Performance Analysis of a DS/CDMA System Using a Successive Interference Cancellation Scheme

Overcoming near/far effects and fading is imperative for satisfactory performance of DS/CDMA systems. Commercial digital cellular system based on CDMA uses stringent power control to combat nearlfar effects and fading. Another approach which has a fundamental potential in not only eliminating near/far problems but also in significantly raising capacity, is multiuser detectors and interference cancellers. Valuable fundamental investigations have demonstrated huge potential capacity and performance improvements. Most of these schemes,however, get too complex even for relatively simple systems and rely on good channel estimates.. In this work, we analyze the performance of a simple successive interference cancellation (IC) scheme applied to a simple coherent BPSK modulation scheme, where the parameter estimation is done using the output of a linear correlator.

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