Reverse Link Performance of CDMA Systems with RAKE Receiver and Multiple Access Interference Cancellation

All the subscribers in CDMA systems share the common channel. The limitation factor on the
system’s capacity is not the bandwidth, but multiuser interference and the near far problem. In this
chapter, we model CDMA system from the perspective of mobile radio channels corrupted by additive
white noise generated by multipath and multiple access interferences. The system’s receiver is
assisted using different combining diversity techniques such as Decorrelating Detector (DD), Minimum
Mean Squared Error (MMSE) and Parallel Interference Cancellation (PIC). Performance analysis of
the system with these detection techniques is presented. The chapter demonstrates that combining
diversity techniques in the system’s receivers markedly improve the performance of CDMA systems.