一种矢量跟踪环路及其抗干扰性能分析  

A Design Method and Anti-jamming Performance Analysis for Vector Tracking Loop

作　　者：王伟[1] 李强[1] 徐定杰[1] 沈锋[1] 

机构地区：[1]哈尔滨工程大学自动化学院,哈尔滨150001

出　　处：《电子与信息学报》2013年第7期1581-1586,共6页Journal of Electronics & Information Technology

基　　金：新世纪优秀人才支持计划(NCET-11-0827);国家自然科学基金(60704018)资助课题

摘　　要：针对GPS信号在接收端的功率较弱,接收机在载噪比低的环境中很容易受到其他信号的干扰,该文提出一种基于矢量跟踪环路的接收机设计方法,在跟踪环路环节对干扰信号进行抑制。以实际的伪距、伪距率误差为状态量,量测得到的伪距、伪距率误差为观测量构建跟踪环路滤波器,利用更新后的接收机位置,计算出接收机与可视卫星间的观测矢量,完成闭合反馈回路。接收机的信号跟踪与导航解算部分融合一体,改变了传统接收机的结构。对比分析标量和矢量跟踪环路的预测伪距方差,来研究矢量跟踪环路对干扰信号的抑制性能。采用实际卫星星历进行仿真实验,验证了矢量跟踪环路比标量跟踪环路的预测伪距方差小,抗干扰能力强。Due to the power of GPS signal is weak at the receiver,it is easy for receiver to be disturbed in lower carrier-to-noise power density ratio（） environment,a design method of vector tracking loop is proposed,that jamming signals are suppressed in the tracing loop.Actual pseudorange error and pseudorange-rate error are considered as statements,measured pseudorange errors and pseudorange-rate errors are used as measurement information for structure filter.After receiver position is updated,line-of-sight vectors between the receiver and visible satellites can be calculated,then tracking feedback loop is accomplished.The anti-jamming performance of vector tracking loop is analyzed through comparing the predicted pseudorange variance with scalar loop.Actual satellite ephemeris is collected for simulation experiment,the results show that the predicted pseudorange variance of vector tracking loop is lower and the anti-jamming performance is better than the scalar loop.

关 键 词：全球定位系统(GPS) 矢量跟踪 KALMAN滤波器 观测矢量 抗干扰 

分 类 号：TN966[电子电信—信号与信息处理]