Asynchronous full-diversity high-rate coding scheme for cooperative relay networks

In previous works on two-relay two-hop asynchronous cooperative networks we showed that, based on outage probability derivation, sending the same information frame by the two relays with a relative delay ensures a diversity order of two. In this paper, we propose a new practical asynchronous distributed coding scheme. This code performs a combination of the symbols with constellation rotation and gives better error rate performance than other codes. We also prove that it achieves full-diversity and high-rate.