A Linear Interference Cancellation Multi-User Detector for Synchronous CDMA Communications

摘要

This paper describes a linear interference cancellation multi-user detector for synchronous DS-CDMA systems under the condition that all spread spectrum code waveforms have the constant cross-correlating coefficients. The basic idea is to get the estimation for total multiple access interference (MAI) of all users using a reference code waveform, then subtract the total MAI from the received signal. The structure of such a detector is nearly similar to the conventional detector. The BER expression obtained in the paper shows significant performance improvement compared to the other detectors.