Asymptotic analysis of optimum and sub-optimum CDMA downlink MMSE receivers

Author

Chaufray, J.-M. ; Loubaton, Ph ; Hachem, W.

Author_Institution

Thales Commun., Univ. de Marne-La-Vallee, France

Volume

1

fYear

2003

fDate

1-4 July 2003

Firstpage

493

Abstract

In this paper, we investigate the performance of linear receivers for CDMA downlink transmissions over frequency selective channels, the users having possibly different powers. For large spreading factors and under some technical conditions, signal to interference and noise ratios (SINR) at the output of these receivers have simple and easily interpretable expressions. Free probability, a theory which studies in particular the asymptotic behavior of some large random matrices, is used. Two linear receivers are considered and compared: the MMSE receiver and a chip equalizer.

Keywords

code division multiple access; equalisers; least mean squares methods; probability; radio receivers; CDMA downlink transmission; MMSE receiver; asymptotic analysis; chip equalizer; code division multiple access; free probability; frequency selective channel; linear receiver performance; minimum mean squared error; random matrix; signal to interference ratio; signal to noise ratio; spreading factor; Downlink; Equalizers; Fading; Frequency; Gaussian distribution; Interference; Microwave filters; Multiaccess communication; Random sequences; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing and Its Applications, 2003. Proceedings. Seventh International Symposium on

Print_ISBN

0-7803-7946-2

Type

conf

DOI

10.1109/ISSPA.2003.1224747

Filename

1224747