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Blind chip-rate equalisation for DS-CDMA downlink receiver

Weiss, S. and Hadef, M. and Konrad, M. and Rupp, M. (2003) Blind chip-rate equalisation for DS-CDMA downlink receiver. In: Conference record of the 37th asilomar conference on signals, systems & computers. IEEE, New York, pp. 1283-1287. ISBN 0780381041

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Abstract

A dispersive channel in the DS-CDMA downlink destroys the orthogonality of the synchronous users' spreading sequences. In this paper, we aim to reestablish this orthogonality blindly by means of a common chip-level equaliser. The adaptation algorithm is based on a constant modulus criterion forcing the various user symbols onto a constant modulus, for which a stochastic gradient descent algorithm is derived. This algorithm is structurally similar to a multiple error filtered-X LMS type approach, whereby the equaliser input CM update is replaced by a spreading code filtered version. Various simulations demonstrating the algorithm's convergence and noise performance are presented.

Item type: Book Section
ID code: 40609
Keywords: multiuser detection, LMS , signals, algorithm, blind, chip-rate, equalisation, ds-cdma , downlink receiver, Electrical engineering. Electronics Nuclear engineering
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 31 Jul 2012 13:48
    Last modified: 06 Sep 2014 08:35
    URI: http://strathprints.strath.ac.uk/id/eprint/40609

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