一种基于相频函数关系的双基时差定位方法
A Double Station Time Difference Location Method Based on Function Relationship between Phase Shift and Doppler Shift

作者: 郁 涛 :上海微波设备研究所,上海;

关键词: 多站时差定位相差定位多普勒定位测距机载无源定位Multistation Time Difference Location Phase Difference Location Doppler Location Ranging Air-borne Passive Location

摘要:
基于相、频、时三者之间的函数关系,提出了一种有助于改善现有多站时差无源定位性能的定位算法。相对于现有的平面三站时差定位方法,这种先通过频移到相差的函数变换,再利用相差和时差间的关系,将原先仅能用于机载的测距公式转化为与探测平台运动状态无关的双基时差定位方法具有更高的测量精度,避免了对高重频信号测量的定位解模糊,同时相距较远的两主基站间的时间基准可以要求不同步,这无疑有利于站址的选择。仿真结果验证了该算法的有效性。

Abstract:
This paper presents a location algorithm which can help to improve existing performance of multistation time difference location based on the function relationship among phase shift, Doppler shift and time difference. New method uses the relationship between phase difference and time difference based on the function transforms from Doppler shift into phase shift. Finally, the ranging formula that only can apply to airborne platform can be translated into the double station time difference location method which is not associated with the motion state of detection platform. As compared to existing three stations time difference location method in two-dimension plane, the double station time difference location method can heighten measurement accuracy and avoid the time difference ambiguity introduced by high PRF signal. At the same time, it also has the characteristics that the time reference between two major base stations can be deranged, and that looking for the building position of base station is more convenient. Simulation result proves the availability of the algorithm.

文章引用: 郁 涛 (2013) 一种基于相频函数关系的双基时差定位方法。 国际航空航天科学, 1, 13-18. doi: 10.12677/JAST.2013.13003

参考文献

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[2] 江翔 (2008) 无源时差定位技术及应用研究. 电子科技大学, 成都.

[3] 敖伟 (2009) 无源定位方法及其精度研究. 电子科技大学, 成都.

[4] Yu, T. (2012) Airborne passive location method based on Doppler-phase interference measurement. InTech Publisher, Chapter 7, 133-168.

[5] Yu, T. (2012) Airborne passive location method based on Doppler-phase difference measuring. Advanced in Mathematical and Computational Methods, 3, 85-91.

[6] 郁涛 (2012) 基于基线扩展的相差定位. 中国电子科学研究院学报, 6, 650-654.

[7] 郁涛 (2012) 一维双基线相位干涉测向公式的准确解. 天线学报, 1, 8-11.

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