Adaptive blind chip-level multi-user detection in multi-rate synchronous DS-CDMA system with partial loading

M. Hadef, S. Weiss

Research output: Contribution to conferencePaper

13 Downloads (Pure)

Abstract

This paper addresses an adaptive blind multiuser detection strategy for a multi-rate direct sequence CDMA downlink channel. Specifically, two chip-level equalisation schemes, using either variable spreading length (VSL) or multi-code (MCD) multi-rate access modes, are proposed and tested. Both equalisers can be updated by minimising a hybrid CM/MSE cost function based on the constant modulus (CM) criterion for active users and a mean square error (MSE) criterion for inactive users in a partially loaded system. The BER performance abd the convergence of the proposed algorithms are analysed and compared through various simulations in both partially and fully loaded systems. Essentially, our results show that the VSL algorithm exhibits faster convergence than the MCD scheme while similar BER performance over different multi-path channels is achieved.
Original languageEnglish
Pages115-118
Number of pages4
Publication statusPublished - Jun 2004
Event2nd International Workshop on Signal Processing for Wireless Communications - London, United Kingdom
Duration: 2 Jun 20044 Jun 2004

Conference

Conference2nd International Workshop on Signal Processing for Wireless Communications
CountryUnited Kingdom
CityLondon
Period2/06/044/06/04

Fingerprint

Multiuser detection
Mean square error
Code division multiple access
Multipath propagation
Equalizers
Cost functions

Keywords

  • adaptive
  • blind chip-level
  • multi-user detection
  • multi-rare
  • synchronous ds-cdma system
  • partial loading
  • multi-rate direct sequence
  • two chip-level equalisation schemes
  • variable spreading length
  • vsl
  • multi-code
  • mce
  • multi-rate
  • access modes
  • equalisers

Cite this

Hadef, M., & Weiss, S. (2004). Adaptive blind chip-level multi-user detection in multi-rate synchronous DS-CDMA system with partial loading. 115-118. Paper presented at 2nd International Workshop on Signal Processing for Wireless Communications, London, United Kingdom.
Hadef, M. ; Weiss, S. / Adaptive blind chip-level multi-user detection in multi-rate synchronous DS-CDMA system with partial loading. Paper presented at 2nd International Workshop on Signal Processing for Wireless Communications, London, United Kingdom.4 p.
@conference{b087346277c0483a9f0b35938ea76e10,
title = "Adaptive blind chip-level multi-user detection in multi-rate synchronous DS-CDMA system with partial loading",
abstract = "This paper addresses an adaptive blind multiuser detection strategy for a multi-rate direct sequence CDMA downlink channel. Specifically, two chip-level equalisation schemes, using either variable spreading length (VSL) or multi-code (MCD) multi-rate access modes, are proposed and tested. Both equalisers can be updated by minimising a hybrid CM/MSE cost function based on the constant modulus (CM) criterion for active users and a mean square error (MSE) criterion for inactive users in a partially loaded system. The BER performance abd the convergence of the proposed algorithms are analysed and compared through various simulations in both partially and fully loaded systems. Essentially, our results show that the VSL algorithm exhibits faster convergence than the MCD scheme while similar BER performance over different multi-path channels is achieved.",
keywords = "adaptive, blind chip-level, multi-user detection, multi-rare , synchronous ds-cdma system, partial loading, multi-rate direct sequence, two chip-level equalisation schemes, variable spreading length, vsl, multi-code, mce, multi-rate, access modes, equalisers",
author = "M. Hadef and S. Weiss",
year = "2004",
month = "6",
language = "English",
pages = "115--118",
note = "2nd International Workshop on Signal Processing for Wireless Communications ; Conference date: 02-06-2004 Through 04-06-2004",

}

Hadef, M & Weiss, S 2004, 'Adaptive blind chip-level multi-user detection in multi-rate synchronous DS-CDMA system with partial loading', Paper presented at 2nd International Workshop on Signal Processing for Wireless Communications, London, United Kingdom, 2/06/04 - 4/06/04 pp. 115-118.

Adaptive blind chip-level multi-user detection in multi-rate synchronous DS-CDMA system with partial loading. / Hadef, M.; Weiss, S.

2004. 115-118 Paper presented at 2nd International Workshop on Signal Processing for Wireless Communications, London, United Kingdom.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Adaptive blind chip-level multi-user detection in multi-rate synchronous DS-CDMA system with partial loading

AU - Hadef, M.

AU - Weiss, S.

PY - 2004/6

Y1 - 2004/6

N2 - This paper addresses an adaptive blind multiuser detection strategy for a multi-rate direct sequence CDMA downlink channel. Specifically, two chip-level equalisation schemes, using either variable spreading length (VSL) or multi-code (MCD) multi-rate access modes, are proposed and tested. Both equalisers can be updated by minimising a hybrid CM/MSE cost function based on the constant modulus (CM) criterion for active users and a mean square error (MSE) criterion for inactive users in a partially loaded system. The BER performance abd the convergence of the proposed algorithms are analysed and compared through various simulations in both partially and fully loaded systems. Essentially, our results show that the VSL algorithm exhibits faster convergence than the MCD scheme while similar BER performance over different multi-path channels is achieved.

AB - This paper addresses an adaptive blind multiuser detection strategy for a multi-rate direct sequence CDMA downlink channel. Specifically, two chip-level equalisation schemes, using either variable spreading length (VSL) or multi-code (MCD) multi-rate access modes, are proposed and tested. Both equalisers can be updated by minimising a hybrid CM/MSE cost function based on the constant modulus (CM) criterion for active users and a mean square error (MSE) criterion for inactive users in a partially loaded system. The BER performance abd the convergence of the proposed algorithms are analysed and compared through various simulations in both partially and fully loaded systems. Essentially, our results show that the VSL algorithm exhibits faster convergence than the MCD scheme while similar BER performance over different multi-path channels is achieved.

KW - adaptive

KW - blind chip-level

KW - multi-user detection

KW - multi-rare

KW - synchronous ds-cdma system

KW - partial loading

KW - multi-rate direct sequence

KW - two chip-level equalisation schemes

KW - variable spreading length

KW - vsl

KW - multi-code

KW - mce

KW - multi-rate

KW - access modes

KW - equalisers

M3 - Paper

SP - 115

EP - 118

ER -

Hadef M, Weiss S. Adaptive blind chip-level multi-user detection in multi-rate synchronous DS-CDMA system with partial loading. 2004. Paper presented at 2nd International Workshop on Signal Processing for Wireless Communications, London, United Kingdom.