DS-CDMA System with Linear Multiuser Detection in AWGN Channel
Siti Rohani Sheikh Raihan, B.C. Ng · 2008
Direct sequence code division multiple access (DS-CDMA) is a popular wireless technology. This paper presents comparative study between linear multiuser detectors, optimal multiuser detector, and conventional single user matched filter in DS-CDMA system. Analysis and simulations are conducted in synchronous AWGN channel, and Gold sequence is used as the spreading codes. The study shows that optimal multiuser detector performs better than the conventional matched filter and linear multiuser detector in terms of BER performance. However, optimal multiuser detector suffers from complex computation and costly implementation. MMSE detector provides better error performance than the decorrelating detector, but it utilizes the estimation of the received powers.