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Effects of channel-estimation errors on receiver selection-combining schemes for Alamouti MIMO systems with BPSK

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2 Author(s)
Wenyu Li ; Dept. of Electr. & Comput. Eng., Univ. of Alberta, Edmonton, Canada ; Beaulieu, N.C.

The bit-error rate (BER) of binary phase-shift keying in Rayleigh fading, using the Alamouti transmission scheme and receiver selection diversity in the presence of channel-estimation error, is studied. Closed-form expressions for the BER of log-likelihood ratio selection, signal-to-noise ratio (SNR) selection, switch-and-stay combining selection, and maximum ratio combining are derived in terms of the SNR and the cross-correlation coefficient of the channel gain and its corrupted estimate. Two new selection schemes, space-time sum-of-squares combining selection diversity and space-time sum-of-magnitudes selection diversity, are proposed and proven to provide almost the same performance as SNR selection, but with much simpler implementations. The effects of channel-estimation errors on each selection scheme are examined.

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Communications, IEEE Transactions on  (Volume:54 ,  Issue: 1 )