模拟深海采矿环境下混响的局部平稳性分析

针对深海采矿环境中强混响干扰下目标回波提取困难的问题,提出了海底强混响环境的模拟方法,在此基础上建立了采矿模拟环境中混响干扰的AR模型,并利用建立的AR模型计算了模拟环境中信号的Itakura距离.以建立的AR模型及Itakura距离为基础,建立了海底强混响仿真模型,对不同Itakura距离下的仿真信号及己知Itakura距离的大量实验数据分段预白化处理.仿真和实验数据处理结果表明模拟采矿环境下混响具有局部平稳性.

Reverberation Local Stationarity Analysis of the Simulation Mining Environment

It is known that the target echoes extraction is difficult under the intense reverberation interference for deep-sea mining environment.So a new simulation method of bottom reverberation environment is proposed and the reverberation interference of AR model in the simulation environment of mining is set up based on this simulation method.Then the signal's Itakura distance is calculated under the simulation environment by using the AR model.The bottom reverberation simulation model is established which is based on the AR model and Itakura distance.Then signals with different Itakura distance are detected using the pre-whiten processing,as well as a lot of experimental data of known Itakura distance.The processing results of simulation and experimental data show the reverberation under the simulated mining environment has local stationary.