BEM-based SISO detection of orthogonal space-time block codes over frequency flat-fading channels

Authors:
A. S. Gallo;E. Chiavaccini;F. Muratori;G. M. Vitetta
Affiliations:
Dept. of Inf. Eng., Univ. of Modena & Reggio Emilia, Italy;-;-;-
Venue:
IEEE Transactions on Wireless Communications
Year:
2004

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Wireless Personal Communications: An International Journal

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Abstract

The expectation-maximization algorithm for maximum a posteriori (MAP) estimation of a random vector is applied to the problem of detection of orthogonal space-time block codes over time-selective Rayleigh fading channels. This results in a soft-in soft-out detection algorithm suitable for iterative detection/decoding schemes. Simulation results show that the error performance of the proposed detection algorithm is very close to that of a MAP detector endowed with an ideal knowledge of the channel state if the fading rate is not too fast.