Tight BER bounds for iteratively decoded bit-interleaved space-time coded modulation

摘要

Iteratively decoded bit-interleaved space-time coded modulation (BI-STCM) greatly lowers bit error rate (BER) over fast Rayleigh fading multiple-input multiple-output (MIMO) channels. We develop a general, tight and efficient theoretical error-free feedback bound (EF bound) to analyze the asymptotic BER. The convergence to the EF bound and the accuracy of the prediction are verified by simulation. With the best rate 1/2 4-state convolutional code and the 16-QAM modified set partitioning labeling, the BER of 10/sup -6/ can be achieved at E/sub b//N/sub 0/=1.6 dB with 2 transmit and 2 receive antennas.