Robust Multiuser Detection for DS-CDMA Systems in Bandlimited White Laplace Noise

Abstract

The direct sequence-code division multiple accesses (DS-CDMA) signals are transmitted frequently over mobile communication channels that introduce heavy-tailed bandlimited white Laplace noise.  Combined effect of multiple access interference (MAI), inter-symbol interference (ISI) and Laplace noisedeteriorates the system performance. This paper presents the performance of proposed M-estimator based detector by evaluating probability of error.  Simulation results show that the proposed M-decorrelator performs better, in the presence of heavy-tailed Laplace noise, when compared to least squares, Huber and Hampel M-estimator based detectors.