电磁干扰对GPS双频接收机定位精度的影响

Influence of GPS Dual-Frequency Receiver Positioning Precision for Electromagnetic Jamming

分析了载频干扰对GPS定位精度影响的基本原理。通过设置不同的载频干扰环境,检验了双频GPS接收机在L_1和L_2载频干扰下的定位精度。同时通过分析记录卫星信号信噪比和伪距误差的变化以及双频接收机电离层修正误差,对干扰导致的接收机定位误差原因进行了分析。从而为现有GPS接收机在复杂电磁环境下的使用和事后数据处理提供了依据和参考。

The basic principle of influence of carrier frequency jamming to GPS positioning accuracy was analyzed in this paper, the positioning accuracy of dual-frequency GPS receiver was tested under L, and L2 carrier frequency jamming by setting different carrier frequency jamming environment. At the same time, the reasons of receiver loca- tion error caused by jamming were analyzed through analyzing satellite signal SNR, the change of pseudorange er- rors and dual-band receiver ionospheric correction error, and the conclusions can be provided as basis and refer- ence for the use of the existing GPS receivers in complex electromagnetic environment and post data processing.