摘要
通过计算时差、频差测量精度，以及卫星运动引起的时差、频差变化率，提出双星时差频差无源定位系统的信号最佳采样时间为10～100ms。进一步推导了工程可实现的定位精度，仿真结果表明双星系统工程可实现的定位精度约为1～3km。研究和结论对双星定位系统定位精度指标的论证与分解具有借鉴意义。
By computing the measurement precision of TDOA（Time Difference of Arrival） and FDOA（Frequency Difference of Arrival）, TDOA and FDOA＇s change rate caused by satellite＇s movement,this paper puts forward that the best signal sampling time is 10- 100 ms in Dual-satellite Passive Geolocation System using TDOA and FDOA. Further more, localization precision of engineering realization is deduced. Simulation results show that localization precision is about 1 - 3 km. The research and conclusion can provide reference for demonstration and analysis of localization precision index of dual-satellite passive geolocation system.
出处
《电讯技术》
北大核心
2011年第7期34-37,共4页
Telecommunication Engineering
关键词
双星定位
时差
频差
工程实现
信号采样时间
定位精度
dual-satellite geolocation
TDOA
FDOA
engineering realization
signal sampling time
localizationprecision
