基于非误差建模的高动态GNSS矢量跟踪环路

High Dynamic GNSS Vector Tracking Loop Based on Non-error State Model

针对卫星导航矢量跟踪算法中载波环路存在较大加速度动态应力误差的问题,提出了基于非误差建模的高动态GNSS矢量跟踪环路。该环路在对载体位置和速度进行误差状态量建模的基础上,对加速度进行非误差状态量建模,通过对载体加速度的估算,修正了载体加速运动导致的载波环路动态应力误差。仿真测试结果表明,该环路能够在不影响接收机灵敏度的情况下,实现对更高动态载体的跟踪。

In order to solve the dynamic stress error of carrier loops caused by accelerated motion,a high dynamic GNSS vector tracking loop based on non-error modeling was proposed.Based on the error modeling of the position and velocity of the carrier,the loop was modeled by the non-error state of the acceleration.The dynamic stress error of the carrier loop was corrected by estimating the carrier acceleration.The simulation results showed that the loop could track the higher dynamic carrier without affecting the receiver sensitivity.