双星定位系统改进方案与仿真研究

文章在考虑将系统改进到被动无源的单向测距模式时，提出在现有双星系统基础上增加伪卫星伪距观测量的两种改进方案，并对两种方案中的伪卫星进行最佳配置；通过两种双星系统的改进方案与原系统的对比分析，证明双星定位系统中增加伪卫星的方法可以改善系统的性能和定位精度。

Improved Scheme and Simulation of Double-star Positioning System

Double-star positioning system has its disadvantages because the mode of the system is active two-way ranging, such as user's position is easily exposed to enemies, the time delay, and so on. So passive ranging mode is considered to improve the double-star positioning system. Two improved schemes with adding pseudo-satellite based on the actuality to get more observed quantities are presented in this paper and optimum layout of the pseudo-satellites is also pointed out. When the position of pseudo-satellites is in optimum condition, it can be proved that the way that adding pseudo-satellites in the double-star positioning system can really improve the precision of position by comparison and analysis.