nonblocking networks has been widely used in telephone networks, various circuit switching systems, and parallel computers. Nowadays, the increasing demand on networks has raised a… (more)

Subjects/Keywords: Telecommunication ; Switching systems ; Computer networks

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APA (6^th Edition):

Huang, Y. E. (2018). Applications of nonblocking network theory. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-93128 ; https://doi.org/10.14711/thesis-991012615969303412 ; http://repository.ust.hk/ir/bitstream/1783.1-93128/1/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 (16^th Edition):

Huang, Yifan ECE. “Applications of nonblocking network theory.” 2018. Thesis, Hong Kong University of Science and Technology. Accessed February 27, 2021. http://repository.ust.hk/ir/Record/1783.1-93128 ; https://doi.org/10.14711/thesis-991012615969303412 ; http://repository.ust.hk/ir/bitstream/1783.1-93128/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Huang, Yifan ECE. “Applications of nonblocking network theory.” 2018. Web. 27 Feb 2021.

Vancouver:

Huang YE. Applications of nonblocking network theory. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2018. [cited 2021 Feb 27]. Available from: http://repository.ust.hk/ir/Record/1783.1-93128 ; https://doi.org/10.14711/thesis-991012615969303412 ; http://repository.ust.hk/ir/bitstream/1783.1-93128/1/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:

Huang YE. Applications of nonblocking network theory. [Thesis]. Hong Kong University of Science and Technology; 2018. Available from: http://repository.ust.hk/ir/Record/1783.1-93128 ; https://doi.org/10.14711/thesis-991012615969303412 ; http://repository.ust.hk/ir/bitstream/1783.1-93128/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Zambia

5. Chihana, Emmanuel Lusungu. A study on telecommunicationn tower sharing among mobile network operators in Zambia .

Degree: 2018, University of Zambia

URL: http://dspace.unza.zm:8080/xmlui/handle/123456789/5565

► Mobile Network Operators (MNOs) Airtel, MTN, and Zambia Telecommunication (Zamtel) in Zambia adopted a tower-sharing model practised in developed countries such as the United States,… (more)

Subjects/Keywords: Telecommunication systems – Mobile communication systems – Zambia

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APA (6^th Edition):

Chihana, E. L. (2018). A study on telecommunicationn tower sharing among mobile network operators in Zambia . (Thesis). University of Zambia. Retrieved from http://dspace.unza.zm:8080/xmlui/handle/123456789/5565

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chihana, Emmanuel Lusungu. “A study on telecommunicationn tower sharing among mobile network operators in Zambia .” 2018. Thesis, University of Zambia. Accessed February 27, 2021. http://dspace.unza.zm:8080/xmlui/handle/123456789/5565.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chihana, Emmanuel Lusungu. “A study on telecommunicationn tower sharing among mobile network operators in Zambia .” 2018. Web. 27 Feb 2021.

Vancouver:

Chihana EL. A study on telecommunicationn tower sharing among mobile network operators in Zambia . [Internet] [Thesis]. University of Zambia; 2018. [cited 2021 Feb 27]. Available from: http://dspace.unza.zm:8080/xmlui/handle/123456789/5565.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chihana EL. A study on telecommunicationn tower sharing among mobile network operators in Zambia . [Thesis]. University of Zambia; 2018. Available from: http://dspace.unza.zm:8080/xmlui/handle/123456789/5565

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Oklahoma

6. 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 · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th 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 (16^th Edition):

Shahriar, Abu Zafar. “Evaluation of Network Mobility Schemes for Terrestrial and Satellite Networks.” 2012. Doctoral Dissertation, University of Oklahoma. Accessed February 27, 2021. http://hdl.handle.net/11244/319493.

MLA Handbook (7^th Edition):

Shahriar, Abu Zafar. “Evaluation of Network Mobility Schemes for Terrestrial and Satellite Networks.” 2012. Web. 27 Feb 2021.

Vancouver:

Shahriar AZ. Evaluation of Network Mobility Schemes for Terrestrial and Satellite Networks. [Internet] [Doctoral dissertation]. University of Oklahoma; 2012. [cited 2021 Feb 27]. 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

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/11244/318543

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

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th 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 (16^th Edition):

Shahriar, Abu Zafar. “Evaluation of Network Mobility Schemes for Terrestrial and Satellite Networks.” 2012. Doctoral Dissertation, University of Oklahoma. Accessed February 27, 2021. http://hdl.handle.net/11244/318543.

MLA Handbook (7^th Edition):

Shahriar, Abu Zafar. “Evaluation of Network Mobility Schemes for Terrestrial and Satellite Networks.” 2012. Web. 27 Feb 2021.

Vancouver:

Shahriar AZ. Evaluation of Network Mobility Schemes for Terrestrial and Satellite Networks. [Internet] [Doctoral dissertation]. University of Oklahoma; 2012. [cited 2021 Feb 27]. 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

University of Johannesburg

8. Van Aswegen, Wouter. 'n Objek-georiënteerde benadering in die daarstelling van 'n uitsaainetwerk-beplanningsmodel vir die SAUK : seindistribusie.

Degree: 2014, University of Johannesburg

URL: http://hdl.handle.net/10210/10146

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M.Tech. (Computer Science)

The Signal Distribution department of the SABC does planning regarding the signal distribution or broadcasting network of the SABC. In order to… (more)

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M.Tech. (Computer Science)

The Signal Distribution department of the SABC does planning regarding the signal distribution or broadcasting network of the SABC. In order to do effective planning a tool had to be developed to assist in the planning of the broadcasting network. The Rand Afrikaans University was asked to supply a student to analyze the problems surrounding the development of such a tool and supply the SABC with a solution to the problems. The problems surrounding the development of a broadcast network planning model were the availability and accuracy of the information needed for planning. The data needed was spread throughout the country with only manual means to transport the data. The solution to the problem would be to develop a system to cope with the decentralized database and to gather the data in order to supply valuable planning information. To provide a framework for the solution of the planning problem, a broadcasting network was compared with a computer network. The comparison revealed a number of parallels between a broadcasting and a computer network. As a result of the resemblance between the two types of networks, a foundation for the development of a planning model for a broadcasting network could be identified. The ISO IS OSI approach was used as a foundation for the development of the model. The principles of the seven layers along with the three network management models The broadcasting network model was developed using the principles of the OSI approach, object orientation, geographical information systems and graphical user interfaces. A "package" was defined to assist in the logical data flow of the model. The package contains the specific data used in a calculation. A package containing information can be split or combined according to strict rules. The effective management of the package is a central issue in the development of the planning model. A prototype system was developed on PC-Arc/Info, a PC based GIS. The prototype's aim was to prove that the principles used in the model could be implemented successfully. As the developed system was intended to serve as a prototype, it did not implement the full functionality of the model, but only the functions necessary to prove the viability of the model.

Subjects/Keywords: Telecommunication systems - Technological innovations; Signal theory (Telecommunication); Broadcasting - South Africa

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APA (6^th Edition):

Van Aswegen, W. (2014). 'n Objek-georiënteerde benadering in die daarstelling van 'n uitsaainetwerk-beplanningsmodel vir die SAUK : seindistribusie. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/10146

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Van Aswegen, Wouter. “'n Objek-georiënteerde benadering in die daarstelling van 'n uitsaainetwerk-beplanningsmodel vir die SAUK : seindistribusie.” 2014. Thesis, University of Johannesburg. Accessed February 27, 2021. http://hdl.handle.net/10210/10146.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Van Aswegen, Wouter. “'n Objek-georiënteerde benadering in die daarstelling van 'n uitsaainetwerk-beplanningsmodel vir die SAUK : seindistribusie.” 2014. Web. 27 Feb 2021.

Vancouver:

Van Aswegen W. 'n Objek-georiënteerde benadering in die daarstelling van 'n uitsaainetwerk-beplanningsmodel vir die SAUK : seindistribusie. [Internet] [Thesis]. University of Johannesburg; 2014. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10210/10146.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Van Aswegen W. 'n Objek-georiënteerde benadering in die daarstelling van 'n uitsaainetwerk-beplanningsmodel vir die SAUK : seindistribusie. [Thesis]. University of Johannesburg; 2014. Available from: http://hdl.handle.net/10210/10146

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Massey University

9. Li, Yifan. An investigation into the advanced time division multiple access (ATDMA) protocol for a personal communication network.

Degree: Master of Technology, Information Engineering, 1997, Massey University

URL: http://hdl.handle.net/10179/10692

► The performance of the Advanced Time Division Multiple Access (ATDMA) protocol in a microcell environment has been investigated in this thesis. The ATDMA protocol is… (more)

Subjects/Keywords: Telecommunication systems; Telecommunication – Standards

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APA (6^th Edition):

Li, Y. (1997). An investigation into the advanced time division multiple access (ATDMA) protocol for a personal communication network. (Masters Thesis). Massey University. Retrieved from http://hdl.handle.net/10179/10692

Chicago Manual of Style (16^th Edition):

Li, Yifan. “An investigation into the advanced time division multiple access (ATDMA) protocol for a personal communication network.” 1997. Masters Thesis, Massey University. Accessed February 27, 2021. http://hdl.handle.net/10179/10692.

