收发合置情况下海底混响仿真

Research on Simulating Seafloor Reverberation in the Case of Monostatic

为了实现收发合置情况下海底混响时间序列仿真,提出了一种混合模型方法。该方法将点散射模型方法与单元散射模型方法混合使用,既能够克服单元散射模型方法中高斯分布假设带来的计算误差,又能够克服点散射模型方法计算复杂的问题。针对窄带发射信号,为了便于计算,设计了一种适用于任意采样率的基于复包络的混响信号仿真方法。最后,通过仿真试验证实了仿真方法的有效性。

In order to simulate seafloor reverberation time series in the case of monostatic, the mixed model method is presented, using the point-scatterer model method and the patch-scatterer model method alternately. This method can not only overcome computational errors caused by the Gaussian distribution assumption in the patch-scatterer model method, but also decrease computational complexities of the point-scatterer model method. In order to simulate narrowband reverberation time series easily, the simulation method designed based on simulating reverberation complex envelop, which is feasible for any sampling frequency. Finally, the validity of the simulation method is verified by the simulation test.