Blind Chip-Rate Multiuser Equalisation
Blind Chip-Rate Multiuser Equalisation
This paper addresses blind multiuser detection in a DS-CDMA downlink channel. The synchronous users are separated by re-establishing orthogonality of their spreading sequences in a common chip-rate equaliser. The adaptation algorithm can be based either on a constant modulus (CMA) criterion of the various users, or on a decision directed (DD) scheme. In either case, a stochastic gradient descent algorithm will result, as derived, in a multiple error filtered-X LMS type approach, whereby the equaliser input to both the multichannel CMA or DD algorithm are replaced by spreading code filtered versions. Adaptation examples are given underlining some of the characteristics of the proposed algorithms
436-443
Weiss, S.
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Hadef, M.
2bc570f5-203c-4a23-8e8b-ce13775b44ee
Stewart, R.W.
a843b62c-8782-4394-a512-b5687a4b82b4
Garcia-Alis, D.
0b187cff-8eb7-4494-8123-58bdfd8d065e
2003
Weiss, S.
55a13123-6604-4dad-b647-7347683c8c49
Hadef, M.
2bc570f5-203c-4a23-8e8b-ce13775b44ee
Stewart, R.W.
a843b62c-8782-4394-a512-b5687a4b82b4
Garcia-Alis, D.
0b187cff-8eb7-4494-8123-58bdfd8d065e
Weiss, S. and Hadef, M.
(2003)
Blind Chip-Rate Multiuser Equalisation.
Stewart, R.W. and Garcia-Alis, D.
(eds.)
IEE Colloquium on DSP Enable Radio, Livingston, United Kingdom.
22 - 23 Sep 2003.
.
Record type:
Conference or Workshop Item
(Other)
Abstract
This paper addresses blind multiuser detection in a DS-CDMA downlink channel. The synchronous users are separated by re-establishing orthogonality of their spreading sequences in a common chip-rate equaliser. The adaptation algorithm can be based either on a constant modulus (CMA) criterion of the various users, or on a decision directed (DD) scheme. In either case, a stochastic gradient descent algorithm will result, as derived, in a multiple error filtered-X LMS type approach, whereby the equaliser input to both the multichannel CMA or DD algorithm are replaced by spreading code filtered versions. Adaptation examples are given underlining some of the characteristics of the proposed algorithms
Text
41_WEISS_SOUTHAMPTON.pdf
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More information
Published date: 2003
Additional Information:
Event Dates: 22-23 September 2003
Venue - Dates:
IEE Colloquium on DSP Enable Radio, Livingston, United Kingdom, 2003-09-22 - 2003-09-23
Organisations:
Electronics & Computer Science
Identifiers
Local EPrints ID: 258277
URI: http://eprints.soton.ac.uk/id/eprint/258277
PURE UUID: 2bfb05f4-44c4-4e61-a11b-45060caecf01
Catalogue record
Date deposited: 25 Sep 2003
Last modified: 14 Mar 2024 06:07
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Contributors
Author:
S. Weiss
Author:
M. Hadef
Editor:
R.W. Stewart
Editor:
D. Garcia-Alis
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