Performance of frequency domain multiuser detector for synchronous CDMA communication over Rician fading channels

The performance of frequency domain multiuser detector (FD-MUD) proposed by Lops, Ricci, and Tulino (see IEEE ISSSTA '96, p.541-5, Mainz, Germany, 1996) is analyzed over a Rician fading channel. The bit error probabilities for FD-MUD with coherent detection and differentially coherent detection are derived. The results are compared with those of the decorrelating detector. Through numerical examples, it is shown that the FD-MUD has a lower bit error rate than the decorrelating detector over a Rician fading channel. It is also shown that the FD-MUD has a robustness to narrowband interference. In addition, the advantages of the FD-MUD over decorrelating detector in implementation of the detector are investigated.