Multirate diagonal-space-time-interleaved coded modulation for non-ergodic block fading channels

We present a multirate coded layered space-time system, where each of the antennas is encoded independently with different rates and then space-time layered according to a diagonal-space-time interleaver (DSTI). We investigate the performance of the proposed multirate-DSTI system subject to successive decoding receivers in quasistatic fading channel environments. This scheme assumes that the receiver has access to perfect channel-state information (CSI). Numerical results are presented illustrating the superior outage capacity performance of the multirate-DSTI scheme compared to V-BLAST. Based on these results, a multirate-DSTI system is designed using the punctured turbo codes proposed in 3GPP wireless standards. Simulation results show significant gains in bit error-rate (BER) and packet error-rate (PER) performances compared to that of V-BLAST.