Performance comparison of adaptive MMSE-MRC MUD for DS-CDMA system in different multipath channels

Authors:
Mangala R. Gajbhiye;J. K. Satapathy
Affiliations:
National Institute of Technology Rourkela, Rourkela, Odisha, India;National Institute of Technology Rourkela, Rourkela, Odisha, India
Venue:
Proceedings of the 2011 International Conference on Communication, Computing & Security
Year:
2011

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Abstract

Direct-sequence code-division multiple access (DS-CDMA) is a popular multiple-access technology for wireless communication. However its performance is limited by multiple-access interference (MAI) and multipath distortion. Adaptive techniques for detection of DS-CDMA signals improves the performance of the CDMA system by reducing interference among users by employing two major types of adaptive technique called least mean squares (LMS) and recursive least square (RLS) in non-dispersive channels. In this paper the diversity scheme called maximum ratio combining (MRC) as preprocessor to the adaptive MMSE detector of DS-CDMA system is introduced and its performance is compared in different types of multipath channel i.e., minimum, mixed & maximum phase channels.