Wireless digital point to multipoint link utilizing wideband CDMA

 

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dc.contributor.advisor Braun, R M en_ZA
dc.contributor.author Ambekar, Sanjay en_ZA
dc.date.accessioned 2016-03-17T07:05:12Z
dc.date.available 2016-03-17T07:05:12Z
dc.date.issued 1998 en_ZA
dc.identifier.citation Ambekar, S. 1998. Wireless digital point to multipoint link utilizing wideband CDMA. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/17856
dc.description.abstract One of the proposed techniques for multiple access communications for the third generation is code division multiple access (CDMA). This has been shown to be a viable alternative to both TDMA and FDMA. While there does not appear to be a single multiple accessing technique that is superior to others in all situations, there are characteristics of CDMA that give it a distinct advantage over the other multiple access techniques. In CDMA each user is provided with an unique, orthogonal code. If these K codes are orthogonal and uncorrelated with each other, than K independent users can transmit at the same time and in the same radio bandwidth. The receivers decorrelate the information and regenerate the original transmitted signal. It must be noted that the term "Wideband CDMA" is used comparatively to the only existing commercial CDMA system, IS-95 which uses a spectral bandwidth of only 1.2288 MHz. This thesis examines and evaluates a good set of orthonormal codes (orthogonal and normalized to have equal power) and their application to providing accessing for a point to multipoint (PMP) stationary system. The correlation properties, design and constellation properties of these codes are investigated. The system model is then simulated using Systemview and then evaluated in terms of it's bit error rate, user capacity and Erlang with addition of users to the system. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Communications Engineering en_ZA
dc.title Wireless digital point to multipoint link utilizing wideband CDMA en_ZA
dc.type Master Thesis
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Engineering and the Built Environment
dc.publisher.department Department of Electrical Engineering en_ZA
dc.type.qualificationlevel Masters
dc.type.qualificationname MSc (Eng) en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Ambekar, S. (1998). <i>Wireless digital point to multipoint link utilizing wideband CDMA</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering. Retrieved from http://hdl.handle.net/11427/17856 en_ZA
dc.identifier.chicagocitation Ambekar, Sanjay. <i>"Wireless digital point to multipoint link utilizing wideband CDMA."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering, 1998. http://hdl.handle.net/11427/17856 en_ZA
dc.identifier.vancouvercitation Ambekar S. Wireless digital point to multipoint link utilizing wideband CDMA. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering, 1998 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/17856 en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Ambekar, Sanjay AB - One of the proposed techniques for multiple access communications for the third generation is code division multiple access (CDMA). This has been shown to be a viable alternative to both TDMA and FDMA. While there does not appear to be a single multiple accessing technique that is superior to others in all situations, there are characteristics of CDMA that give it a distinct advantage over the other multiple access techniques. In CDMA each user is provided with an unique, orthogonal code. If these K codes are orthogonal and uncorrelated with each other, than K independent users can transmit at the same time and in the same radio bandwidth. The receivers decorrelate the information and regenerate the original transmitted signal. It must be noted that the term "Wideband CDMA" is used comparatively to the only existing commercial CDMA system, IS-95 which uses a spectral bandwidth of only 1.2288 MHz. This thesis examines and evaluates a good set of orthonormal codes (orthogonal and normalized to have equal power) and their application to providing accessing for a point to multipoint (PMP) stationary system. The correlation properties, design and constellation properties of these codes are investigated. The system model is then simulated using Systemview and then evaluated in terms of it's bit error rate, user capacity and Erlang with addition of users to the system. DA - 1998 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1998 T1 - Wireless digital point to multipoint link utilizing wideband CDMA TI - Wireless digital point to multipoint link utilizing wideband CDMA UR - http://hdl.handle.net/11427/17856 ER - en_ZA


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