Performance Analysis of DS - CDMA Systems on Nakagami Fading Channels with Impulsive Noise O

Performance analysis of maximal-ratio combining receive diversity scheme over Nakagami-0.5 fading channels and its application to the multiuser detection for direct sequence-code division multiple access systems is presented in this paper. A new M-estimator, which performs well in the heavy-tailed impulsive noise, is proposed to robustify the detector. Further, the performance of Eigen mode transmission over a multiple-input–multiple-output Nakagami channel under the channel inversion power allocation scheme is also investigated. The extension to Rician and Rayleigh fading scenarios is also outlined. Simulation results are provided to show the efficacy of the proposed M-estimator, under severe fading conditions of Nakagami-m channel. Keywords— Code-Division Multiple-Access (CDMA), Channel inversion (CI), Maximal Ratio Combiner, Multiple-Input MultipleOutput (MIMO), M-Estimator; Multiuser Detection; Nakagami-m Fading.