Blind zero forcing equalization of multichannel nonlinear CDMAsystems

Authors:
A.J. Redfern;G.T. Zhou
Affiliations:
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA;-
Venue:
IEEE Transactions on Signal Processing
Year:
2001

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Abstract

Code division multiple access (CDMA) has emerged as a popular format for wireless communication systems. As a result of intersymbol interference (ISI) and nonlinearities, the performance of CDMA systems can suffer. In this paper, we propose a blind equalizer for CDMA systems with Volterra (nonlinear) channels. The equalizer requires multiple observations at the receiver, which are obtained through oversampling or an antenna array, and a knowledge of the code of the desired user. Zero forcing equalization is possible in the noise-free case. Simulations demonstrate the performance of the equalizer under a variety of operating conditions