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

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4 Author(s)
Gallo, A.S. ; Dept. of Inf. Eng., Univ. of Modena & Reggio Emilia, Italy ; Chiavaccini, E. ; Muratori, F. ; Vitetta, G.M.

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.

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Wireless Communications, IEEE Transactions on  (Volume:3 ,  Issue: 6 )