A constant modulus algorithm for multiuser signal separation inpresence of delay spread using antenna arrays
Papadias, C.B.
Paulraj, A.J.
Inf. Syst. Lab., Stanford Univ., CA;
This paper appears in: Signal Processing Letters, IEEE
Publication Date: Jun 1997
Volume: 4,
Issue: 6
On page(s): 178-181
ISSN: 1070-9908
References Cited: 14
CODEN: IESPEJ
INSPEC Accession Number: 5610217
Digital Object Identifier: 10.1109/97.586042
Current Version Published: 2002-08-06
Abstract
The consider the problem of recovering p synchronous communication
signals that are transmitted through a multiple-input/multiple-output
(MIMO) linear channel and are, therefore, received in the presence of
both interuser (IUI) and intersymbol interference (ISI). A multichannel
linear equalization approach is taken, and we propose to adjust the
equalizer coefficients with a blind adaptive algorithm (without the use
of training data). This multiuser constant modulus algorithm (MU-CMA) is
derived from the minimization of a cost function that penalizes
deviations of the equalized signals from the constant modulus property
as well as cross-correlations between them. The proposed scheme appears
to be an appealing technique for multiuser blind equalization that
combines good convergence properties with low computational complexity
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