LUT based self interference cancellation(L-SIC) in bidirectional relaying underwater acoustic communication system

A scheme of bidirectional relaying underwater acoustic communication is presented in this paper, which adopted two-way (on-frequency) amplify and forward relaying, is an emerging technology that allows doubling of system spectral efficiency. However, underwater acoustic channel is of serious multipath interference, which leads to great challenges to avoid the interference from mutual channel user. In this paper, we proposed a self interference cancellation algorithm based on Look-up Table(LUT), referred as L-SIC, for a two-user, asynchronous, bidirectional relaying underwater acoustic communication system by the available side-information from “echo” signal. Simulation results show that the performance of our proposed algorithm has lower SER and computation cost has been significantly reduced compared to full LUT method.