Full inter-relay self interference cancellation for a four relay cooperative network

We propose the use of simple full inter-relay self interference cancellation (FSIC) at the relay nodes within a four relay network. The four single antenna relay nodes are arranged as two spatially well separated groups of two relays with offset transmission scheduling. This approach can achieve the full available distributed diversity order and its end-to-end transmission rate can asymptotically approach one when the number of samples is large. Pairwise error probability analysis is used to confirm the available diversity and simulation studies are employed to verify the end-to-end bit error rate (BER) as a function of the level of inter-relay interference.