Blind chip-rate equalisation for DS-CDMA downlink receiver

S. Weiss; M. Hadef; M. Konrad; M. Rupp

doi:10.1109/ACSSC.2003.1292195

Blind chip-rate equalisation for DS-CDMA downlink receiver

S. Weiss, M. Hadef, M. Konrad, M. Rupp

Electronic And Electrical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book

10 Citations (Scopus)

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.

Original language	English
Title of host publication	Conference record of the 37th asilomar conference on signals, systems & computers
Editors	M.B. Matthews
Place of Publication	New York
Publisher	IEEE
Pages	1283-1287
Number of pages	5
ISBN (Print)	0780381041
DOIs	https://doi.org/10.1109/ACSSC.2003.1292195
Publication status	Published - 12 Nov 2003
Event	37th Asilomar Conference on Signals, Systems and Computers - Pacific Grove, California, United States Duration: 9 Nov 2003 → 12 Nov 2003

Conference

Conference	37th Asilomar Conference on Signals, Systems and Computers
Country/Territory	United States
City	Pacific Grove, California
Period	9/11/03 → 12/11/03
Other	09 Nov - 12 Nov 2003

Keywords

multiuser detection
LMS
signals
algorithm
blind
chip-rate
equalisation
ds-cdma
downlink receiver

Access to Document

10.1109/ACSSC.2003.1292195

Cite this

@inproceedings{0fe041ba404a4fa18d12eb9438579870,

title = "Blind chip-rate equalisation for DS-CDMA downlink receiver",

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.",

keywords = "multiuser detection, LMS , signals, algorithm, blind, chip-rate, equalisation, ds-cdma , downlink receiver",

author = "S. Weiss and M. Hadef and M. Konrad and M. Rupp",

year = "2003",

month = nov,

day = "12",

doi = "10.1109/ACSSC.2003.1292195",

language = "English",

isbn = "0780381041",

pages = "1283--1287",

editor = "Matthews, {M.B. }",

booktitle = "Conference record of the 37th asilomar conference on signals, systems & computers",

publisher = "IEEE",

note = "37th Asilomar Conference on Signals, Systems and Computers ; Conference date: 09-11-2003 Through 12-11-2003",

}

Weiss, S, Hadef, M, Konrad, M & Rupp, M 2003, Blind chip-rate equalisation for DS-CDMA downlink receiver. in MB Matthews (ed.), Conference record of the 37th asilomar conference on signals, systems & computers. IEEE, New York, pp. 1283-1287, 37th Asilomar Conference on Signals, Systems and Computers, Pacific Grove, California, United States, 9/11/03. https://doi.org/10.1109/ACSSC.2003.1292195

TY - GEN

T1 - Blind chip-rate equalisation for DS-CDMA downlink receiver

AU - Weiss, S.

AU - Hadef, M.

AU - Konrad, M.

AU - Rupp, M.

PY - 2003/11/12

Y1 - 2003/11/12

N2 - 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.

AB - 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.

KW - multiuser detection

KW - LMS

KW - signals

KW - algorithm

KW - blind

KW - chip-rate

KW - equalisation

KW - ds-cdma

KW - downlink receiver

U2 - 10.1109/ACSSC.2003.1292195

DO - 10.1109/ACSSC.2003.1292195

M3 - Conference contribution book

SN - 0780381041

SP - 1283

EP - 1287

BT - Conference record of the 37th asilomar conference on signals, systems & computers

A2 - Matthews, M.B.

PB - IEEE

CY - New York

T2 - 37th Asilomar Conference on Signals, Systems and Computers

Y2 - 9 November 2003 through 12 November 2003

ER -

Blind chip-rate equalisation for DS-CDMA downlink receiver

Abstract

Conference

Keywords

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