Acoustic-Domain Self-Interference Cancellation for Full-Duplex Underwater Acoustic Communication Systems

Abstract

In full-duplex (FD) underwater acoustic communication (FD-UWAC) systems, the self-interference (SI) will affect the communication performance. Till now, there is no solution for active cancellation of the wide-band SI in the acoustic domain. In this paper, we propose such a solution with two transducers, a primary transducer and a secondary transducer. The acoustic signal emitted by the secondary transducer is generated to cancel the SI signal received at the hydrophone from the primary transducer. The performance of the proposed scheme is investigated by simulation. We use the Waymark UWA simulator that allows the virtual signal transmission in various acoustic environments. The simulation results demonstrate that the proposed scheme can provide an effective acoustic SI cancellation for FD-UWAC systems, in terms of the mean square error and bit error ratio.