Blind Multiuser Detection in Asynchronous DS-CDMA Systems over Nakagami-m Fading Channels

This paper presents a technique for blind multiuser detection in asynchronous direct sequence-code division multiple access (DS-CDMA) systems over Nakagami-m fading channels with impulsive noise. A new Mestimator is proposed and analyzed for robustifying the detector. A closed-from expression for average error rate of DPSK signals is derived. Average probability of error is computed to evaluate the performance of the new M-estimator based blind multiuser detector in comparison with the linear decorrelating detector, Huber and Hampel estimator based detectors. Simulation results show that the new M-estimator based detector performs well.