三星时差和多普勒频差联合定位精度分析

Joint Location Precision Analysis Based on TDOA and FDOA of Three Satellite

在推导三星时差（TDOA）和多普勒频差（FDOA）无源定位精度的基础上，分析了布站基线长度、基线夹角、站址误差，测量误差、目标高程误差等因素对定位精度的影响，并将时差定位与多普勒频差定位结合起来联合分析，仿真结果表明，时差频差无源联合定位精度较单独时差或单独频差的性能明显提高，工程应用时还应根据不同需求合理选择布站方式。

While deduceding the precision of TDOA and FDOA for three satellite passive location system, it analyzes the relationship between the positioning precision and the length of baseline, the angle of baseline, the observation station error, the measurement precision and the height assumption error. The result of simulation shows that the joint method can improve the precision evidently. The mode of observation station can be selected according to the different engineering application.