Equivalence of Linear MMSE Detection in DS-CDMA and MC-CDMA Systems over Time and Frequency Selective Channels

The goal of this paper is to compare the performance of the linear minimum mean square error (MMSE) detector for a class of code division multiple access (CDMA) systems in time and frequency selective channels. Specifically, we consider direct sequence (DS)-CDMA, multicarrier (MC)-CDMA, and the MC-D...

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Bibliographic Details
Published inEURASIP journal on advances in signal processing Vol. 2002; no. 12; p. 151725
Main Authors Kadous, Tamer A., Sayeed, Akbar M.
Format Journal Article
LanguageEnglish
Published New York Springer Nature B.V 01.12.2003
Subjects
Channels
Code Division Multiple Access
Equivalence
Error detection
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Summary:The goal of this paper is to compare the performance of the linear minimum mean square error (MMSE) detector for a class of code division multiple access (CDMA) systems in time and frequency selective channels. Specifically, we consider direct sequence (DS)-CDMA, multicarrier (MC)-CDMA, and the MC-DS-CDMA systems. Two key tools are used in our development. First, a general time-frequency framework that includes the different CDMA systems as special cases. Second, the duality between time and frequency domains that is used to derive equivalences between the different CDMA systems operating over purely frequency selective and purely time selective channels. We then combine the insights obtained from these special cases to assess the performance of CDMA systems over time and frequency selective channels. We provide sufficient conditions for the codes employed by the CDMA systems for the equivalences to hold. Numerical results are presented to illustrate the results.
ISSN:1687-6180
1687-6172
1687-6180
DOI:10.1155/S1110865702209099