基于惯导辅助的GNSS完好性检测方法研究

INTEGRITY MONITORING TECHNIQUE OF GNSS BASED ON INS

为了提高GNSS完好性,提出一种顾及载波多普勒平滑伪距技术的INS辅助GNSS完好性检测方法。该算法通过运用载波多普勒平滑伪距技术,降低了随机误差的影响,利用INS估算的伪距、伪距率与平滑后的GNSS原始观测信息构造奇偶矢量进行故障检测和隔离。仿真结果表明,基于惯性导航辅助的GNSS完好性检测算法可以提高故障检测概率,当顾及载波多普勒平滑伪距技术时,故障检测性能更优。

In order to improve GNSS integrity, a new integrity monitoring method of GNSS aided by INS with considering the phase Doppler smoothing code is proposed. In this algorithm, by the use of phase Doppler smoothing code to reduce the random error, the parity vector can be obtained by using measurement derived from INS and GNSS for fault detection and isolation. The simulative results show that the integrity monitoring method of GNSS aided by INS can increase the fault detection rate, when considering the phase Doppler smoothing code the performance improvement is more significant.