多通道运动声呐混响仿真

提出了一种直观,易于实现的方法完成多通道声呐混响信号的仿真,采用空间非均匀方式分布散射元,直接对散射元的回波信号进行迭加。仿真综合考虑了多种影响混响的因素,包括发射信号本身的参数,声呐平台的运动,海洋环境等。对仿真信号的平均混响级,瞬时值和包络值概率密度分布,空间相关系数,空时二维谱几个方面进行了检验,结果与理论分析和经验值具有较好的一致性,证明了仿真的有效性。该仿真数据能够满足空时自适应处理(STAP)方法研究的需要。

Simulation of multi-channel moving sonar reverberation

An intuitive and easy-implemented approach of simulation of multi-channel sonar reverberation is proposed,which uses the nonuniform distribution of scatters in space and the direct superposition of the scatters' echoes.Many factors which will influence the reverberation are considered in the simulation such as the parameters of transmission signal,the motion of the platform,the ocean environment,etc.The simulated signal's average reverberation level,distribution of probability density of transient value and envelope,spatial correlative coefficient,space-time spectrum are tested,and the results are consistent with the theoretical analysis and the experience well.The validity of the simulation is proved.The simulated data can meet the demand of research on space-time adaptive processing(STAP).