MLA Handbook (7^th Edition):

Li, Yifan. “An investigation into the advanced time division multiple access (ATDMA) protocol for a personal communication network.” 1997. Web. 27 Feb 2021.

Vancouver:

Li Y. An investigation into the advanced time division multiple access (ATDMA) protocol for a personal communication network. [Internet] [Masters thesis]. Massey University; 1997. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10179/10692.

Council of Science Editors:

Li Y. An investigation into the advanced time division multiple access (ATDMA) protocol for a personal communication network. [Masters Thesis]. Massey University; 1997. Available from: http://hdl.handle.net/10179/10692

Stellenbosch University

10. Marcos, Juliana Thomasia Chakirath. Handover in a distributed system of UAVs: application to wildlife monitoring.

Degree: MSc, Mathematical Sciences, 2020, Stellenbosch University

URL: http://hdl.handle.net/10019.1/109292

►

ENGLISH ABSTRACT: Wildlife surveillance is of significant interest for the protection of animals and their habitats. In this study, a distributed system of unmanned aerial… (more)

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ENGLISH ABSTRACT: Wildlife surveillance is of significant interest for the protection of animals and their habitats. In this study, a distributed system of unmanned aerial vehicles (UAVs) or drones is designed for single-animal tracking in terrestrial settings. The system involves four main components which constitute key contributions of the study. The main component is a visual object tracking approach based on the use of a particle filter that switches between measurements from two sources: a simple and fast approach based on colour image segmentation and a slower but more sophisticated method based on a deep learning object detector, the third version of the You Only Look Once detector (YOLOv3). The particle filter switches between the measurement sources using the structural similarity (SSIM) index from the image-processing literature. The SSIM index is also applied in the study for handover of tracking between a pair of drones. Some of the components of the monitoring system have been simulated using wildlife footage recorded by drone (obtained from an animal behaviour group). Extensive simulation tests were carried out during the study. These demonstrate, amongst other results, that better real-time object detection is obtained by replacing YOLOv3 by techniques such as boosting and channel and spatial reliability tracking (CSRT). The design developed and components tested suggest some directions for single-animal tracking by a distributed system of drones. Keywords: Animal tracking algorithm, boosting, channel and spatial reliability tracking (CSRT), drone, handover, multiple instance learning (MIL), particle filter, structural similarity (SSIM), unmanned aerial vehicle (UAV), You Only Look Once version 3 (YOLOv3).

AFRIKAANSE OPSOMMING: Die waarneming van wildslewe is van opmerklike belang vir die konservasie van diere en hul habitatte. Hierdie studie maak gebruik van ’n verspreide stelsel wat bestaan uit onbemande lug voertuie (UAVs), of ’drones,’ wat ontwerp is om ’n enkele dier te agtervolg in aardse instellings. Die sisteem bestaan uit vier hoof komponente, en hierdie komponente is die sleutel bydraers vir die studie. Die belangrikste komponent is ’n visuele voorwerpopsporings tegnologie gebaseer op deeltjiefilter wat wissel tussen metings vanaf twee bronne: ’n eenvoudige en vinnige benadering wat gebaseer is op kleurprintsegmentering en ’n stadiger, maar meer gesofistikeerde, metode wat gebaseer is op ’n diep detektor vir leervoorwerpe, die derde instelling van die ’You Only Look Once’ program (YOLOv3). Die deeltjiefilter skakel tussen die meetbronne deur gebruik te maak van die strukturele ooreenkoms (SSIM) indeks uit die beeldverwerkingsliteratuur. Die SSIM-indeks word ook toegepas in die studie vir die oorhandiging van die opsporings proses tussen hommeltuie. Sommige van die komponente van die moniteringstelsel is gesimuleer met behulp van wild beeldmateriaal wat deur hommeltuie geneem is (verkry van ’n dieregedraggroep). Uitgebreide simulasietoetse is tydens die…

Advisors/Committee Members: Utete, Simukai Wanzira, Stellenbosch University. Faculty of Science. Dept. of Mathematical Sciences. Division Applied Mathematics..

Subjects/Keywords: Wildlife monitoring; Drone aircraft; Roaming (Telecommunication); Handover (Telecommunication); Distributed systems; UCTD

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APA (6^th Edition):

Marcos, J. T. C. (2020). Handover in a distributed system of UAVs: application to wildlife monitoring. (Masters Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/109292

Chicago Manual of Style (16^th Edition):

Marcos, Juliana Thomasia Chakirath. “Handover in a distributed system of UAVs: application to wildlife monitoring.” 2020. Masters Thesis, Stellenbosch University. Accessed February 27, 2021. http://hdl.handle.net/10019.1/109292.

MLA Handbook (7^th Edition):

Marcos, Juliana Thomasia Chakirath. “Handover in a distributed system of UAVs: application to wildlife monitoring.” 2020. Web. 27 Feb 2021.

Vancouver:

Marcos JTC. Handover in a distributed system of UAVs: application to wildlife monitoring. [Internet] [Masters thesis]. Stellenbosch University; 2020. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10019.1/109292.

Council of Science Editors:

Marcos JTC. Handover in a distributed system of UAVs: application to wildlife monitoring. [Masters Thesis]. Stellenbosch University; 2020. Available from: http://hdl.handle.net/10019.1/109292

Hong Kong University of Science and Technology

11. Lian, Lixiang ECE. Compressive sensing algorithms with applications to massive MIMO systems.

Degree: 2020, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-103991 ; https://doi.org/10.14711/thesis-991012786269503412 ; http://repository.ust.hk/ir/bitstream/1783.1-103991/1/th_redirect.html

► Compressive sensing (CS) has attracted significant attention as a technique that under-samples high dimensional signals and accurately recovers them exploiting the sparsity of these signals.… (more)

▼ Compressive sensing (CS) has attracted significant attention as a technique that under-samples high dimensional signals and accurately recovers them exploiting the sparsity of these signals. There are several ingredients of the CS algorithm. The first is the structure of the sparse signal. By exploiting additional signal structures in addition to the simple sparsity, additional performance gains can be obtained. How to choose a flexible yet tractable sparse prior to capture various sophisticated structured sparsity in specific application would be one of the challenges for the CS algorithm design. Another important ingredient that would affect the CS recovery performance is the measurement matrix. Different applications may result in measurement matrices with different features. How to handle a general measurement matrix would be another challenge for the CS algorithm design. In wireless communication system, due to the limited number of scatterers in the environment, the massive multi-input multi-output (MIMO) channel can be quite sparse under an appropriate spatial basis. Besides the channel sparsity, the massive MIMO channel further exhibits additional structures. In this thesis, we focus on the CS algorithm designs with applications to massive MIMO systems to exploit the possible structured sparsity and handle specific measurement requirement under different application contexts. First, we consider channel support side information (CSSI) is available at base station, which can be exploited to enhance the channel estimation performance and reduce the pilot overhead. We propose a weighted LASSO algorithm to fully exploit the CSSI and propose an optimal weight policy to optimize the recovery performance. We also derive the closed-form accurate expression for the minimum asymptotic normalized squared error and characterize the minimum number of measurements required to achieve stable recovery. Then, we consider a channel tracking problem in downlink frequency-division duplexing (FDD) massive MIMO system. We propose a two-dimensional Markov model to capture the two-dimensional (2D) dynamic sparsity of massive MIMO channels. We derive an effective message passing algorithm to recursively track the dynamic massive MIMO channels exploiting the 2D dynamic sparsity. Besides the above works, we further propose a more general CS algorithm to solve the problem of recovering a structured sparse signal from a linear measurement model with uncertain measurement matrix. The proposed general framework can be utilized to provide highly accurate user location tracking in massive MIMO systems. Specifically, a three-layer hierarchical structured sparse prior model is proposed to capture complicated structured sparsities. By combining the message passing and variational Bayesian inference (VBI) approaches via the turbo framework, the proposed Turbo-VBI algorithm is able to fully exploit the structured sparsity for robust recovery of structured sparse signals under an uncertain measurement matrix.

Subjects/Keywords: MIMO systems ; Compressed sensing (Telecommunication) ; Signal processing

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APA (6^th Edition):

Lian, L. E. (2020). Compressive sensing algorithms with applications to massive MIMO systems. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-103991 ; https://doi.org/10.14711/thesis-991012786269503412 ; http://repository.ust.hk/ir/bitstream/1783.1-103991/1/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 (16^th Edition):

Lian, Lixiang ECE. “Compressive sensing algorithms with applications to massive MIMO systems.” 2020. Thesis, Hong Kong University of Science and Technology. Accessed February 27, 2021. http://repository.ust.hk/ir/Record/1783.1-103991 ; https://doi.org/10.14711/thesis-991012786269503412 ; http://repository.ust.hk/ir/bitstream/1783.1-103991/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lian, Lixiang ECE. “Compressive sensing algorithms with applications to massive MIMO systems.” 2020. Web. 27 Feb 2021.

