An adaptive decision feedback equalizer for time-varying frequency selective MIMO channels

Athanasios A. Rontogiannis, Vasileios Kekatos, Kostas Berberidis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

A new adaptive equalizer for wireless systems operating over time-varying and frequency selective multiple-input multiple-output (MIMO) channels is proposed. The equalizer consists of a number of decision feedback equalizer (DFE) stages, each one detecting a single stream. The equalizer filters, as well as the ordering by which the streams are extracted, are updated according to a LS cost function in a VBLAST-like fashion. By taking advantage of the underlying order recursive problem structure, a computationally efficient and numerically robust algorithm is developed based on the Cholesky factorization of the input data autocorrelation matrix. The convergence and tracking capabilities of the equalizer are studied through extensive computer simulations, and its BER performance is evaluated for hostile, time and frequency selective channels.

Original languageEnglish (US)
Title of host publication2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications, SPAWC
DOIs
StatePublished - Dec 1 2006
Event2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications, SPAWC - Cannes, France
Duration: Jul 2 2006Jul 5 2006

Publication series

NameIEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC

Other

Other2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications, SPAWC
CountryFrance
CityCannes
Period7/2/067/5/06

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