Predetection diversity for CDMA indoor radio communications

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Abstract
This paper investigates the average bit error rate performance of a direct sequence code division multiple access system operating over a multipath Rician fading channel (which models indoor radio propagation in factories). We consider both phase shift-keying modulation with coherent demodulation and differential phase-shift-keying modulation with non-coherent demodulation. Predetection multipath diversity (maximal-ratio-combining for coherent reception and equal gain combining for non-coherent reception) is considered for improving the BER performance.

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