Vancouver:

Lian LE. Compressive sensing algorithms with applications to massive MIMO systems. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2020. [cited 2021 Feb 27]. Available from: http://repository.ust.hk/ir/Record/1783.1-103991 ; https://doi.org/10.14711/thesis-991012786269503412 ; http://repository.ust.hk/ir/bitstream/1783.1-103991/1/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:

Lian LE. Compressive sensing algorithms with applications to massive MIMO systems. [Thesis]. Hong Kong University of Science and Technology; 2020. Available from: http://repository.ust.hk/ir/Record/1783.1-103991 ; https://doi.org/10.14711/thesis-991012786269503412 ; http://repository.ust.hk/ir/bitstream/1783.1-103991/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

12. Tinarwo, Loyd. Development of methodologies for deploying and implementing local & medium area broadband PLC networks in office and residential electric grids.

Degree: Faculty of Science and Agriculture, 2008, University of Fort Hare

URL: http://hdl.handle.net/10353/83

► The use of electrical networks for telecommunications has a long history. It has been known since the beginning of the twentieth century [Ahola03]. The idea… (more)

▼ The use of electrical networks for telecommunications has a long history. It has been known since the beginning of the twentieth century [Ahola03]. The idea of using electrical networks for broadband communications arose in the 1990s [Hrasnica et al 04]. Recent and growing research interest has indicated that PowerLine Communications (PLC) is the threshold for achieving broadband delivery particularly in very dispersed and low teledensity areas. Currently, there are numerous PLC trials and commercial deployments underway inside and outside South Africa. Nevertheless, these PLC deployments are very isolated, done without clear methodology and performance remains bound to the physical layout of the electrical network. Because of that high bandwidth broadband PLC systems are prone to poor performance and this in turn limits the acceptance and deployment of this emerging alternative broadband technology. Though, PLC technical challenges are being addressed, there has been little analysis and research work that is focused on the “Development of Methodologies for Deploying and Implementing Local & Medium Area Broadband Power Line in Residential and Office Electric Grids” that would lead to broadband PLC being adopted and be of greater use to non-broadband communities of South Africa. PLC is a term describing several different systems using electrical grid distribution wires for simultaneous distribution of data by superimposing an analog signal [Hrasnica et al 04]. The research proposed and presented broadband PLC methodologies for typical medium voltage and local voltage PLC networks. These methodologieswere implemented and experimented with in configurations which closely mirrored residential and office settings through laboratory and multibuilding experiments using commercial 2nd Generation Mitsubishi Electric PLC technology. Research results presented not only serve to provide insight into broadband PLC but also how it handled broadband applications (communications), competed and compared with other technologies such as Ethernet LAN. In combination with networking communication theories, the research explored and analyzed the extent of PLC in providing broadband communication to residential and office electric grids at the University Fort Hare, Computer Science Department. Advisors/Committee Members: Prof. Muyingi, H. N.

Subjects/Keywords: Broadband communication systems; Power transmission; Telecommunication lines

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APA (6^th Edition):

Tinarwo, L. (2008). Development of methodologies for deploying and implementing local & medium area broadband PLC networks in office and residential electric grids. (Thesis). University of Fort Hare. Retrieved from http://hdl.handle.net/10353/83

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Tinarwo, Loyd. “Development of methodologies for deploying and implementing local & medium area broadband PLC networks in office and residential electric grids.” 2008. Thesis, University of Fort Hare. Accessed February 27, 2021. http://hdl.handle.net/10353/83.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Tinarwo, Loyd. “Development of methodologies for deploying and implementing local & medium area broadband PLC networks in office and residential electric grids.” 2008. Web. 27 Feb 2021.

Vancouver:

Tinarwo L. Development of methodologies for deploying and implementing local & medium area broadband PLC networks in office and residential electric grids. [Internet] [Thesis]. University of Fort Hare; 2008. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10353/83.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Tinarwo L. Development of methodologies for deploying and implementing local & medium area broadband PLC networks in office and residential electric grids. [Thesis]. University of Fort Hare; 2008. Available from: http://hdl.handle.net/10353/83

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Johannesburg

13. Stielau, Dieter Ewald. Conductive structures for combined power and information transmission.

Degree: 2014, University of Johannesburg

URL: http://hdl.handle.net/10210/11979

►

M.Ing. (Electrical Engineering Science)

In today's rapidly changing technological environment, more and more importance is being attached to producing products as small as possible to… (more)

▼

M.Ing. (Electrical Engineering Science)

In today's rapidly changing technological environment, more and more importance is being attached to producing products as small as possible to save space as well as materials. Systems today use a wide range of signals, from those used to transmit energy, to small signal electronic signals used for control purposes. As these signals are not very compatible, they must each have their own cable harness to prevent unwanted interference between the signals. As a first step to reducing system size, the control signals (or any signal containing information) may be transmitted on the power transmission line, using techniques investigated in this dissertation. Systems using the same conductors for simultaneous energy and data transmission have many applications ranging from high tech systems to low cost rural communication. Examples of systems where this technology can be applied include: (a) distributed high frequency power systems, where switching of remote equipment can be done from a central point; (b) communication and control in harsh environments such as mining complexes, where switching of fans and motors for example can be done from a central point, while a communication network can be established by placing the information signals on the power cables; and (c) flexible manufacturing cells, where robots can be controlled via the power transmission harness. On the other hand, rural communication systems can be realised over the 50 Hz utility transmission network in remote areas. Such a system has the advantage of offering a low cost solution to providing access to communication to a large number of people spread over a large area. The work described In this dissertation covers two systems, firstly information transmission over the 50 Hz utility network and secondly, the design of a high frequency distributed power system utilising simultaneous information transmission on the transmission line.The first three chapters give an introduction to the technology and discuss the theory which must be applied to make simultaneous energy and information transmission over one conductor viable. Chapter 4 discusses the 50 Hz utility network as an information distribution network. The advantages and disadvantages are discussed, while some solutions are proposed how the disadvantages can be overcome. Chapter 5 discusses a high frequency distributed power system using simultaneous information transmission. The converter design is discussed, while some special design considerations are given which are essential to successful simultaneous information transmission in such a distributed system. To help with the design of the converter used, a simulation was carried out to predict the voltage and current waveforms in such a converter, the results of which can be seen in Appendix B.. The aim of simultaneously transmitting energy and information on the same transmission line was realised in both cases. In the 50 Hz system it was shown that adding external networks to guide the information carrier…

Subjects/Keywords: Information networks; Telecommunication lines; Data transmission systems

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Stielau, D. E. (2014). Conductive structures for combined power and information transmission. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/11979

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Stielau, Dieter Ewald. “Conductive structures for combined power and information transmission.” 2014. Thesis, University of Johannesburg. Accessed February 27, 2021. http://hdl.handle.net/10210/11979.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Stielau, Dieter Ewald. “Conductive structures for combined power and information transmission.” 2014. Web. 27 Feb 2021.

Vancouver:

Stielau DE. Conductive structures for combined power and information transmission. [Internet] [Thesis]. University of Johannesburg; 2014. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10210/11979.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Stielau DE. Conductive structures for combined power and information transmission. [Thesis]. University of Johannesburg; 2014. Available from: http://hdl.handle.net/10210/11979

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Nelson Mandela Metropolitan University

14. [No author]. Fibre optic network supporting high speed transmission in the square kilometre array, South Africa.

