一种单矢量水听器通道增益一致性分析方法  

A channel gain consistency analysis method for single vector hydrophone

作　　者：马艳 罗斌[1] 邵杨梦 MA Yan;LUO Bin;SHAO Yangmeng(Hangzhou Applied acoustics Research Institute,Hangzhou 310012,Zhejiang,China)

机构地区：[1]杭州应用声学研究所,浙江杭州310023

出　　处：《声学技术》2022年第4期624-629,共6页Technical Acoustics

摘　　要：单只矢量水听器通道增益一致性对空间谱估计结果有很大的影响。通过理论推导证明,当单矢量水听器声压通道增益不同于两路振速通道时,最小方差无失真响应(Minimum Variance Distortionless Response,MVDR)算法空间谱谱峰变宽,并且可能产生伪峰;当一路振速通道增益不同于另外两路通道时,MVDR算法空间谱估计值与真实值存在偏差,且可能存在伪峰,仿真分析验证了理论推导的正确性。根据分析结果,结合通道增益一致性对多重信号分类(Multiple Signal Classification,MUSIC)算法的影响,提出了一种判断单矢量水听器各通道增益一致性的分析方法。The channel gain consistency of a single vector hydrophone has great influence on the spectrum estimation results.In this paper,theoretical derivation and simulation analysis show that when the gain of the sound pressure channel is not consistent with two vibration velocity channels,the peak of space spectrum estimated by the minimum variance distortionless response(MVDR)algorithm becomes wider,and sometimes false peak appears,which seriously affects the performance of target azimuth estimation.When the gain of a vibration velocity channel is inconsistent with other two channels,the space spectrum estimated by the MVDR algorithm deviated from the true spectrum,and there may be false peaks to further reduce the azimuth resolution of the target.According to the analysis results,combined with the influence of channel gain consistency on the multiple signal classification(MUSIC)algorithm,an analysis method is proposed in this paper to judge whether the channel gain of single vector hydrophone is consistent or not.

关 键 词：单矢量水听器 幅度误差分析 空间谱估计 

分 类 号：TB566[交通运输工程—水声工程]