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.
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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.
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Item type: Conference or Workshop Item(Paper) ID code: 38361 Dates: DateEventSeptember 2004PublishedSubjects: Technology > Electrical engineering. Electronics Nuclear engineering Department: Faculty of Engineering > Electronic and Electrical Engineering Depositing user: Pure Administrator Date deposited: 09 Mar 2012 14:28 Last modified: 09 Apr 2024 05:04 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/38361