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。
By computing and analysing cross ambiguity function of multi-signals, the feasibility of same frequency multi-signal localization in dual-satellite passive geolocation system using TDOA （time difference） and FDOA （frequency difference） is proved. Further 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 fre- quency multi-signal＇s resolving power for the satellite system is estimated and the same frequency multi-signal＇s cross ambiguity function figure is presented. Finally, a high effect realization method for multi-signal localization is brought forward in which signal number is first estimated and local area＇s cross ambiguity function is then computed. The method has been validated in engineering.
出处
《电讯技术》
北大核心
2011年第2期16-20,共5页
Telecommunication Engineering
关键词
双星定位
时差
频差
同频多信号定位
dual-satellite geolocation
TDOA
FDOA
same frequency multi-signal localization
