Abstract
A multiple-antenna multiple-equalizer (MAME) system for interference suppression in some code-division multiple-access (CDMA) indoor wireless systems is investigated. The MAME system offers enhanced interference suppression capabilities over existing approaches under certain conditions and can thus increase system capacity. The details of the MAME system are discussed and the unique features of this work as compared with many other studies on space-time processing are explained using spectral correlation and diversity domain concepts. The effects of the number of antennas, tap spacing of the equalizers, spectral correlation, and diversity domains are discussed using simulation results. Adaptation performance results are also presented and a recently proposed quasi-Newton algorithm is recommended for use in the MAME system. Decision-directed equalization results are also studied under various conditions and bit-error rate results are presented. Simulation results illustrate that the MAME system can offer enhanced interference suppression capabilities in CDMA indoor wireless systems.
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