Robust Multiuser Detection in Synchronous DS-CDMA System with MRC Receive Diversity over Nakagami-&lt;i&gt;m&lt;/i&gt; Fading Channel

Rao V Srinivasa,Kumar P Vinay,Kumar T Anil,Khan Habibulla,S Balaji

doi:10.4028/www.scientific.net/aef.4.43

Abstract

This paper presents the robust multiuser detection in synchronous direct sequence-code division multiple access (DS-CDMA) systems with Maximal Ratio Combiner (MRC) receive diversity over frequency-nonselective, slowly fading Nakagami-m channels in a non-Gaussian environment. Average probability of error is derived for decorrelating detector over single path Nakagami-m fading channel. A new M-estimator proposed to robustify the detector is studied and analyzed. Simulation results show that the new M-estimator outperforms linear decorrelating detector, the Huber, and the Hampel estimator based detectors.

Highlights

Direct sequence-code division multiple access (DS-CDMA), a multiple access technique, has attracted considerable attention of researchers and used in many cellular mobile communication systems
This paper presents the performance of a direct sequence (DS)-CDMA system with Maximal Ratio Combiner (MRC) receive diversity scheme over frequency-nonselective, slowly fading Nakagami-m multipath channel in a non-Gaussian environment
Simulation results for the average probability of error are presented by computing Eq (21) for different values of Nakagami fading parameter and for different order of diversity with Ωo=10 dB, δ = 0.1, 0.3 and 0.9

Summary

Introduction

Direct sequence-code division multiple access (DS-CDMA), a multiple access technique, has attracted considerable attention of researchers and used in many cellular mobile communication systems. [10] analyzed decorrelator receiver for DS-CDMA mobile radio system, employing RAKE reception and both MRC and SC diversity, through Nakagami fading channel. This paper presents the performance of a DS-CDMA system with MRC receive diversity scheme over frequency-nonselective, slowly fading Nakagami-m multipath channel in a non-Gaussian environment.

Results

Conclusion