压制式干扰对北斗接收机授时性能的影响评估  

Evaluation of the Influence of Suppression Jamming on Beidou Receiver Timing Accuracy

作　　者：刘瑞华 周童 刘亮 LIU Ruihua;ZHOU Tong;LIU Liang(College of Electronic Information and Automation,Civil Aviation University of China,Tianjin 300300,China;The 54th Research Institute of CETC,Shijiazhuang 050081,China)

机构地区：[1]中国民航大学电子信息与自动化学院,天津300300 [2]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电工程》2023年第9期2125-2134,共10页Radio Engineering

基　　金：国家重点研发计划(2021YFF0603903)。

摘　　要：为了确认北斗卫星导航接收机在压制式干扰影响下的授时性能,针对卫星导航信号的捕获、跟踪以及解调过程,进行了相关授时精度的评估。基于不同模块的功能划分,给出了衡量不同带宽干扰对接收机影响的6个关键指标,并采用时间精度因子和伪距测量方差2个误差参数计算了干扰条件下的接收机授时精度。仿真结果表明,不同带宽干扰对北斗接收机授时精度影响不同,窄带干扰带来的跟踪误差比宽带干扰高约5 ns。随着干信比的增加,窄带干扰带来的授时误差还将成倍增加,相关研究结果可以为北斗授时服务精度在干扰条件下的评估提供技术参考。To verify the timing performance of Beidou satellite navigation receiver under the influence of suppression-type jamming,the relevant timing accuracy is evaluated for the capture,tracking and demodulation processes of satellite navigation signals.Based on the functional division of different modules,six key indicators are given to measure the impact of interference with different bandwidths on the receiver,and two error parameters,i.e.time accuracy factor and pseudo-range measurement variance,which are used to calculate the timing accuracy of the receiver under interference conditions.The simulation results show that interference with different bandwidths has different effects on the timing accuracy of Beidou receiver,and the tracking error caused by narrowband interference is about 5 ns higher than that caused by wideband interference.As the interference signal ratio increases,the time service error caused by narrowband interference will increase exponentially.The relevant research results provide a technical reference for the evaluation of Beidou time service accuracy under interference conditions.

关 键 词：北斗接收机 捕获性能 跟踪环路 精度因子 授时精度 

分 类 号：TN972[电子电信—信号与信息处理]