A semi-blind channel equalisation strategy for the UMTS-TDD downlink

M. Hadef, S. Weiss

Research output: Contribution to conferencePaper

Abstract

In this paper, we propose a semi-blind channel equalisation scheme for the downlink time-division duplex (TDD) component of the universal mobile telecommunication system (UMTS). The main two concepts introduced consist of: first exploiting the constant modulus carried by the decoded symbols of all active users; and second making use of the inactive users to load a suitable number of pilot signals. In response to this scenario, a semi-blind equalisation is performed in the data fields, whereby the equaliser weights are updated by minimising a hybrid CM/MSE cost function based on the constant modulus (CM) criterion for all active users and a mean square error (MSE) criterion for both absent users and pilot signals. Computer simulations are used to assess and analyse the channel equalisation strategy in terms of MSE and BER performance over a quasi-static dispersive channel.

Workshop

Workshop3rd Workshop on the Internet, Telecommunications, and Signal Processing
Abbreviated titleWITSP'2004
CountryAustralia
CityAdelaide
Period20/12/0422/12/04

Fingerprint

Mobile telecommunication systems
Mean square error
Blind equalization
Equalizers
Cost functions
Computer simulation

Keywords

  • semi-blind
  • channel equalisation strategy
  • umts-tdd downlink
  • downlink time-division duplex
  • universal mobile telecommunications system
  • umts
  • active users
  • inactive users
  • pilot signals
  • hybrid cm/mse
  • constant modulus
  • cm
  • mean square error
  • mse`
  • computer simulations
  • quasi-static dispersive channel

Cite this

Hadef, M., & Weiss, S. (2004). A semi-blind channel equalisation strategy for the UMTS-TDD downlink. 262-267. Paper presented at 3rd Workshop on the Internet, Telecommunications, and Signal Processing, Adelaide, Australia.
Hadef, M. ; Weiss, S. / A semi-blind channel equalisation strategy for the UMTS-TDD downlink. Paper presented at 3rd Workshop on the Internet, Telecommunications, and Signal Processing, Adelaide, Australia.6 p.
@conference{22965dd68e6546e9a9d1e2503047e844,
title = "A semi-blind channel equalisation strategy for the UMTS-TDD downlink",
abstract = "In this paper, we propose a semi-blind channel equalisation scheme for the downlink time-division duplex (TDD) component of the universal mobile telecommunication system (UMTS). The main two concepts introduced consist of: first exploiting the constant modulus carried by the decoded symbols of all active users; and second making use of the inactive users to load a suitable number of pilot signals. In response to this scenario, a semi-blind equalisation is performed in the data fields, whereby the equaliser weights are updated by minimising a hybrid CM/MSE cost function based on the constant modulus (CM) criterion for all active users and a mean square error (MSE) criterion for both absent users and pilot signals. Computer simulations are used to assess and analyse the channel equalisation strategy in terms of MSE and BER performance over a quasi-static dispersive channel.",
keywords = "semi-blind, channel equalisation strategy, umts-tdd downlink, downlink time-division duplex, universal mobile telecommunications system, umts, active users, inactive users, pilot signals, hybrid cm/mse, constant modulus, cm, mean square error, mse`, computer simulations, quasi-static dispersive channel",
author = "M. Hadef and S. Weiss",
year = "2004",
month = "12",
language = "English",
pages = "262--267",
note = "3rd Workshop on the Internet, Telecommunications, and Signal Processing, WITSP'2004 ; Conference date: 20-12-2004 Through 22-12-2004",

}

Hadef, M & Weiss, S 2004, 'A semi-blind channel equalisation strategy for the UMTS-TDD downlink' Paper presented at 3rd Workshop on the Internet, Telecommunications, and Signal Processing, Adelaide, Australia, 20/12/04 - 22/12/04, pp. 262-267.

A semi-blind channel equalisation strategy for the UMTS-TDD downlink. / Hadef, M.; Weiss, S.

2004. 262-267 Paper presented at 3rd Workshop on the Internet, Telecommunications, and Signal Processing, Adelaide, Australia.

Research output: Contribution to conferencePaper

TY - CONF

T1 - A semi-blind channel equalisation strategy for the UMTS-TDD downlink

AU - Hadef, M.

AU - Weiss, S.

PY - 2004/12

Y1 - 2004/12

N2 - In this paper, we propose a semi-blind channel equalisation scheme for the downlink time-division duplex (TDD) component of the universal mobile telecommunication system (UMTS). The main two concepts introduced consist of: first exploiting the constant modulus carried by the decoded symbols of all active users; and second making use of the inactive users to load a suitable number of pilot signals. In response to this scenario, a semi-blind equalisation is performed in the data fields, whereby the equaliser weights are updated by minimising a hybrid CM/MSE cost function based on the constant modulus (CM) criterion for all active users and a mean square error (MSE) criterion for both absent users and pilot signals. Computer simulations are used to assess and analyse the channel equalisation strategy in terms of MSE and BER performance over a quasi-static dispersive channel.

AB - In this paper, we propose a semi-blind channel equalisation scheme for the downlink time-division duplex (TDD) component of the universal mobile telecommunication system (UMTS). The main two concepts introduced consist of: first exploiting the constant modulus carried by the decoded symbols of all active users; and second making use of the inactive users to load a suitable number of pilot signals. In response to this scenario, a semi-blind equalisation is performed in the data fields, whereby the equaliser weights are updated by minimising a hybrid CM/MSE cost function based on the constant modulus (CM) criterion for all active users and a mean square error (MSE) criterion for both absent users and pilot signals. Computer simulations are used to assess and analyse the channel equalisation strategy in terms of MSE and BER performance over a quasi-static dispersive channel.

KW - semi-blind

KW - channel equalisation strategy

KW - umts-tdd downlink

KW - downlink time-division duplex

KW - universal mobile telecommunications system

KW - umts

KW - active users

KW - inactive users

KW - pilot signals

KW - hybrid cm/mse

KW - constant modulus

KW - cm

KW - mean square error

KW - mse`

KW - computer simulations

KW - quasi-static dispersive channel

M3 - Paper

SP - 262

EP - 267

ER -

Hadef M, Weiss S. A semi-blind channel equalisation strategy for the UMTS-TDD downlink. 2004. Paper presented at 3rd Workshop on the Internet, Telecommunications, and Signal Processing, Adelaide, Australia.