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Turbo Equalization without MMSE Filtering

Xiao, P, Carrasco, R and Wassell, I (2005) Turbo Equalization without MMSE Filtering In: 8th International Symposium on DSP and Communication Systems, 2005-12-19 - 2005-12-21, Sunshine Coast, Australia.

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Abstract

The filter-based turbo equalization scheme has been proposed in several papers to avoid the prohibitive complexity imposed by the trellis-based turbo equalization. In the existing literature,the filter-based approach has been solely implemented by a linear MMSE filter, the coeffi cients of which are updated to minimize the mean-square error for every output symbol of the equalizer. A new turbo equalization algorithm is introduced in this paper. It has a lower computational complexity compared to most of the existing MMSE filter-based turbo equalization schemes. The complexity reduction is accomplished by deriving log-likelihood ratios (LLRs) directly from the output of an interference canceler, thus avoiding the MMSE filtering and its inherent matrix inversion for each symbol estimate. Numerical results show that the proposed scheme enables ISI-free transmission for some frequency selective channels.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering > Centre for Communication Systems Research
Authors :
AuthorsEmailORCID
Xiao, PUNSPECIFIEDUNSPECIFIED
Carrasco, RUNSPECIFIEDUNSPECIFIED
Wassell, IUNSPECIFIEDUNSPECIFIED
Date : 1 December 2005
Contributors :
ContributionNameEmailORCID
PublisherDSP for Communication System, UNSPECIFIEDUNSPECIFIED
Depositing User : Symplectic Elements
Date Deposited : 15 Nov 2013 10:52
Last Modified : 09 Jun 2014 13:11
URI: http://epubs.surrey.ac.uk/id/eprint/798982

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