Performance of Belief Propagation Space-Time Coded Modulation with Iterative Decoding over Quasi-Stationary Fading MIMO Channel
XU Da-zhuan · Nanjing Hangkong Hangtian Daxue xuebao · 2005
To combine low-density parity-check (LDPC) codes wit h space-time block codes (STBC), a scheme for belief propagation space time coded modulation with iterative decoding (BPSTCM-ID) is proposed. The pair error pro bability performance in quasi-stationary fading MIMO channel and design rules f or multiple quadrature amplitude modulation (MQAM) constellations are also analy zed. Both outer and inner iterations are used to avoid too much error feedback w hich may cause decoding failures. The scheme introduces check equations of LDPC codes to terminate both iterations, thus reducing the average decoding complexit ies. Simulation results show that the BPSTCM-ID is effective and its performanc e is better than that of the other three schemes.