主动声纳阵的混响仿真及检验

Modeling and Simulation of Space-time Reverberation for Active Sonar Array

研究海洋混响的干扰检验问题,由于真实的混响数据信息难获取,混响仿真中不能体现声纳信号形式、平台运动、海洋环境的问题,针对传统方法不能准确检验混响情况,提出了一种基于HODGKISS单元散射理论的海洋混响的阵列模型,把过去单一阵元的混响仿真推广到整个阵列的混响仿真,并考虑了发射波形、发射信号形式、声纳平台运动以及海洋环境等参数,使仿真条件尽量接近真实环境。最后,通过仿真比较瞬时值和包络概率密度分布、空时二维谱几个方面的特性,实验证明了模型及混响仿真结果的准确性和有效性。

Considering nowadays the lack of reverberation model for array signal processing and the problem of simplistic simulation, which cannot reflect the sonar signal, platform motion and ocean environment, this paper pres- ents an intuitive and easy approach based on HODGKISS＇ cell scattering theory, which uses the distribution of seat- ters in space. This approach is applicable to arbitrary transmission waveforms, and many factors, such as the parame- ters of transmission signals, the motion of the platform, and the ocean environment, are taken into account. Finally, the validity of the simulation is proved through comparing the characteristics of simulated data＇ s space-time coupling and distribution of orobabilitv density of transient value and envelope.