Degree: Faculty of Science, 2015, Nelson Mandela Metropolitan University

URL: http://hdl.handle.net/10948/6552

► This thesis provides in-depth information on the high speed optical transport requirements for the Square Kilometre Array. The stringent data rates as well as timing… (more)

▼ This thesis provides in-depth information on the high speed optical transport requirements for the Square Kilometre Array. The stringent data rates as well as timing and synchronization requirements are dealt with respect to the optical fibre technology. Regarding the data transport, we draw a clear comparison between a typical telecommunication access network and a telescope network. Invoking simulations and experiments on the field and laboratory test bed, we successfully implement a suitable telescope network using vertical cavity surface emitting laser (VCSEL) technology. Polarization effects on the KAT-7 telescope network, an operational prototype for the SKA is studied so as to estimate the expected effect in the MeerKAT telescope with transmission distances _ 12 km. The study further relates the obtained values to the expected impact on the distribution of the time and frequency reference in the MeerKAT array. Clock stability depends on the differential group delay (DGD) and polarization stability. On a 10:25 km link that includes the riser cable a DGD of 62:1 fs was attained. This corresponds to a polarization mode dispersion (PMD) coefficient of 19:4 fs=km1=2. This is a low PMD value considering telecommunication network. The PMD value is within the allowed budget in the telescope network. However, this may not be the case at longer baselines extending to over 1000 km as expected in SKA 2. The fibre's deployment contribution to the DGD is measured by comparing the deployed fibre to the undeployed of equal lengths. On the 10:25 km deployed single mode fibre, the maximum and mean DGDs measured were 217:7 fs and 84:8 fs respectively. The undeployed fibre of similar type and equal length, gave a maximum and minimum DGDs of 58:6 fs and 36:3 fs respectively. The deployment is seen to increase the maximum and minimum DGDs by factors of 3.7 and 2.3 respectively. This implies that fibre deployment is very critical in ensuring the birefringence is minimized. Polarization fluctuation recorded a maximum of 180o during the 15 hour real time astronomer use of the antenna. To ascertain the contribution of the riser cable, state of polarization (SOP) of the buried section of the single mode fibre in the link was established. A maximum SOP change of 14o over 15 hour monitoring was measured. From the stability realized on the buried section of the fibre, the change in polarization is contributed by the riser cable. The fluctuation in polarization can cause the phase of a clock signal to drift between the birefringent axes by an equal amount corresponding to DGD. We experimentally demonstrate how polarization stabilization can be attained using the polarization maintaining fibre. We also demonstrate the applicability of VCSEL technology in the SKA unidirectional data flow especially for shorter baselines < 100 km. The VCSEL is a low cost light source with attractive advantages such as low power consumption, high speed capabilities and wavelength tuneability. This work entails the use of traditional amplitude modulation…

Subjects/Keywords: Optical communications; Fiber optics; Telecommunication systems

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APA (6^th Edition):

author], [. (2015). Fibre optic network supporting high speed transmission in the square kilometre array, South Africa. (Thesis). Nelson Mandela Metropolitan University. Retrieved from http://hdl.handle.net/10948/6552

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

author], [No. “Fibre optic network supporting high speed transmission in the square kilometre array, South Africa.” 2015. Thesis, Nelson Mandela Metropolitan University. Accessed February 27, 2021. http://hdl.handle.net/10948/6552.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

author], [No. “Fibre optic network supporting high speed transmission in the square kilometre array, South Africa.” 2015. Web. 27 Feb 2021.

Vancouver:

author] [. Fibre optic network supporting high speed transmission in the square kilometre array, South Africa. [Internet] [Thesis]. Nelson Mandela Metropolitan University; 2015. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10948/6552.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

author] [. Fibre optic network supporting high speed transmission in the square kilometre array, South Africa. [Thesis]. Nelson Mandela Metropolitan University; 2015. Available from: http://hdl.handle.net/10948/6552

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Johannesburg

15. Gildenhuys, Burgert. Error monitoring for leased line data communication services.

Degree: 2014, University of Johannesburg

URL: http://hdl.handle.net/10210/9162

►

M.Ing. (Electrical & Electronic Engineering)

This thesis investigates the problems associated with providing end to end in-service performance monitoring on leased line data networks. These… (more)

Subjects/Keywords: Error-correcting codes (Information theory); Telecommunication systems - South Africa; Telecommunication systems - Technological innovations

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APA (6^th Edition):

Gildenhuys, B. (2014). Error monitoring for leased line data communication services. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/9162

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gildenhuys, Burgert. “Error monitoring for leased line data communication services.” 2014. Thesis, University of Johannesburg. Accessed February 27, 2021. http://hdl.handle.net/10210/9162.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gildenhuys, Burgert. “Error monitoring for leased line data communication services.” 2014. Web. 27 Feb 2021.

Vancouver:

Gildenhuys B. Error monitoring for leased line data communication services. [Internet] [Thesis]. University of Johannesburg; 2014. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10210/9162.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gildenhuys B. Error monitoring for leased line data communication services. [Thesis]. University of Johannesburg; 2014. Available from: http://hdl.handle.net/10210/9162

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

16. Cornillet, Nicolas. Convergence des réseaux de télécommunications mobiles et de télédiffusion : modélisation et évaluation des performances d’un réseau hybride LTE/DVB-T2 : Convergence of broadcastand mobile broadband : modeling and performance evaluation of a LTE/DVB-T2 hybrid network.

Degree: Docteur es, Electronique et télécommunications, 2013, Rennes, INSA

URL: http://www.theses.fr/2013ISAR0034

► Ces dernières années, la popularité croissante de terminaux mobiles de plus en plus intelligents a provoqué une hausse considérable du trafic supporté par les réseaux… (more)

▼ Ces dernières années, la popularité croissante de terminaux mobiles de plus en plus intelligents a provoqué une hausse considérable du trafic supporté par les réseaux de télécommunications cellulaires. Dans ce contexte, le déploiement de réseaux dits de quatrième génération basés sur le standard LTE (Long Term Evolution) et offrant des capacités significativement plus élevées que les réseaux de générations précédentes peut sembler être une solution idéale. Cependant, dans le cas d’un service à délivrer à un très grand nombre d’utilisateurs, ce standard, malgré la disponibilité de la technologie eMBMS (Evolved Multimedia Broadcast Multicast Services), n’est pas forcément le plus adapté. Dans le même temps, la télévision a achevé dans de nombreux pays sa transition vers le numérique. L’abandon de la transmission analogique a permis non seulement d’améliorer la qualité du service mais aussi d’occuper moins de spectre. En France, une partie du spectre libéré a déjà été attribué au déploiement de réseaux LTE. Une autre méthode permettant d’exploiter ce spectre au profit des réseaux de communications mobiles est proposée dans cette thèse : le réseau hybride. Le réseau hybride est constitué d’un réseau cellulaire au standard LTE accompagné d’un émetteur DVB-T2 (Digital Video Broadcasting – Second Generation Terrestrial). Les aires de couverture de ces deux composantes se superposent et un service peut être transmis aux utilisateurs présents dans ces aires indifféremment par l’une ou l’autre des composantes. Ce concept permet de pallier un point faible du standard LTE, c’està- dire la capacité à délivrer efficacement un même service à un grand nombre d’utilisateurs simultanément. Après une étude approfondie des deux standards utilisés, un modèle mathématique du réseau hybride est proposé. Ce modèle se base sur les propriétés géométriques du réseau hybride, les performances des deux types de signaux utilisés, et sur plusieurs types de répartition des utilisateurs pour évaluer les performances du réseau hybride selon différents critères. Le premier critère étudié est un critère énergétique. Le modèle proposé permet de comparer les efficacités énergétiques des deux composantes pour transmettre un service en fonction de son nombre d’utilisateurs. L’efficacité de la composante DVBT2 dépasse celle de la composante LTE à partir d’un seuil dont la valeur varie avec les propriétés géométriques du réseau et le type d’affaiblissement de propagation auquel sont soumis les signaux. Il est de plus possible, dans certaines circonstances, d’améliorer encore l’efficacité énergétique du système en utilisant conjointement les deux composantes. Le second critère étudié est celui de l’encombrement du réseau cellulaire. En effet, un service consommé par un grand nombre d’utilisateurs peut avoir un impact conséquent sur le trafic à transmettre par un réseau LTE. Utiliser la composante DVB-T2 pour distribuer un tel service permet de réduire la charge du réseau cellulaire, et ceci même dans le cas où la composante DVB-T2 ne couvre pas l’ensemble de… Advisors/Committee Members: Hélard, Jean-François (thesis director).

Subjects/Keywords: DVB-T2; Réseaux hybrides; Wire broadcasting; Network performance (Telecommunication); Convergence (Telecommunication); Mobile communication systems; 621.38

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Cornillet, N. (2013). Convergence des réseaux de télécommunications mobiles et de télédiffusion : modélisation et évaluation des performances d’un réseau hybride LTE/DVB-T2 : Convergence of broadcastand mobile broadband : modeling and performance evaluation of a LTE/DVB-T2 hybrid network. (Doctoral Dissertation). Rennes, INSA. Retrieved from http://www.theses.fr/2013ISAR0034

Chicago Manual of Style (16^th Edition):

Cornillet, Nicolas. “Convergence des réseaux de télécommunications mobiles et de télédiffusion : modélisation et évaluation des performances d’un réseau hybride LTE/DVB-T2 : Convergence of broadcastand mobile broadband : modeling and performance evaluation of a LTE/DVB-T2 hybrid network.” 2013. Doctoral Dissertation, Rennes, INSA. Accessed February 27, 2021. http://www.theses.fr/2013ISAR0034.

MLA Handbook (7^th Edition):

Cornillet, Nicolas. “Convergence des réseaux de télécommunications mobiles et de télédiffusion : modélisation et évaluation des performances d’un réseau hybride LTE/DVB-T2 : Convergence of broadcastand mobile broadband : modeling and performance evaluation of a LTE/DVB-T2 hybrid network.” 2013. Web. 27 Feb 2021.

