Adaptive conjugate gradient DFEs for wideband MIMO systems using galerkin projections

Vasileios Kekatos, Aris S. Lalos, Kostas Berberidis

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

1 Scopus citations

Abstract

Three new adaptive equalization algorithms for wireless systems operating over frequency selective MIMO channels are proposed. The problem of the MIMO DFE design is formulated as a set of linear equations with multiple right-hand sides (RHS) evolving in time. By applying an adaptive modified conjugate gradient algorithm, originally proposed for a single linear system, to the problem at hand, we arrive at an equalizer of performance identical to RLS, numerically robust, but of higher computational cost. To reduce its complexity, two updating strategies of the equalizer filters are derived based on Galerkin projection in time and space respectively. The two alternative schemes exhibit a complexity lower than RLS while offering slightly inferior convergence properties.

Original languageEnglish (US)
Title of host publication2007 IEEE 66th Vehicular Technology Conference, VTC 2007-Fall
Pages486-490
Number of pages5
DOIs
StatePublished - Dec 1 2007
Event2007 IEEE 66th Vehicular Technology Conference, VTC 2007-Fall - Baltimore, MD, United States
Duration: Sep 30 2007Oct 3 2007

Publication series

NameIEEE Vehicular Technology Conference
ISSN (Print)1550-2252

Other

Other2007 IEEE 66th Vehicular Technology Conference, VTC 2007-Fall
CountryUnited States
CityBaltimore, MD
Period9/30/0710/3/07

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