Performance of a Novel Relay-STBC-HARQ for Cooperative MIMO System

In 2-hop relay communication system,the first hop mainly gets the diversity gain while the second hop gets the cooperative gain. While the HARQ can get the time diversity gain,space-time block coding can get a trade of diversity gain and multiplex gain,it is significant to combine the HARQ and STBC in a cooperative MIMO system that multi-antenna come from cooperative relay nodes. According to analysis the relationship between the VBLAST,HARQ and STBC,a novel Relay-STBC-HARQ was proposed. The algorithm performs well in the performance simulation that can improve the system capacity by spatial multiplex gain and cooperative gain. This means credible coverage and a flexible tradeoff among BER rate,code rate and delay.