Rate adaptive coding and its application to spread spectrum communications

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dc.contributor.authorYousef Bigloo, Amir Masouden_US
dc.date.accessioned2024-08-15T20:19:57Z
dc.date.available2024-08-15T20:19:57Z
dc.date.copyright1992en_US
dc.date.issued1992
dc.degree.departmentDepartment of Electrical and Computer Engineering
dc.degree.levelMaster of Applied Science M.A.Sc.en
dc.description.abstractIn this work, rate-adaptive coding (RAC) and its application to spread spectrum are investigated. Two RAC schemes are introduced and their performances are analyzed. The first one is based on punctured maximum distance separable (MDS) codes. For this scheme, the throughput and codeword error probability verses the code symbol error probability are derived. The performance of this protocol is also analyzed in a Rayleigh fading environment, with the maximum number of transmissions for each codeword limited. The second scheme is based on the concatenation of punctured MDS codes, and convolutional codes. This concatenation benefits from the advantages of both block and convolutional codes. The throughput and codeword error probability in a Rayleigh fading environment with a limited number of transmissions for each codeword are derived. Since spread spectrum multiple access (SSMA) is a self-interference limited sys­tem, any reduction in the interference converts directly into an increase in capacity, in terms of the number of simultaneous users [l]. The interference from each user is reduced by applying RAC to SSMA, thereby superseding the conventional fixed­-rate system. Specifically, the RAC scheme based on MDS codes is applied to the frequency hopped spread spectrum multiple access (FH/SSMA) and a remarkable increase in the capacity of the system is shown.
dc.format.extent82 pages
dc.identifier.urihttps://hdl.handle.net/1828/20245
dc.rightsAvailable to the World Wide Weben_US
dc.titleRate adaptive coding and its application to spread spectrum communicationsen_US
dc.typeThesisen_US

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