Vancouver:

Cornillet N. Convergence des réseaux de télécommunications mobiles et de télédiffusion : modélisation et évaluation des performances d’un réseau hybride LTE/DVB-T2 : Convergence of broadcastand mobile broadband : modeling and performance evaluation of a LTE/DVB-T2 hybrid network. [Internet] [Doctoral dissertation]. Rennes, INSA; 2013. [cited 2021 Feb 27]. Available from: http://www.theses.fr/2013ISAR0034.

Council of Science Editors:

Cornillet N. Convergence des réseaux de télécommunications mobiles et de télédiffusion : modélisation et évaluation des performances d’un réseau hybride LTE/DVB-T2 : Convergence of broadcastand mobile broadband : modeling and performance evaluation of a LTE/DVB-T2 hybrid network. [Doctoral Dissertation]. Rennes, INSA; 2013. Available from: http://www.theses.fr/2013ISAR0034

Florida Atlantic University

17. Yassin, Raef Rashad. Information-theoretics based technoeconomic growth models: simulation and computation of forecasting in telecommunication services.

Degree: PhD, 2012, Florida Atlantic University

URL: http://purl.flvc.org/FAU/3356898

►

Summary: This research is concerned with algorithmic representation of technoeconomic growth concerning modern and next-generation telecommunications including the Internet service. The goal of this study… (more)

Subjects/Keywords: Signal theory (Telecommunication); Data compression (Computer science); Telecommunication systems – Mathematical models; Information science

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APA (6^th Edition):

Yassin, R. R. (2012). Information-theoretics based technoeconomic growth models: simulation and computation of forecasting in telecommunication services. (Doctoral Dissertation). Florida Atlantic University. Retrieved from http://purl.flvc.org/FAU/3356898

Chicago Manual of Style (16^th Edition):

Yassin, Raef Rashad. “Information-theoretics based technoeconomic growth models: simulation and computation of forecasting in telecommunication services.” 2012. Doctoral Dissertation, Florida Atlantic University. Accessed February 27, 2021. http://purl.flvc.org/FAU/3356898.

MLA Handbook (7^th Edition):

Yassin, Raef Rashad. “Information-theoretics based technoeconomic growth models: simulation and computation of forecasting in telecommunication services.” 2012. Web. 27 Feb 2021.

Vancouver:

Yassin RR. Information-theoretics based technoeconomic growth models: simulation and computation of forecasting in telecommunication services. [Internet] [Doctoral dissertation]. Florida Atlantic University; 2012. [cited 2021 Feb 27]. Available from: http://purl.flvc.org/FAU/3356898.

Council of Science Editors:

Yassin RR. Information-theoretics based technoeconomic growth models: simulation and computation of forecasting in telecommunication services. [Doctoral Dissertation]. Florida Atlantic University; 2012. Available from: http://purl.flvc.org/FAU/3356898

Hong Kong University of Science and Technology

18. Ren, Xiaoqiang ECE. Constrained remote state estimation and quickest change detection.

Degree: 2016, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-88915 ; https://doi.org/10.14711/thesis-b1626263 ; http://repository.ust.hk/ir/bitstream/1783.1-88915/1/th_redirect.html

► Constrained remote state estimation and quickest change detection in the context of Cyber-physical systems are studied in this thesis. The remote state estimation is studied… (more)

▼ Constrained remote state estimation and quickest change detection in the context of Cyber-physical systems are studied in this thesis. The remote state estimation is studied from the perspective of both an estimator and an attacker. Three different problems are formulated, and the common theme is twofold: (i): The resources for the estimator/attacker/decision maker are limited, and efficient resources utilization policies are thus necessary. (ii): In each proposed (optimal) policy, decisions are made sequentially with real-time information. In the remote estimation from the estimator's perspective problem, a sensor observes a dynamic process and sends its observations to a remote estimator over a wireless fading channel characterized by a time-homogeneous Markov chain. The successful transmission probability depends on both the channel gains and the transmission power used by the sensor. Jointly optimal transmission power controller and remote estimator, which minimize an infinite-horizon cost consisting of the power usage and the remote estimation error, are presented by formulating the problem as a partially observable Markov decision process (POMDP). Structural results are provided using the majorization theory when the monitored dynamic system is scalar. The remote estimation from the attacker's perspective is studied in multi-systems scenarios. Suppose there are M independent systems, each of which has a remote sensor monitoring the system and sending its local estimates to a fusion center over a packet-dropping channel. An attacker may generate noises to exacerbate the communication channels between sensors and the fusion center. Due to capacity limitation, at each time the attacker can exacerbate at most N of the M channels. The optimal attack policy, which maximizes the estimation error at the fusion center, is solved as a solution to a Markov decision process (MDP), of which a threshold structure is proved. To overcome the curse of dimensionality of MDP algorithms, we further provide an asymptotically optimal (as M and N go to infinity) policy, which is easy to compute and implement. The quickest change detection problem is to detect an abrupt change event as quickly as possible subject to constraints on false detection. Unlike the classical problem, where the decision maker can access only one sequence of observations, in this thesis work, the decision maker chooses one of two different sequences of observations at each time instant. The information quality and sampling cost of the two sequences of observations are different. We present an asymptotically optimal joint design of observation scheduling policy and stopping time such that the detection delay is minimized subject to constraints on both average run length to false alarm and average cost per sample. The decentralized case in a multi-channel setting is also studied.

Subjects/Keywords: Cooperating objects (Computer systems) ; Reliability ; Mathematical models ; Telecommunication systems ; Estimation theory

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APA (6^th Edition):

Ren, X. E. (2016). Constrained remote state estimation and quickest change detection. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-88915 ; https://doi.org/10.14711/thesis-b1626263 ; http://repository.ust.hk/ir/bitstream/1783.1-88915/1/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 (16^th Edition):

Ren, Xiaoqiang ECE. “Constrained remote state estimation and quickest change detection.” 2016. Thesis, Hong Kong University of Science and Technology. Accessed February 27, 2021. http://repository.ust.hk/ir/Record/1783.1-88915 ; https://doi.org/10.14711/thesis-b1626263 ; http://repository.ust.hk/ir/bitstream/1783.1-88915/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ren, Xiaoqiang ECE. “Constrained remote state estimation and quickest change detection.” 2016. Web. 27 Feb 2021.

Vancouver:

Ren XE. Constrained remote state estimation and quickest change detection. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2016. [cited 2021 Feb 27]. Available from: http://repository.ust.hk/ir/Record/1783.1-88915 ; https://doi.org/10.14711/thesis-b1626263 ; http://repository.ust.hk/ir/bitstream/1783.1-88915/1/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:

Ren XE. Constrained remote state estimation and quickest change detection. [Thesis]. Hong Kong University of Science and Technology; 2016. Available from: http://repository.ust.hk/ir/Record/1783.1-88915 ; https://doi.org/10.14711/thesis-b1626263 ; http://repository.ust.hk/ir/bitstream/1783.1-88915/1/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

19. Lor, Felix Wing Keung. Neural routing in circuit-switched networks.

Degree: 1995, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-5319 ; https://doi.org/10.14711/thesis-b482903 ; http://repository.ust.hk/ir/bitstream/1783.1-5319/1/th_redirect.html

► The goal of routing in a telecommunications network is to distribute user traffic from in a network of sources and destinations in accordance with the… (more)

▼ The goal of routing in a telecommunications network is to distribute user traffic from in a network of sources and destinations in accordance with the traffic's service requirements and subject to the network's resource restriction. Objectives of routing scheme include maximizing the network performance, such as larger carried load, fewer blockings and fewer crankbacks, while minimizing the cost, such as fewer trunk groups and fewer intermediate tandems. Constraints are imposed by the limitations of trunk resources, user traffic, and the network services provided and user services requested. Mean field and Monte Carlo computer simlutaions programmes are built according to the queueing theory and telecommunication engineering theory. Several traffic processes, such as blockings, crankback and overflow, and a variety of traffic profiles, topologies and structures are under investigation. We also develop a new software package TNSP (Telecom Network Simulation Package) to simulate various traffic conditions of East Kowloon telephone network of Hong Kong. As the network technologies evolve, enhanced routing methods are required to meet the dramatic demand of the growth of telecommunications services. We in-vent a new adaptive and efficient routing technique called Neural Routing to tackle this stochastic and nonlinear optimization problem. We use a simplex-based central-ized algorithm to dynamically distribute telephonic traffic among alternate routes in circuit-switched networks according to the fluctuating number of free circuits and the evolving call attempts. It gives an excellent network performance especially in asymmetric traffic conditions and uneven network configurations. We apply it to gen-erate examples for training localized Neural controllers. Simulations show that the decentralized Neural approach has a significant improvement in blocking probability with Maximum Free Circuit (MFC) which forms the basis of AT&T's Real-Time Net-work Routing (RTNR) and gives a surpassing performance in crankback percentage especially for an unbalanced configuration network with uneven traffic profile.

