Performance analysis of minimum variance CDMA receivers

1 November 1998

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Signal Processing

Vol. 46 (11) , 3014-3022
https://doi.org/10.1109/78.726814

Abstract

Constrained optimization of the receiver's output variance has previously been proposed as a relatively simple method for designing blind multiuser detectors for DS-CDMA systems. A single constraint is sufficient for the AWGN case, whereas multiple constraints should be used in a multipath environment. It is shown in this paper that the choice of the constraint parameters in the multipath case can have a significant effect on the system performance. A max/min approach for optimizing the constraint is proposed, resulting in blind solutions with improved performance. It is shown that the performance of the proposed method tends to be close to that of the MMSE receiver at high SNR, whereas the constraint parameters converge to the multipath channel parameters. The proposed method does not require knowledge of the interfering users' codes and timing. Simulation results support those performance claims.

Keywords

This publication has 18 references indexed in Scilit:

Reduced complexity blind 2D RAKE receiver for CDMA
Published by Institute of Electrical and Electronics Engineers (IEEE) ,2002
Multirate filter banks for code-division multiple access systems
Published by Institute of Electrical and Electronics Engineers (IEEE) ,2002
Blind multiuser channel estimation in asynchronous CDMA systems
IEEE Transactions on Signal Processing, 1997
Inverse filtering criteria for CDMA systems
IEEE Transactions on Signal Processing, 1997
Optimal decorrelating receivers for DS-CDMA systems: a signal processing framework
IEEE Transactions on Signal Processing, 1996
Blind adaptive multiuser detection
IEEE Transactions on Information Theory, 1995
Blind identification and equalization based on second-order statistics: a time domain approach
IEEE Transactions on Information Theory, 1994
MMSE interference suppression for direct-sequence spread-spectrum CDMA
IEEE Transactions on Communications, 1994
Performance analysis for DOA estimation algorithms: unification, simplification, and observations
IEEE Transactions on Aerospace and Electronic Systems, 1993
On the capacity of a cellular CDMA system
IEEE Transactions on Vehicular Technology, 1991