地基伪卫星导航系统的伪距精度估计方法

地基伪卫星导航系统的伪距和伪距变率精度对评估系统的导航性能或其信息与其他系统导航信息的融合意义重大。目前的伪距和伪距变率精度估计方法基本上都是针对卫星导航系统的,并且没有充分考虑地基伪卫星导航系统自身的特点。通过构造伪距和伪距变率精度观测量,利用地基伪卫星导航系统可产生较差定位构型的特点,提出了一种在外测系统定位定速精度较差且存在杆臂长度的情况下仍然能够获取准确估计量的伪距和伪距精度估计方法。仿真结果表明所提方法可有效地估计出伪距和伪距变率的精度而且具有较强的适用性。

The Evaluation method of Pseudo Range Precision for Ground-Based Pseudolite Navigation System

The precision of pseudo range and doppler from ground-based pseudolite navigation system is very important to evaluate the systems performance and be fused with the navigation information from other system. At present, the evaluation methods of pseudo range precision is basically for satellite navigation system so they could not utilize the characteristic fully when used for ground-based pseudolite navigation system. By constructing the precision observations of pseudo range and doppler and utilizing some bad geometric configuration situations, this paper propose a precision evaluation method for pseudo range and doppler, which can get accurate precision evaluates even with large errors from external position and velocity and arm length. The simulation results indicate that the method can evaluate the precision of pseudo range and doppler effectively and have a strong application.