Title :
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
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;
Conference_Titel :
Signal Processing and Its Applications, 2003. Proceedings. Seventh International Symposium on
Print_ISBN :
0-7803-7946-2
DOI :
10.1109/ISSPA.2003.1224747
