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双星时差频差定位系统中的多信号定位技术
龙宁,曹广平,王勤果
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(中国西南电子技术研究所，成都 610036)

摘要:

通过计算并分析多信号的互模糊函数，证明了双星时差频差定位系统同频多信号定位的可行性；提出了计算双星定位系统可同时分辨的同频信号个数的公式，估算了卫星系统的同频多信号分辨能力，并给出了同频多信号互模糊函数图；最后,提出了一种多信号定位高效实现方法，其思想是先估计信号个数，再计算局部区域互模糊函数。该方法已得到了工程验证。

关键词: 双星定位时差频差同频多信号定位

DOI：

基金项目:

Multi-signal localization technique for dual-satellite geolocation system using TDOA and FDOA

LONG Ning,CAO Guang-ping,WANG Qin-guo

(Southwest China Institute of Electronic Technology,Chengdu 610036, China)

Abstract:

By computing and analysing cross ambiguity function of multisignals,the feasib ility of same frequency multisignal localization in dualsatellite passive ge olocation system using TDOA (time difference) and FDOA (frequency difference) is proved. F urther more, a formula to compute the number of resolving same frequency multi signal at one time is put forward in dualsatellite passive geolocation system. In succession, the same f requency multisignal′s resolving power for the satellite system is estimated and the same frequency multisignal′s cross ambiguity function figure is presented.Fina lly, a high effect realization method for multisignal localization is brought forw ard in which signal number is first estimated and local area′s cross ambiguity function is t hen computed. The method has been validated in engineering.

Key words: dual satellite geolocation TDOA FDOA same frequenc y multi signal localization