Title :
BEM-based SISO detection of orthogonal space-time block codes over frequency flat-fading channels
Author :
Gallo, A.S. ; Chiavaccini, E. ; Muratori, F. ; Vitetta, G.M.
Author_Institution :
Dept. of Inf. Eng., Univ. of Modena & Reggio Emilia, Italy
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.
Keywords :
Rayleigh channels; block codes; iterative decoding; maximum likelihood estimation; space-time codes; dubbed Bayesian expectation-maximization algorithm; frequency flat-fading channel; iterative decoding scheme; iterative detection scheme; maximum a posteriori estimation; orthogonal space-time block code; random vector; soft-in soft-out detection algorithm; time-selective Rayleigh fading channel; Block codes; Detection algorithms; Detectors; Fading; Frequency estimation; Iterative decoding; Maximum likelihood decoding; Rayleigh channels; Receiving antennas; Signal processing algorithms;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2004.837412
