Abstract:Underwater active acoustic detection is one of the main techniques for underwater target detection. Its target echo signal simulation technology plays an important role in the defense and civil fields of development, combat operation and training of underwater combat defense, sonar, underwater weapon, and underwater target detection system. Aiming at common CW and LFM active acoustic detection signals, the reconstruction technology of moving target’s echo signal waveforms is studied. Under the con- dition that the active acoustic detection pulse is captured, the basic method of “waveform storage retransmission” is used to reset the echo signal sampling frequency according to the relative motion speed of the moving target, thereby the Doppler shift simulation of broadband echo signal (LFM signal) and narrowband echo signal (CW signal) is realized. According to the target echo delay infor- mation, the simulation method of target echo delay reconstruction is given. The reference of target intensity parameter setting is giv- en according to different target types and incident orientations.
