Performance evaluation of a switched mode detector using nonlinear method

Abstract

Compensating for near/far effects is critical for satisfactory performance of DS/CDMA systems. One solution for reducing near/far effect is multiuser detection. Various optimal and sub optimal methods have been investigated. Most of these methods, get too complex even for relatively simple system. We propose a switched mode detector which switches its detection mode between matched filter detector and successive interference cancellation (SIC) detector according to the channel conditions. This detector reduces overall complexity while maintaining the same performance as SIC detector. The switching mechanism is exploited by performance complexity tradeoff between matched filter detector and SIC detector.