基于卫星导航信号模拟仿真法的北斗接收机导航精度校准测试

随着我国自主设计的北斗卫星导航系统稳步建设,北斗接收机相关技术取得突破,但当前北斗接收机校准体系尚不完善,相关测试方法亟待研究。本文提出卫星导航信号模拟测试法,通过多星座导航信号模拟器设计静态、动态等仿真场景模拟相关载体运动状态下真实的卫星信号,实现对北斗接收机在相关载体运动状态下导航精度的校准测试。该方法具有准确度高、简单易操作和重复性强等优点,可实现实验室条件下检测接收机性能。实验结果表明:北斗系统的定位和测速精度已基本接近GPS系统,但就系统的稳定性,北斗系统与GPS系统相比还存在一定差距。

Research on Simulation and Calibration of BeiDou Receiver on GNSS Simulator

With the steady construction and development of BeiDou Navigation Satellite System, the related technology of BeiDou receivers has made a breakthrough. The current calibration system of BeiDou receivers is not perfect, and the relevant methods must be studied. This paper proposes a simulation test based on satellite navigation signal. Through the multi constellation navigation signal simulator, static and dynamic sce-narios were designed to simulate the movement of real satellite navigation signals. The method can realize a calibration test of BeiDou receivers’ navigation precision in different carriers. The method can not only take the advantages of high accuracy, easy operation and repeatability, but al-so can realize the comprehensive testing of BeiDou receivers in the laboratory condition. The experimental results show that the measurement accu-racy of position and velocity in BeiDou has been basically closed to GPS’ s, but there is a certain gap on the stability between BeiDou and GPS.