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The approximate equivalent relation in systems between time difference of arrival and Doppler is shown by comparing their observability degrees.
通过可观测度比较，还提示了到达时间差和多卜勒观测在系统中具有的拟等价关系。
Therefor, a single observer passive location method was proposed by using direction of arrival, phase difference rate-of-change, frequency and Doppler frequency rate-of-change in this paper.
为此，提出一种利用空频域信息的固定单站无源探测定位方法，利用波达方向、相位差变化率、载波频率及多普勒频率变化率实现对运动目标的无源定位。
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