Turbo equalization: adaptive equalization and channel decoding jointly optimized

Authors:
C. Laot;A. Glavieux;J. Labat
Affiliations:
ENST Bretagne, Brest;-;-
Venue:
IEEE Journal on Selected Areas in Communications
Year:
2006

Citing 0
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Abstract

This paper deals with a receiver scheme where adaptive equalization and channel decoding are jointly optimized in an iterative process. This receiver scheme is well suited for transmissions over a frequency-selective channel with large delay spread and for high spectral efficiency modulations. A low-complexity soft-input soft-output M-ary channel decoder is proposed. Turbo equalization allows intersymbol interference to be reduced drastically. For most time-invariant discrete channels, the turbo-equalizer performance is close to the coded Gaussian channel performance, even for low signal-to-noise ratios. Finally, results over a time-varying frequency-selective channel proves the excellent behavior of the turbo equalizer