Subjects/Keywords: Telecommunication – Switching systems ; Telecommunication – Traffic ; Telephone systems ; Queuing theory

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APA (6^th Edition):

Lor, F. W. K. (1995). Neural routing in circuit-switched networks. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-5319 ; https://doi.org/10.14711/thesis-b482903 ; http://repository.ust.hk/ir/bitstream/1783.1-5319/1/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 (16^th Edition):

Lor, Felix Wing Keung. “Neural routing in circuit-switched networks.” 1995. Thesis, Hong Kong University of Science and Technology. Accessed February 27, 2021. http://repository.ust.hk/ir/Record/1783.1-5319 ; https://doi.org/10.14711/thesis-b482903 ; http://repository.ust.hk/ir/bitstream/1783.1-5319/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lor, Felix Wing Keung. “Neural routing in circuit-switched networks.” 1995. Web. 27 Feb 2021.

Vancouver:

Lor FWK. Neural routing in circuit-switched networks. [Internet] [Thesis]. Hong Kong University of Science and Technology; 1995. [cited 2021 Feb 27]. Available from: http://repository.ust.hk/ir/Record/1783.1-5319 ; https://doi.org/10.14711/thesis-b482903 ; http://repository.ust.hk/ir/bitstream/1783.1-5319/1/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:

Lor FWK. Neural routing in circuit-switched networks. [Thesis]. Hong Kong University of Science and Technology; 1995. Available from: http://repository.ust.hk/ir/Record/1783.1-5319 ; https://doi.org/10.14711/thesis-b482903 ; http://repository.ust.hk/ir/bitstream/1783.1-5319/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Alberta

20. Grover, Wayne D. Selfhealing networks: a distributed algorithm for k-shortest link-disjoint paths in a multi-graph with applications in real time network restoration.

Degree: PhD, Department of Electrical Engineering, 1989, University of Alberta

URL: https://era.library.ualberta.ca/files/g158bk240

Subjects/Keywords: Telecommunication systems – Design.; Optical fibers.

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APA (6^th Edition):

Grover, W. D. (1989). Selfhealing networks: a distributed algorithm for k-shortest link-disjoint paths in a multi-graph with applications in real time network restoration. (Doctoral Dissertation). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/g158bk240

Chicago Manual of Style (16^th Edition):

Grover, Wayne D. “Selfhealing networks: a distributed algorithm for k-shortest link-disjoint paths in a multi-graph with applications in real time network restoration.” 1989. Doctoral Dissertation, University of Alberta. Accessed February 27, 2021. https://era.library.ualberta.ca/files/g158bk240.

MLA Handbook (7^th Edition):

Grover, Wayne D. “Selfhealing networks: a distributed algorithm for k-shortest link-disjoint paths in a multi-graph with applications in real time network restoration.” 1989. Web. 27 Feb 2021.

Vancouver:

Grover WD. Selfhealing networks: a distributed algorithm for k-shortest link-disjoint paths in a multi-graph with applications in real time network restoration. [Internet] [Doctoral dissertation]. University of Alberta; 1989. [cited 2021 Feb 27]. Available from: https://era.library.ualberta.ca/files/g158bk240.

Council of Science Editors:

Grover WD. Selfhealing networks: a distributed algorithm for k-shortest link-disjoint paths in a multi-graph with applications in real time network restoration. [Doctoral Dissertation]. University of Alberta; 1989. Available from: https://era.library.ualberta.ca/files/g158bk240

University of Alberta

21. Fair, Ivan J. Guided scrambling: a new line coding technique for optical fiber communication systems.

Degree: MS, Department of Electrical Engineering, 1989, University of Alberta

URL: https://era.library.ualberta.ca/files/ng451k64z

Subjects/Keywords: Scrambling systems (Telecommunication); Optical communications.

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APA (6^th Edition):

Fair, I. J. (1989). Guided scrambling: a new line coding technique for optical fiber communication systems. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/ng451k64z

Chicago Manual of Style (16^th Edition):

Fair, Ivan J. “Guided scrambling: a new line coding technique for optical fiber communication systems.” 1989. Masters Thesis, University of Alberta. Accessed February 27, 2021. https://era.library.ualberta.ca/files/ng451k64z.

MLA Handbook (7^th Edition):

Fair, Ivan J. “Guided scrambling: a new line coding technique for optical fiber communication systems.” 1989. Web. 27 Feb 2021.

Vancouver:

Fair IJ. Guided scrambling: a new line coding technique for optical fiber communication systems. [Internet] [Masters thesis]. University of Alberta; 1989. [cited 2021 Feb 27]. Available from: https://era.library.ualberta.ca/files/ng451k64z.

Council of Science Editors:

Fair IJ. Guided scrambling: a new line coding technique for optical fiber communication systems. [Masters Thesis]. University of Alberta; 1989. Available from: https://era.library.ualberta.ca/files/ng451k64z

Nelson Mandela Metropolitan University

22. Barlow, Sherwin Riaan. Using an intelligent self-service solution to support telecommunication service provisioning.

Degree: Faculty of Science, 2012, Nelson Mandela Metropolitan University

URL: http://hdl.handle.net/10948/d1013417

► The increasing competition between telecommunication service providers (TSPs) and the large amounts of human resource costs incurred to provision telecommunication services to small, medium and… (more)

▼ The increasing competition between telecommunication service providers (TSPs) and the large amounts of human resource costs incurred to provision telecommunication services to small, medium and micro enterprises (SMMEs), highlight the need for effective self-service provisioning methods to reduce costs. Existing service provisioning methods do not effectively support SMMEs in the service provisioning process. The current methods used are manual and Web-based. The manual service provisioning method is labour and time-intensive. TSPs are being forced to cut human resource costs as the profit margins for provisioning services are narrow due to competition. The current web-based systems do not allow SMMEs to effectively purchase services as they provide long textual lists to consult and limited information about services. The objective of this research was to develop an intelligent web-based self-service system to support SMMEs in telecommunication service provisioning, using a Design Science Research methodology. A constraint-based, knowledge-based recommender system was selected as the most appropriate intelligent system to support telecommunication service provisioning. A prototype called SelPro was developed as a solution to address the shortcomings of the current ineffective service provisioning methods available for SMMEs. SelPro incorporates an interactive wizard-style user interface with dynamic recommendations to support novice users as well as an expert interface which provides less user support. An expert review and a user study were conducted to determine if SelPro was usable, useful and effective. SelPro was perceived as being usable for SMMEs wishing to purchase telecommunication services. Expert participants were satisfied with the usability of SelPro and perceived it as being useful, easy to use and easy to learn. SelPro was considered effective because of the high task success ratings provided by the participants using the two interfaces. The research determined that intelligent web-based self-service provisioning can be used to effectively support SMMEs in telecommunication service provisioning. General design recommendations for similar systems were proposed and future work will involve using intelligent systems to support large enterprises in telecommunication service provisioning.

Subjects/Keywords: Telecommunication systems – Management; Electronic commerce – Computer programs; Web applications

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APA (6^th Edition):

Barlow, S. R. (2012). Using an intelligent self-service solution to support telecommunication service provisioning. (Thesis). Nelson Mandela Metropolitan University. Retrieved from http://hdl.handle.net/10948/d1013417

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Barlow, Sherwin Riaan. “Using an intelligent self-service solution to support telecommunication service provisioning.” 2012. Thesis, Nelson Mandela Metropolitan University. Accessed February 27, 2021. http://hdl.handle.net/10948/d1013417.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Barlow, Sherwin Riaan. “Using an intelligent self-service solution to support telecommunication service provisioning.” 2012. Web. 27 Feb 2021.

Vancouver:

Barlow SR. Using an intelligent self-service solution to support telecommunication service provisioning. [Internet] [Thesis]. Nelson Mandela Metropolitan University; 2012. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10948/d1013417.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Barlow SR. Using an intelligent self-service solution to support telecommunication service provisioning. [Thesis]. Nelson Mandela Metropolitan University; 2012. Available from: http://hdl.handle.net/10948/d1013417

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Nelson Mandela Metropolitan University

23. Van Eeden, Johannes Jurie. A SOAP-based Model for secure messaging in a global context.

Degree: MTech, Faculty of Engineering, the Built Environment and Information Technology, 2005, Nelson Mandela Metropolitan University

URL: http://hdl.handle.net/10948/817

► For integration between application-systems in a global context, interoperability needs to be established on a global level; global interoperability, in turn, is based on a… (more)

Subjects/Keywords: Telecommunication systems – Security measures

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APA (6^th Edition):

Van Eeden, J. J. (2005). A SOAP-based Model for secure messaging in a global context. (Masters Thesis). Nelson Mandela Metropolitan University. Retrieved from http://hdl.handle.net/10948/817

Chicago Manual of Style (16^th Edition):

Van Eeden, Johannes Jurie. “A SOAP-based Model for secure messaging in a global context.” 2005. Masters Thesis, Nelson Mandela Metropolitan University. Accessed February 27, 2021. http://hdl.handle.net/10948/817.

