利用测向信息消除高重复频率信号的时差定位模糊
doi: 10.3724/SP.J.1146.2009.01618
Eliminating TDOA Location Ambiguity of High PRF Signal Based on Direction Information Acquired
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摘要: 该文针对三星时差定位系统对高重复频率信号的定位模糊问题，提出在主星增加干涉仪测向并结合测向信息解模糊的思路。由于干涉仪本身有可能出现测向模糊，进一步提出了根据模糊测向信息解时差定位模糊的方法，其在无测向模糊时同样适用。该方法定义了时差定位点的距离参数，通过对其做门限检测去除虚假时差定位点，从而有效地减少了模糊定位点数量，改善了对高重频信号的定位模糊问题。Abstract: For the issue of location ambiguity of high PRF(Pulse Repetition Frequency) signal in three satellites TDOA (Time Difference Of Arrival) passive location system, a new method based on direction information acquired by adding interferometer on main satellite is presented in this paper. Considering ambiguity may occur in direction finding with interferometer, a method is proposed to eliminate location ambiguity by using ambiguous direction information, which is also practicable without ambiguity in direction finding. Firstly, the distance parameter defined in this method of every location is computed, and then false locations are eliminated by threshold detection. This method is able to reduce the number of ambiguous locations, and improve location ambiguity effectively.
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