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| Eliminating TDOA Location Ambiguity of High PRF Signal Based on Direction Information Acquired |
| Ren Wen-juan①②③ Hu Dong-hui①② Ding Chi-biao①② Niu Ben①②③ |
| ①Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China ②Key Laboratory of Technology in Geo-spatial Information Processing and Application System, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China ③Graduate University of the Chinese Academy of Sciences, Beijing 100190, China |
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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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Received: 22 December 2009
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Corresponding Authors:
Ren Wen-juan
E-mail: renandliang@sina.com
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2010, Vol. 32 
