1.Harbin Engineering University;2.Yichang Testing Technique Research Institute
Natural Science Foundation
Aiming at the self-interference cancellation technology of in-band full-duplex underwater acoustic communication, the self-interference cancellation method in analog domain or digital domain is often used to eliminate the self-interference signal. However, due to the problem of hardware equipment, there is an upper limit of self-interference cancellation performance. The self-interference cancellation in spatial domain is often completed by sound absorption barrier or directional transducer. Although the upper limit of self-interference cancellation is increased, it is more complicated in engineering application. The method has equipment dependence and limited cancellation ability. In order to further increase the upper limit of self-interference cancellation and reduce the complexity of self-interference cancellation method in spatial domain, this paper intends to complete self-interference cancellation in spatial domain based on array signal processing technology, and design a beamformer for the unique problems in in-band full-duplex underwater acoustic communication. The spatial filtering is used to suppress the self-interference signal and enhance the desired signal. The practicability and cancellation effect of this method are verified by simulation and pool experiments.