高速运动目标产生结构振动噪声,其多普勒效应对相关信号处理的参数估计造成影响.双阵元垂直相关仪主要测量目标俯仰角,并对目标深度进行估计.由带通型限带白噪声的相关特性分析,推导了多普勒容限的理论计算公式,在积分时间较短的条件下可避免互相关损失.浅海多途信道将导致相关峰出现多峰现象,沿深度方向高速运动目标有助于抑制交叉峰.仿真结果表明,信号多普勒容限与理论分析一致,垂直相关仪的时域相关峰结构与实际目标及其界面镜像空间分布规律一致,因而有利于识别直达声信号,且目标深度测量误差控制在10 m内.%Targets with high speed generate structure vibration noises, and its Doppler effect has impact on the parameter estimation of correlation signal processing. Dual array element vertical correlator is mainly used for measuring pitch angles and estimating the depth of the target. By analyzing correlation characteristics of band-pass limit white noises, theoretical formula of Doppler tolerance is deduced, which the loss of cross-correlation can be avoided under the condition of shorter integration time. Multi-path channels in shallow waters will make correlation peak into multi-peak phenomenon, and targets moving at high-speed in the direction of the depth help to inhibit the cross peak. Simulation results show that signal Doppler tolerance is consistent with theoretical analysis and time-domain correlation peak structure of the vertical correlator is consistent with the spatial distribution rules of actual targets and its interface image, which is conducive to direct acoustic signal identification and the measurement error of the target depth is within 10 meters.
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