Phase Compensation for Uplink Distributed Space-Time Cooperative Protocol

Distributed space-time coding (DSTC) cooperation for wireless relay network has been widely analyzed. In this paper, we first investigate an uplink DSTC cooperative system based on amplify-and-forward (AF) cooperation protocol with multiple antennas deployed at the destination while source and relay nodes have only one antenna each. Then, by exploiting partial channel state information from the source to relay nodes, we propose a phase compensation algorithm which can achieve linear detection at the receiver. Furthermore, the complexity analysis is provided to compare with nonlinear optimal ML detection. Finally, computer simulations are carried out to evaluate the validity of the proposed approach. The results show that the phase compensation algorithm can approximately achieve the same performance with nonlinear ML algorithm. On the other hand, it can significantly simply the heavy complexity of the optimal ML detection into simple linear detection with very low complexity. With near optimal performance and low complexity, the proposed algorithm is particularly suitable for the practical scenarios.