Dynamic Coded Cooperation With Incremental Redundancy: Throughput and Diversity-Multiplexing Tradeoff Analysis

In cooperative communications, dynamic decode-and-forward transmission with rateless coding (RC-DDF) is most efficient in reaching/approaching channel capacity. However, it entails strict carrier synchronization among the source, relay and destination, making it hard to implement in practice. To remove the limitation, we propose a scheme named dynamic coded cooperation with incremental redundancy (DCCIR) where nodes transmit alternatively and thus no strict carrier synchronization is needed. Its performance is investigated in terms of both throughput and diversity-multiplexing tradeoff (DMT). Moreover, we present a subframe-based implementation structure for DCCIR (sub-DCCIR) to obtain the DMT of DCCIR. The results reveal performance advantages of DCCIR or sub-DCCIR over several existing schemes and its approximation to RC-DDF.