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Blind multi-user equalisation for a dispersive DS-CDMA downlink under carrier frequency offset conditions

Weiss, S. and Hadef, M. and Rupp, M. (2004) Blind multi-user equalisation for a dispersive DS-CDMA downlink under carrier frequency offset conditions. In: 12th European Signal Processing Conference, 2004-09-06 - 2004-09-10, Vienna.

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Abstract

We address blind multiuser detection in a DS-CDMA downlink channel in the presence of carrier frequency offset. The synchronous users are separated by re-establishing orthogonality of their spreading sequences in a shared equaliser at the chip level. The adaptation algorithm is based on a constant modulus criterion of the various users, for which a stochastic gradient descent algorithm can be derived. We show that the resulting filtered-error filtered-regressor algorithm requires modifications in order to cope with carrier offset, and propose an combined blind multiuser equaliser with blind carrier frequency offset estimation. Simulations demonstrating the algorithm's convergence and BER performance are presented.

Item type: Conference or Workshop Item (Paper)
ID code: 38361
Keywords: blind multi-user, equalisation, dispersive ds-cdma, downlink, carrier frequency, offset conditions, 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: 09 Mar 2012 14:28
Last modified: 04 Oct 2012 17:16
URI: http://strathprints.strath.ac.uk/id/eprint/38361

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