Spectral efficiency of the feedback receiver for two sets of orthogonal sequences

TitleSpectral efficiency of the feedback receiver for two sets of orthogonal sequences
Publication TypeJournal Article
Year of Publication2002
AuthorsDjonin, D. V., and V. K. Bhargava
JournalCommunications Letters, IEEE
Volume6
Pagination497 - 499
Date Publishednov.
ISSN1089-7798
Keywordscode division multiple access, fading channels, feedback, feedback receiver, flat fading channels, Gaussian multiple access channel, multiuser detection, radio receivers, sequences, spectral analysis, spectral efficiency analysis, spread spectrum communication, synchronous DS-CDMA system, TSOS scheme, two sets of orthogonal sequences
Abstract

We present the spectral efficiency analysis of the recently proposed feedback receiver for two sets of orthogonal sequences (TSOS) scheme which is capable of supporting higher number of users than the spreading gain of the DS/CDMA system. The added complexity is minimal compared to the conventional matched filter. We show that in the case of coded system, spectral efficiency of this scheme is close to that of a Gaussian multiple access channel if the incomplete group of orthogonal sequences is detected first. We also discuss the choice of orthogonal sequences that maximizes the spectral efficiency. This analysis is extended for the case of flat fading channels.

URLhttp://dx.doi.org/10.1109/LCOMM.2002.805516
DOI10.1109/LCOMM.2002.805516

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