Adaptive Interference Suppression and FPGA Implementation for Active Sonar Detection

Abstract

Active sonar is used for target detection in the bistatic detection system. When the target approaches or crosses the source-receiver line, the direct blast will cause serious interference in the received signal. The adaptive filtering algorithm is used to suppress the interference such as direct blast, and it is implemented on FPGA by System Generator. The results show that the adaptive filter can effectively suppress the direct blast, and the forward scattering signal submerged in direct blast can be displayed, and underwater target can be detected.