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Titolo:
SET-MEMBERSHIP ADAPTIVE EQUALIZATION AND AN UPDATOR-SHARED IMPLEMENTATION FOR MULTIPLE-CHANNEL COMMUNICATIONS-SYSTEMS
Autore:
GOLLAMUDI S; KAPOOR S; NAGARAJ S; HUANG YF;
Indirizzi:
UNIV NOTRE DAME,DEPT ELECT ENGN,LAB IMAGE & SIGNAL ANAL NOTRE DAME IN46556
Titolo Testata:
IEEE transactions on signal processing
fascicolo: 9, volume: 46, anno: 1998,
pagine: 2372 - 2385
SICI:
1053-587X(1998)46:9<2372:SAEAAU>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
BOUNDED NOISE; IDENTIFICATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
S. Gollamudi et al., "SET-MEMBERSHIP ADAPTIVE EQUALIZATION AND AN UPDATOR-SHARED IMPLEMENTATION FOR MULTIPLE-CHANNEL COMMUNICATIONS-SYSTEMS", IEEE transactions on signal processing, 46(9), 1998, pp. 2372-2385

Abstract

This paper considers the problems of channel estimation and adaptive equalization in the novel framework of set-membership parameter estimation. Channel estimation using a class of set-membership identification algorithms known as optimal bounding ellipsoid (OBE) algorithms and their extension to track time-varying channels are described. Simulation results show that the OBE channel estimators outperform the least-mean-square (LMS) algorithm and perform comparably with the PES and theKalman filter. The concept of set-membership equalization is introduced along with the notion of a feasible equalizer, Necessary and sufficient conditions are derived for the existence of feasible equalizers in the case of linear equalization for a linear FIR additive noise channel. An adaptive OBE algorithm is shown to provide a set of estimated feasible equalizers. The selective update feature of the OBE algorithms is exploited to devise an updator-shared scheme in a multiple channel environment, referred to as updator-shared parallel adaptive equalization (U-SHAPE), U-SHAPE is shown to reduce hardware complexity significantly. Procedures to compute the minimum number of updating processors required for a specified quality of service are presented.

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Documento generato il 16/07/20 alle ore 04:55:38