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A Semi-Blind Channel Equalisation Strategy for the UMTS-TDD Downlink

A Semi-Blind Channel Equalisation Strategy for the UMTS-TDD Downlink
A Semi-Blind Channel Equalisation Strategy for the UMTS-TDD Downlink
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.
0-9756934-0-9
262-267
Hadef, M
afe928bb-6ce4-4060-8370-593fd2402cd6
Weiss, S
a1716781-351d-41d2-8d67-3e3d34f16476
Hadef, M
afe928bb-6ce4-4060-8370-593fd2402cd6
Weiss, S
a1716781-351d-41d2-8d67-3e3d34f16476

Hadef, M and Weiss, S (2004) A Semi-Blind Channel Equalisation Strategy for the UMTS-TDD Downlink. £rd Workshop on the Internet, Telecommunications, and Signal Processing, Adelaide, Australia. 20 - 22 Dec 2004. pp. 262-267 .

Record type: Conference or Workshop Item (Paper)

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.

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More information

Published date: 2004
Additional Information: Event Dates: 20-22 December
Venue - Dates: £rd Workshop on the Internet, Telecommunications, and Signal Processing, Adelaide, Australia, 2004-12-20 - 2004-12-22
Organisations: Electronics & Computer Science

Identifiers

Local EPrints ID: 260277
URI: http://eprints.soton.ac.uk/id/eprint/260277
ISBN: 0-9756934-0-9
PURE UUID: 53e1b8df-abbb-41b8-a90b-eebf04371713

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Date deposited: 17 Jan 2005
Last modified: 23 Sep 2020 16:35

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