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.
BEM-based SISO detection of space-time block coded signals transmitted over frequency-flat fading channels / Chiavaccini, Eugenio; Gallo, Antonio Stanislao; Muratori, Fabrizio; Vitetta, Giorgio Matteo. - STAMPA. - 1:(2002), pp. 374-378. (Intervento presentato al convegno IEEE Global Telecommunications Conference, 2002 (GLOBECOM '02) tenutosi a Taipei, twn nel 17-21 Nov., 2002).
BEM-based SISO detection of space-time block coded signals transmitted over frequency-flat fading channels
CHIAVACCINI, Eugenio;GALLO, Antonio Stanislao;MURATORI, Fabrizio;VITETTA, Giorgio Matteo
2002
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.
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