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A Low Complexity Subband Adaptive Equaliser for Broadband MIMO Channels

A Low Complexity Subband Adaptive Equaliser for Broadband MIMO Channels
A Low Complexity Subband Adaptive Equaliser for Broadband MIMO Channels
This paper addresses trained adaptation of broadband multiple-input multiple-output (MIMO) equalisers operating in severely time-dispersive environments which result in slow convergence and poor performance for least mean squares (LMS) type algorithms. We present a subband approach, which enhances a normalised LMS (NLMS) convergence by prewhitening of the input signals and reduces its computational complexity. Equalisation based on the recursive least squares (RLS) algorithm in the time domain is prohibitive due to its high complexity, which can be drastically reduced by the subband approach to an extend such that the overall RLS cost for convergence may be much lower than the subband NLMS. The performance of the various systems is compared in simulations.
952-15-1229-6
61-68
Bale, V
f7fd7b64-ec10-4fb7-9bfd-b592ab32cff9
Weiss, S
a1716781-351d-41d2-8d67-3e3d34f16476
Bale, V
f7fd7b64-ec10-4fb7-9bfd-b592ab32cff9
Weiss, S
a1716781-351d-41d2-8d67-3e3d34f16476

Bale, V and Weiss, S (2004) A Low Complexity Subband Adaptive Equaliser for Broadband MIMO Channels. International Workshop on Spectral Methods and Multirate Signal Processing, Austria. 11 - 12 Sep 2004. pp. 61-68 .

Record type: Conference or Workshop Item (Paper)

Abstract

This paper addresses trained adaptation of broadband multiple-input multiple-output (MIMO) equalisers operating in severely time-dispersive environments which result in slow convergence and poor performance for least mean squares (LMS) type algorithms. We present a subband approach, which enhances a normalised LMS (NLMS) convergence by prewhitening of the input signals and reduces its computational complexity. Equalisation based on the recursive least squares (RLS) algorithm in the time domain is prohibitive due to its high complexity, which can be drastically reduced by the subband approach to an extend such that the overall RLS cost for convergence may be much lower than the subband NLMS. The performance of the various systems is compared in simulations.

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More information

Published date: 2004
Additional Information: Event Dates: September 11-12
Venue - Dates: International Workshop on Spectral Methods and Multirate Signal Processing, Austria, 2004-09-11 - 2004-09-12
Organisations: Electronics & Computer Science

Identifiers

Local EPrints ID: 259932
URI: https://eprints.soton.ac.uk/id/eprint/259932
ISBN: 952-15-1229-6
PURE UUID: b894ff5c-2fa6-4e96-a525-148cad4f0836

Catalogue record

Date deposited: 13 Sep 2004
Last modified: 18 Jul 2017 09:18

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