基于水声多普勒频移特性的TBD时空联合蛙人探测方法研究

本项目采用理论仿真结合试验验证的方式，开展基于水声多普勒频移特性的TBD时空联合蛙人探测方法研究。首先在分析混响频率扩展的基础上，解决满足蛙人探测的多普勒超敏感信号设计问题；其次对基于水声多普勒频移特性的蛙人探测方法的可行性进行仿真结合试验验证；再次解决频移失配对混响统计模型的影响问题；最终突破基于多普勒频移-距离-方位-时间四维图像序列的TBD时空联合蛙人探测技术。项目研究意义在于：由于蛙人与雷达目标的运动速度的量级差别，使得已广泛应用于雷达领域的基于多普勒特性探测方法在蛙人探测领域未被重视，本项目从仿真和试验角度验证该方法的可行性和优越性，并突破相关关键技术，提高基于多普勒频移特性蛙人探测性能，促进蛙人探测声纳及其探测技术的发展。

Combining theoretical simulation with experiment validation, the research of TBD spatio-temporal union diver detection method based on the underwater acoustic Doppler shift characteristic is proposed. Firstly, the Doppler ultra-sensitive signal is designed to meet the diver detection under the analysis of the reverberation frequency extension. Secondly, the feasibility validation of diver detection method based on Doppler shift characteristic is verified by simulation combined with experiment. Thirdly, the effect problem of reverberation statistical model due to the frequency shift mismatch is solved. Finally, the diver detection technique based on Doppler shift-distance-azimuth-time 4-D image sequence TBD spatio-temporal union detection method is broken through. The significance of the proposed research: due to the velocity magnitude difference between diver and radar target, the detection method based on the Doppler shift characteristic had not been taken seriously in the diver detect area. In this research, the feasibility and superiority of the method is verified by the simulation and experiment, and the related key techniques are broken through to improve the diver detection performance based on Doppler shift characteristic. It promotes the development of anti-diver sonar and diver detection technique.