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中文摘要：
研究了鱼雷被动测距的多普勒方法。首先介绍了多普勒理论并推导了距离估计公式。然后通过建立水下物体的运动模型,详细推导了运动声源直达波和反射波多普勒频率的计算方法。最后仿真分析了典型运动情况下直达波和反射波的多普勒频率变化情况、多普勒频率差随着方位角和接收阵深度变化的情况,以及测距误差随着频率估计误差变化等。
英文摘要：
Passive ranging of torpedo using Doppler method is studied in this paper.First,Doppler theory is introduced and a range estimation formula is deduced.Then,the calculation methods for the Doppler frequency of direct-arrival signal and surface-reflection signal by establishing an underwater object movement model are formularized in detail.Last,several simulation experiments of variation on the Doppler effects of direct-arrival signal and surface-reflection signal of typical movement,the variation of Doppler Frequency Differences（DFD） between direct-arrival signal and surface-reflection signal with different bearing angles and receiving array depths are carried out and the range estimation error varying with frequency estimation error is also studied.
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