一种改进的GNSS接收机完好性监测算法

An Improved Integrity Monitoring Algorithm for GNSS Receiver

针对传统GNSS接收机完好性监测算法由于可用性判断过程过于保守、误差保护水平值过大而导致算法可用性差的问题,优化了传统算法的可用性判断过程,根据卫星故障检测难度给出了漏检率的动态分配方法,以及相应的VPL计算方法。理论分析表明,上述改进方法可以在不降低总体完好性指标的同时最小化误差保护水平值,从而提高接收机完好性监测算法的可用性。仿真实验结果表明,改进后的GNSS接收机完好性监测算法的可用性比传统算法提高了1.5%~2.5%。

In view of the problem that the availability judgment process of traditional GNSS receiver integrity monitoring algorithm is too conservative,and the error protection level value is too large,resulting in poor availability,the availability judgment process of the traditional algorithm is optimized,the dynamic allocation method of the missed detection rate according to difficulty of satellite fault detection,and corresponding calculation method about VPL are given.Theoretical analysis shows that the above methods can minimize the error protection level value without reducing the overall integrity index to improve the usability of the receiver integrity monitoring algorithm.Simulation experiments results show that the usability of the improved GNSS receiver integrity monitoring algorithm is 1.5%~2.5%higher than traditional algorithm.