Multiple relay selection scheme for underwater acoustic cooperative communication based on steady-state mean-square-error threshold

Abstract

A multiple relay selection scheme for underwater acoustic cooperative communication is proposed. In the scheme, the steady-state mean-square-error (SMSE) of each relayed path is used to order the relays, and then the relay with smaller steady-state mean-square-error (SMSE) value will be more preferential to participate in cooperation. Simulation results demonstrate that the proposed scheme can adaptively select the number of relay nodes to cooperate by the threshold, and it has a lower bit error rate (BER) compared with existing counterparts.