A dual relay transmission system for wireless communications: Power allocations and channel capacity

Cooperative relaying methods have attracted a lot of interest in the past several years. A conventional cooperative relaying scheme has a source, destination and a single relay. To overcome the effects of asymmetrical nature of one relay network, we have proposed a dual relay system that achieves significant system performance in terms of bit-error rate, signal-to-noise ratio and channel capacity over the conventional one relay and direct transmission systems. This paper presents the protocol of the dual relay system and addresses the issues of optimal power allocations at the terminals and the increase of system performance in terms of channel capacity.