并且描述了超声波测距的物理基础和理论基础。
And describes the physical basis and ultrasound ranging theoretical basis.
利用有一定间距的两部声纳基阵提供的目标方位和时延差的信息，实现对目标的被动测距。建立了测距物理模型，给出了后置距离滤波算法。
In this paper, we introduce passive ranging of target based on the bearings and time-delay information of dual arrays and filtering algorithm of ranging.
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