The University of Southampton
University of Southampton Institutional Repository

Blind Multi-User Equalisation for a Dispersive DS-CDMA Downlink under Carrier Frequency Offset Conditions

Blind Multi-User Equalisation for a Dispersive DS-CDMA Downlink under Carrier Frequency Offset Conditions
Blind Multi-User Equalisation for a Dispersive DS-CDMA Downlink under Carrier Frequency Offset Conditions
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.
constant modulus algorithm, adaptive equalisation
3-200-00165-8
2235-2238
Weiss, S
a1716781-351d-41d2-8d67-3e3d34f16476
Hadef, M
afe928bb-6ce4-4060-8370-593fd2402cd6
Rupp, M
0c64c1d7-5b23-4cc3-b2e9-2ce89974cab6
Weiss, S
a1716781-351d-41d2-8d67-3e3d34f16476
Hadef, M
afe928bb-6ce4-4060-8370-593fd2402cd6
Rupp, M
0c64c1d7-5b23-4cc3-b2e9-2ce89974cab6

Weiss, S, Hadef, M and Rupp, M (2004) Blind Multi-User Equalisation for a Dispersive DS-CDMA Downlink under Carrier Frequency Offset Conditions. 12th European Signal Processing Conference, Vienna, Austria. 07 - 10 Sep 2004. pp. 2235-2238 .

Record type: Conference or Workshop Item (Paper)

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.

Text
weiss04b.pdf - Other
Download (405kB)

More information

Published date: 2004
Additional Information: Commentary On: invited paper Event Dates: September 7-10
Venue - Dates: 12th European Signal Processing Conference, Vienna, Austria, 2004-09-07 - 2004-09-10
Keywords: constant modulus algorithm, adaptive equalisation
Organisations: Electronics & Computer Science

Identifiers

Local EPrints ID: 259934
URI: http://eprints.soton.ac.uk/id/eprint/259934
ISBN: 3-200-00165-8
PURE UUID: 176d2142-642e-40e4-ad4a-37607b6c9369

Catalogue record

Date deposited: 13 Sep 2004
Last modified: 14 Mar 2024 06:29

Export record

Contributors

Author: S Weiss
Author: M Hadef
Author: M Rupp

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×