非同步伪卫星组网精密定位  

Precise positioning of non synchronous pseudolite network

作　　者：黄星 HUANG Xing(Guilin Normal College,Department of Physics and Engineering Technology,541004,China)

机构地区：[1]桂林师范高等专科学校,广西桂林541004

出　　处：《长江信息通信》2023年第7期49-51,55,共4页Changjiang Information & Communications

基　　金：2022年度广西高校中青年教师基础能力提升项目(2022KY0944)。

摘　　要：针对伪卫星组网定位系统中,各伪卫星间的时钟同步精度不高,难以完成定位的问题。文章提出一种非同步伪卫星定位方法,即采用现有测绘技术精确组网内各伪卫星的位置,组网区域内用户接收各伪卫星的测距信号,得到各伪卫星的位置信息、钟差信息以及载波相位数据,用户以伪卫星的测距信号和自身未知位置、本地钟差建立观测方程,通过在多个历元所接收到的不同测距信号,利用泰勒级数展开将这些观测方程线性化,最后通过这些线性化的方程组解算出用户的位置,完成对用户的高精度定位。In the pseudolite network positioning system,the clock synchronization accuracy between pseudolites is not high,so it is difficult to complete positioning.In this paper,a non synchronous pseudolite positioning method is proposed,that is,the existing surveying and mapping technology is used to accurately determine the position of each pseudolite.The users in the networking area receive the ranging signals of each pseudolite to obtain the position information,clock difference information and carrier phase data of each pseudolite.The users establish the observation equation based on the ranging signal of Pseudolite and their own unknown position and local clock difference,and through the different ranging signals received in multiple epochs,The Taylor series expansion is used to linearize these observation equations.Finally,the linearized equations are solved to calculate the user's position and complete the high-precision positioning of the user.

关 键 词：伪卫星 非同步 测距 多历元 线性化 

分 类 号：P228.4[天文地球—大地测量学与测量工程]