Title :
BEM-based SISO detection of space-time block coded signals transmitted over frequency-flat fading channels
Author :
Chiavaccini, E. ; Gallo, A.S. ; Muratori, F. ; Vitetta, G.M.
Author_Institution :
Dept. of Inf. Eng., Modena Univ., Italy
Abstract :
In this paper the expectation-maximization (EM) algorithm for maximum a posteriori (MAP) estimation of a random vector is applied to the problem of detection of space-time block coded (STBC) signals over time-selective Rayleigh fading channels. This results in a soft-in soft-out (SISO) 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 :
Bayes methods; Rayleigh channels; block codes; channel coding; maximum likelihood detection; maximum likelihood estimation; mobile radio; optimisation; space-time codes; BEM; Bayesian EM algorithm; MAP detector; MAP estimation; SISO detection; STBC signals; channel state knowledge; error performance; expectation-maximization algorithm; fading rate; frequency-flat fading channels; iterative decoding; iterative detection; maximum a posteriori estimation; random vector; soft-in soft-out detection; space-time block coded signals; time-selective Rayleigh fading channels; Detection algorithms; Detectors; Fading; Frequency; Iterative algorithms; Iterative decoding; Maximum likelihood decoding; Maximum likelihood estimation; Receiving antennas; Signal processing algorithms;
Conference_Titel :
Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE
Print_ISBN :
0-7803-7632-3
DOI :
10.1109/GLOCOM.2002.1188104
