A passiveranging method, using focused beam-forming, has a good precision in near field.
介绍了一种近场高精度被动定位方法——聚焦波束形成声图定位。
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In this paper, we introduce passiveranging of target based on the bearings and time-delay information of dual arrays and filtering algorithm of ranging.
The system of passiveranging SONAR makes use of the target noise received by the equipment which converts energy from one form to another to estimate the target distance.