基于纯方位的浅海距离特征量解算分析

目标辐射噪声的LOFAR图中的干涉条纹包含了目标的运动参数和环境信息。当LOFAR图中的干涉条纹模糊或缺失时,其中的目标距离信息将无法提取。对于匀速直线运动的声源目标,仅利用方位信息,通过构造距离特征量和目标方位的关系模型,给出了一种浅海估计距离特征量的补充方法。浅海数值仿真和实验验证表明了该方法的可行性和有效性。

Analysis of distance characteristic variable solved based on bearings-only in shallow sea

Range-frequency striations, which appearing in plots of Low-Frequency Array (LOFAR) spectrum of target radiated noise, include the information of target motion parameters and environment variables. When missing the striations of LOFAR spectrum, the information of target distance will not be obtained. For a sound source target in shallow sea with constant velocity along a straight line, using the information of bearings-only, a supplementary method of estimating distance characteristic variable is given by constructing the relationship between distance characteristic variable and target bearings. Numerical results and experimental verification in shallow sea show that the method is feasible and effective.