Multiuser detection for MIMO DS-CDMA system in impulsive noise over Nakagami-m fading channels

Abstract

This paper presents a new M-estimator based multiuser detection technique for multiple-input multiple-output (MIMO) direct-sequence code division multiple access (DS-CDMA) system including maximal ratio combining (MRC) receive diversity to combat multi access interference (MAI), multipath fading and impulsive noise. An expression for average bit error rate (BER) of M-decorrelator is derived to demodulate coherent BPSK signals over Nakagami-m fading channels. Simulation results shows that the proposed M-estimator based detector outperforms the linear decorrelating detector, the Huber and Hampel estimator based detectors.