干扰对卫星导航接收机跟踪性能的影响分析  

Research on the impact of jamming on tracking performance for global navigation satellite system receivers

作　　者：李武涛 黄智刚[1] 肖宏 LI Wu-tao;HUANG Zhi-gang;XIAO Hong(School of Electronic and Information Engineering,Beihang University,Beijing 100191,China;China Ship Research & Design Center,Wuhan 430064,China)

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191 [2]中国舰船研究设计中心,湖北武汉430064

出　　处：《电子设计工程》2019年第8期119-123,共5页Electronic Design Engineering

摘　　要：卫星导航系统具有固有脆弱性,易受干扰。首先从理论上分析了压制式干扰对卫星导航接收机跟踪环路性能的影响,得出卫星导航接收机跟踪环路在压制式干扰的影响下,载波相位输出紊乱、载噪比随干扰功率增大而降低、码相位波动变大、定位精度降低直至不能定位的结论。在实际室外环境中,利用自主研制的接收机和信号质量监测软件实际测试了干扰对接收机的影响。实验中利用拟合相关曲线指标分析了干扰对载波相位造成的影响;利用码相位延迟、相关函数曲线和SCB曲线分析了干扰对码相位造成的影响,实验分析结果与理论分析结果一致。Global Navigation Satellite System(GNSS)is inherently vulnerable to interference.In this paper,the theoretical analysis of suppressing jamming’s effect on the tracking performance of the GNSS receiver is done,concluding that the GNSS receivers’tracking loop under jammers will export disordered carrier phase and the carrier to noise ratio decreases with the interference’s power increasing,with code phase fluctuating a lot and positioning accuracy declining until the receiver cannot position.In the practical test,the fitting correlation curve index is utilized to monitor the influence of interference on carrier phase while code delay index,the correlation function curve and SCB curve are adopted to watch the effect of jammers on code phase,which is consistent with the theoretical results.

关 键 词：卫星导航 压制式干扰 跟踪环路 载波相位 码相位 

分 类 号：TN967[电子电信—信号与信息处理]