MLA Handbook (7^th Edition):

Van Eeden, Johannes Jurie. “A SOAP-based Model for secure messaging in a global context.” 2005. Web. 27 Feb 2021.

Vancouver:

Van Eeden JJ. A SOAP-based Model for secure messaging in a global context. [Internet] [Masters thesis]. Nelson Mandela Metropolitan University; 2005. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10948/817.

Council of Science Editors:

Van Eeden JJ. A SOAP-based Model for secure messaging in a global context. [Masters Thesis]. Nelson Mandela Metropolitan University; 2005. Available from: http://hdl.handle.net/10948/817

Nelson Mandela Metropolitan University

24. Ntsiko, Blondie Bonisa Blossom. The use of e-mail among students and lecturers at Nelson Mandela Metropolitan University : a guide reasearch report.

Degree: MA, Faculty of Business and Economic Sciences, 2011, Nelson Mandela Metropolitan University

URL: http://hdl.handle.net/10948/d1015970

► This research seeks to determine the impact of the use of e-mail between lecturers and students at the NMMU. New students at universities, and especially… (more)

Subjects/Keywords: Telecommunication in education; Educational technology; Electronic mail systems in education

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APA (6^th Edition):

Ntsiko, B. B. B. (2011). The use of e-mail among students and lecturers at Nelson Mandela Metropolitan University : a guide reasearch report. (Masters Thesis). Nelson Mandela Metropolitan University. Retrieved from http://hdl.handle.net/10948/d1015970

Chicago Manual of Style (16^th Edition):

Ntsiko, Blondie Bonisa Blossom. “The use of e-mail among students and lecturers at Nelson Mandela Metropolitan University : a guide reasearch report.” 2011. Masters Thesis, Nelson Mandela Metropolitan University. Accessed February 27, 2021. http://hdl.handle.net/10948/d1015970.

MLA Handbook (7^th Edition):

Ntsiko, Blondie Bonisa Blossom. “The use of e-mail among students and lecturers at Nelson Mandela Metropolitan University : a guide reasearch report.” 2011. Web. 27 Feb 2021.

Vancouver:

Ntsiko BBB. The use of e-mail among students and lecturers at Nelson Mandela Metropolitan University : a guide reasearch report. [Internet] [Masters thesis]. Nelson Mandela Metropolitan University; 2011. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10948/d1015970.

Council of Science Editors:

Ntsiko BBB. The use of e-mail among students and lecturers at Nelson Mandela Metropolitan University : a guide reasearch report. [Masters Thesis]. Nelson Mandela Metropolitan University; 2011. Available from: http://hdl.handle.net/10948/d1015970

25. Steeb, Jan-Willem W. Localization and ,litigation of radio frequency interference for interferometric arrays.

Degree: PhD, Electrical and Electronic Engineering, 2018, Stellenbosch University

URL: http://hdl.handle.net/10019.1/104989

►

ENGLISH ABSTRACT: Radio telescopes have increased exponentially in sensitivity ever since the first single dish radio telescopes were built in the 1930's. This trend continues… (more)

▼

ENGLISH ABSTRACT: Radio telescopes have increased exponentially in sensitivity ever since the first single dish radio telescopes were built in the 1930's. This trend continues with the development of next generation telescopes such as the Square Kilometre Array (SKA). Parallel to the development of radio telescopes, has been the rapid expansion of telecommunication technologies. Consequently, radio telescopes are becoming more sensitive in an environment with ever increasing radio frequency interference (RFI). The ideal solution to RFI that is detected by a radio telescope is to locate its source and then have it removed. Removal of the source is usually only possible if it is occurring in a protected band or the radio telescope is in a radio quiet zone. Unfortunately, most of the radio spectrum has been allocated to active communication services and not all radio telescopes are in radio quiet zones. The alternative is to mitigate its effect using methods such as spatial RFI mitigation. The contributions of this PhD dissertation are twofold: firstly, a source localization algorithm that takes into account the constraints and advantages of the arrays used for radio astronomy has been developed; and secondly, existing spatial RFI mitigation techniques have been adapted to take into account the bandwidth of the RFI signals. The computationally efficient localization algorithm that was developed is best suited for interferometric arrays with low array beam sidelobes. Two variants of the algorithm were developed, one that works for sources in the near-field and the other for far-field sources. In the near-field, the computational complexity of the algorithm is linear with search grid size compared to cubic scaling of the state-of-the-art 3-D MUSIC method. The trade-off is that the proposed algorithm requires a once-off a priori calculation and storing of weighting matrices. In an experiment using a station of the Low Frequency Array (LOFAR) a hexacopter was flown around the array, at a mean radial distance of 190 m, broadcasting a signal. The mean error in distance between the estimated position of the hexacopter and the GPS position of the hexacopter was 2 m for a wavelength of 6.7 m. The non-narrowband RFI mitigation method developed consists of a second order filter that is used to mitigate powerful RFI with bandwidth sufficient to cause aberrations that are below the noise, but with power that competes with the astronomical sources. The second order filter consists of a first order subspace subtraction filter combined with a flat frequency response model for the RFI source. Taking into account mutual coupling as well as a calibration step to account for unknown complex gains, the algorithm was found to process approximately 1.6 times more bandwidth than using just a first order subspace subtraction filter.

AFRIKAANSE OPSOMMING: Sedert die eerste enkelskottel radioteleskope in die 1930's gebou is, het die sensitiwiteit van radioteleskope eksponensieël toegeneem. Hierdie tendens gaan voort met…

Advisors/Committee Members: Davidson, David B., Wijnholds, Stefan J., Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering..

Subjects/Keywords: UCTD; Radio telescopes; Telecommunication systems; Radio frequency interference; Localized waves

12 more images…

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APA (6^th Edition):

Steeb, J. W. (2018). Localization and ,litigation of radio frequency interference for interferometric arrays. (Doctoral Dissertation). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/104989

Chicago Manual of Style (16^th Edition):

Steeb, Jan-Willem W. “Localization and ,litigation of radio frequency interference for interferometric arrays.” 2018. Doctoral Dissertation, Stellenbosch University. Accessed February 27, 2021. http://hdl.handle.net/10019.1/104989.

MLA Handbook (7^th Edition):

Steeb, Jan-Willem W. “Localization and ,litigation of radio frequency interference for interferometric arrays.” 2018. Web. 27 Feb 2021.

Vancouver:

Steeb JW. Localization and ,litigation of radio frequency interference for interferometric arrays. [Internet] [Doctoral dissertation]. Stellenbosch University; 2018. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10019.1/104989.

Council of Science Editors:

Steeb JW. Localization and ,litigation of radio frequency interference for interferometric arrays. [Doctoral Dissertation]. Stellenbosch University; 2018. Available from: http://hdl.handle.net/10019.1/104989

University of Johannesburg

26. Sheri, Ashraf. Wireless LAN receiver with image rejection.

Degree: 2014, University of Johannesburg

URL: http://hdl.handle.net/10210/12155

►

M.Ing. (Electrical And Electronic Engineering)

This dissertation presents a fully integrated image rejection receiver, the design of a wireless local area network receiver, by using… (more)

Subjects/Keywords: Wireless LANs; Wireless communication systems; Network performance (Telecommunication)

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APA (6^th Edition):

Sheri, A. (2014). Wireless LAN receiver with image rejection. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/12155

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sheri, Ashraf. “Wireless LAN receiver with image rejection.” 2014. Thesis, University of Johannesburg. Accessed February 27, 2021. http://hdl.handle.net/10210/12155.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sheri, Ashraf. “Wireless LAN receiver with image rejection.” 2014. Web. 27 Feb 2021.

Vancouver:

Sheri A. Wireless LAN receiver with image rejection. [Internet] [Thesis]. University of Johannesburg; 2014. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10210/12155.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sheri A. Wireless LAN receiver with image rejection. [Thesis]. University of Johannesburg; 2014. Available from: http://hdl.handle.net/10210/12155

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Johannesburg

27. Sanya, Timothy Oluwatobi. Implementation issues for M-ARY FSK on narrowband power line communications.

Degree: 2012, University of Johannesburg

URL: http://hdl.handle.net/10210/5391

►

M.Phil.

The advantages offered by power line communications (hereon after called PLC) cannot be over-emphasized neither can the inherent problems affecting its commercial takeover be… (more)

▼

M.Phil.

