Simulation of Bistatic Detection Echoes and Performance

With the improvement of submarine stealth performance, traditional single-base sonar has limited detection range and can no longer meet the needs of submarine detection. Nowadays, more submarine detections are carried out using multiple platforms in a coordinated manner, and the bistatic (multistatic) base sonar, where one platform transmits and the others receive, is a key technology. This article is based on the modeling and simulation of the output signals of the bistatic receiving array to verify the performance of the bistatic detection system. First, a simulation receiver signal model framework for bistatic detection waveform level simulation is constructed, and simulated noise is obtained by extending measured hydrophone noise of finite length. The channel impulse response is obtained through the calculation of sound rays using HJRAYD software, and the waveform of underwater target echo at the output of the bistatic base receiver array is simulated. Then, a target detection method is used on the received signal array in the time domain followed by the spatial domain to obtain the distance and bearing of the target.