A Distributed Space-Time Coding Scheme for Wireless Relay Networks

In this paper, two classes of cooperative protocols for wireless relay networks are considered. Both classes of protocols consist of two transmission phases: broadcasting phase and cooperating phase. Protocol I - In the broadcasting phase, the source only broadcasts to all potential relays; during the cooperating phase, only the relays communicate with the destination. Protocol II - During the broadcasting phase, the source broadcasts to its destination and relays; in the cooperating phase, it´s the same as that of Protocol I. The diagonal block orthogonal algebraic space-time (DBOAST) block codes designed to achieve full diversity over multiple-input-multiple-output (MIMO) channels is proven to achieve full cooperative diversity for the above protocols. Finally, we simulate the average bit error rate of the above two protocols with DBOAST code. And we compare the average bit error rate of DBOAST code with that of diagonal algebraic space-time (DAST) code.