The advantages offered by power line communications (hereon after called PLC) cannot be over-emphasized neither can the inherent problems affecting its commercial takeover be underestimated. This research work creates a background study for experimental measurement and eventual implementations on power lines. It explains those salient aspects of commercially available communication modules that are rather not straight forward to understand from reading the Comblocks user manual. Especially, addressing those shortcomings of Comblocks that were not indicated in the documentation, we o er solutions to those we could nd our way around. M-ary frequency shift keying was implemented. This implementation tested the ro- bustness of the scheme against noises, attenuation and other power line channel char- acteristics as encountered practically. Based on our results, we nally recommend an optimal set of frequencies; we believe to be good for use in most PLC application pur- poses. Pseudo random bits of information were generated, encoded and modulated; the signals were transmitted over power line channels. The impact of noise sources, impulse noise especially was observed at di erent distances along the channel. Coupling and decoupling circuits used for this research, with associated issues sur- rounding the use of coupling circuitry are also presented. The CENELEC norm for PLC communication was adhered to, hence only frequencies that fall within the CENELEC speci cation for low voltage power distribution network were considered for MFSK use. Signal-to-noise ratio and other factors that a ect signal transmission over PLC was also measured. A complete communication system comprises of the transmitter, the channel and the receiver. This work however did not cover the receiver part of the system. Future work can now be done on this aspect which amongst others can take care of synchronization issues, in which a coding system as well as bit error rates can be determined.

Subjects/Keywords: Digital communications; Telecommunication systems; Electric lines - Carrier transmission

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APA (6^th Edition):

Sanya, T. O. (2012). Implementation issues for M-ARY FSK on narrowband power line communications. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/5391

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sanya, Timothy Oluwatobi. “Implementation issues for M-ARY FSK on narrowband power line communications.” 2012. Thesis, University of Johannesburg. Accessed February 27, 2021. http://hdl.handle.net/10210/5391.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sanya, Timothy Oluwatobi. “Implementation issues for M-ARY FSK on narrowband power line communications.” 2012. Web. 27 Feb 2021.

Vancouver:

Sanya TO. Implementation issues for M-ARY FSK on narrowband power line communications. [Internet] [Thesis]. University of Johannesburg; 2012. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10210/5391.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sanya TO. Implementation issues for M-ARY FSK on narrowband power line communications. [Thesis]. University of Johannesburg; 2012. Available from: http://hdl.handle.net/10210/5391

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

28. Siddiquee, Intekhaab Aalam. Throughput optimization in retransmission based communication systems.

Degree: Department of Electrical and Computer Engineering, 2018, University of Victoria

URL: https://dspace.library.uvic.ca//handle/1828/9720

► Optimization of throughput, in a channel perturbed by random and burst noise, has been extensively studied. Block coding has been chosen as the type of… (more)

Subjects/Keywords: Mathematical optimization; Telecommunication systems

…3.2 Maximum throughput values for plain ARQ systems............ 35 Figure 3.3 Throughput… …second chapter describes the fundamental concepts of error control in com munication systems… …sequences of discrete symbols. In analog systems, both are continuous functions of time, and in… …mixed system both types exist. In analog systems, no significant effort is made by the… …designer to tailor the signal waveform to suit the channel. In discrete systems, a finite set of…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Siddiquee, I. A. (2018). Throughput optimization in retransmission based communication systems. (Thesis). University of Victoria. Retrieved from https://dspace.library.uvic.ca//handle/1828/9720

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Siddiquee, Intekhaab Aalam. “Throughput optimization in retransmission based communication systems.” 2018. Thesis, University of Victoria. Accessed February 27, 2021. https://dspace.library.uvic.ca//handle/1828/9720.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Siddiquee, Intekhaab Aalam. “Throughput optimization in retransmission based communication systems.” 2018. Web. 27 Feb 2021.

Vancouver:

Siddiquee IA. Throughput optimization in retransmission based communication systems. [Internet] [Thesis]. University of Victoria; 2018. [cited 2021 Feb 27]. Available from: https://dspace.library.uvic.ca//handle/1828/9720.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Siddiquee IA. Throughput optimization in retransmission based communication systems. [Thesis]. University of Victoria; 2018. Available from: https://dspace.library.uvic.ca//handle/1828/9720

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Durban University of Technology

29. Gomba, Ndadzibaya Masimba. Contention and congestion minimization in OBS networks.

Degree: 2017, Durban University of Technology

URL: http://hdl.handle.net/10321/2465

►

Submitted in partial fulfillment for the Masters in Engineering Degree: Electrical Engineering, Department of Electrical Engineering, Durban University of Technology, Durban, South Africa, 2017.

All-optical… (more)

▼

Submitted in partial fulfillment for the Masters in Engineering Degree: Electrical Engineering, Department of Electrical Engineering, Durban University of Technology, Durban, South Africa, 2017.

All-optical networks (AON) based optical burst switching (OBS) promise to be the ultimate backbone network technology solution for next generation( NG) as well as fu ture generation (FG)networks because of their relatively higher resources utilization, great flexibility at lower cost and potential massive bandwidth capacities both at trans mission and switching levels. By design, buffering is not provisioned in interior nodes. End users exchange data with one another through end-to-end light channels, called lightpaths in which wavelength continuity is maintained. In practice, their establish ing, in a cost effective manner remains an inescapable challenge. The routing and wave length assignment (RWA) problem entices successful establishment of a physical route for each lightpath connection request, assigning a wavelength to each route and at the same time ensm·ing end to end continuity, subject to the limited number of wave lengths. The wavelengths must be assigned such that no lightpaths can share the same wavelength simultaneously on a given fibre, or else contentions may occur. Some data bursts may be discarded whenever contention occurs among multiple bursts that arrive simultaneously at any interior node using the same wavelength and are intended for the same output port. Because of the buffer-less nature of OBS networks, conten tion/congestion in the core network can quickly lead to degradation in overall network performance at moderate to high traffic levels due to heavy burst loses. In this disser tation we propose and evaluate a congestion management approach we refer to as '"en hanced congestion management" which gears towards rendering and guaranteeing a consistent QoS as well as rational and fair use of available network links. Simulation results show that the scheme can effectively minimize both contention and congestion and at the same time improving both throughput and effective utilization under mod erate to high network traffic loads

M

Advisors/Committee Members: Nleya, Bakhe.

Subjects/Keywords: Optical communications; Packet switching (Data transmission); Telecommunication – Switching systems

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gomba, N. M. (2017). Contention and congestion minimization in OBS networks. (Thesis). Durban University of Technology. Retrieved from http://hdl.handle.net/10321/2465

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gomba, Ndadzibaya Masimba. “Contention and congestion minimization in OBS networks.” 2017. Thesis, Durban University of Technology. Accessed February 27, 2021. http://hdl.handle.net/10321/2465.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gomba, Ndadzibaya Masimba. “Contention and congestion minimization in OBS networks.” 2017. Web. 27 Feb 2021.

Vancouver:

Gomba NM. Contention and congestion minimization in OBS networks. [Internet] [Thesis]. Durban University of Technology; 2017. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10321/2465.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gomba NM. Contention and congestion minimization in OBS networks. [Thesis]. Durban University of Technology; 2017. Available from: http://hdl.handle.net/10321/2465

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Columbia University

30. Agur, Colin. Second-Order Network Development in India: Mobile Phone Users and the Indian Premier League.

Degree: 2014, Columbia University

URL: https://doi.org/10.7916/D8D50K9J

► This dissertation examines second order network formation on India's large and rapidly expanding mobile phone networks. It does so by examining a particular second order… (more)

Subjects/Keywords: Telecommunication; Wireless communication systems; Communication; Indian Premier League

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Agur, C. (2014). Second-Order Network Development in India: Mobile Phone Users and the Indian Premier League. (Doctoral Dissertation). Columbia University. Retrieved from https://doi.org/10.7916/D8D50K9J

Chicago Manual of Style (16^th Edition):

Agur, Colin. “Second-Order Network Development in India: Mobile Phone Users and the Indian Premier League.” 2014. Doctoral Dissertation, Columbia University. Accessed February 27, 2021. https://doi.org/10.7916/D8D50K9J.

MLA Handbook (7^th Edition):

Agur, Colin. “Second-Order Network Development in India: Mobile Phone Users and the Indian Premier League.” 2014. Web. 27 Feb 2021.

Vancouver:

Agur C. Second-Order Network Development in India: Mobile Phone Users and the Indian Premier League. [Internet] [Doctoral dissertation]. Columbia University; 2014. [cited 2021 Feb 27]. Available from: https://doi.org/10.7916/D8D50K9J.

Council of Science Editors:

Agur C. Second-Order Network Development in India: Mobile Phone Users and the Indian Premier League. [Doctoral Dissertation]. Columbia University; 2014. Available from: https://doi.org/10.7916/D8D50K9J

Open Access Theses and Dissertations