Decision feedback turbo equalization for space-time coded systems

Author

González-López, Miguel ; Miguez, Jouquiín ; Castedo, Luis

Author_Institution

Departamento de Electronica y Sistemas, Univ. de A Coruna, Spain

Volume

4

fYear

2003

fDate

6-10 April 2003

Abstract

We present a novel turbo equalization structure for space-time coded systems. It is based on performing channel equalization via a decision feedback equalizer (DFE) designed using a novel maximum likelihood criterion. The resulting optimization problem is solved using the space-alternating generalized EM (SAGE) algorithm. This results in expressions for the forward and backward filters of the DFE that take large benefit from the more and more refined estimations of the transmitted symbols iteratively obtained by the outer decoder.

Keywords

decision feedback equalisers; iterative decoding; maximum likelihood decoding; maximum likelihood detection; multipath channels; optimisation; space-time codes; DFE; MAP detector; SAGE; backward filters; channel equalization; decision feedback equalizer; decision feedback turbo equalization; expectation-maximisation; forward filters; iterative decoder; maximum likelihood criterion; maximum likelihood decoding; multipath channels; optimization problem; space-alternating generalized EM; space-time codes; Decision feedback equalizers; Filters; Intersymbol interference; Iterative algorithms; Iterative decoding; Maximum likelihood decoding; Maximum likelihood estimation; Signal processing; Signal processing algorithms; Turbo codes;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03). 2003 IEEE International Conference on

ISSN

1520-6149

Print_ISBN

0-7803-7663-3

Type

conf

DOI

10.1109/ICASSP.2003.1202670

Filename

1202670