INS辅助的PLL最优带宽设计及性能分析  

Optimal Bandwidth Design and Performance Analysis of INS-aided PLL

作　　者：汤霞清[1] 程旭维[1] 武萌[1] 高军强[1] 

机构地区：[1]装甲兵工程学院控制工程系,北京100072

出　　处：《装甲兵工程学院学报》2015年第3期75-80,共6页Journal of Academy of Armored Force Engineering

基　　金：军队科研计划项目

摘　　要：为实现对高动态和低载噪比信号的稳定跟踪,在全球导航卫星系统(Global Navigation Satellite System,GNSS)接收机的跟踪环路设计中采用惯性导航系统(Inertial Navigation System,INS)辅助锁相环(Phase Lock Loop,PLL)的环路结构。对INS辅助环路的各误差源进行了建模与分析,并分析了惯性器件精度对跟踪误差的影响。基于跟踪误差最小的原则设计了最优环路带宽,根据载波信号的载噪比和环路动态实时自适应地调整PLL带宽,使环路始终工作在最小误差状态。结果表明:所设计INS辅助的自适应带宽调节方法能有效减小环路跟踪误差,并提高复杂环境下信号的跟踪精度。In order to steadily track carrier signal under high dynamic or low C/N0 (Carrier to Noise Power Ratio)environments,during tracking loop of Global Navigation Satellite System (GNSS)receivers’de-sign stage,the Inertial Navigation System (INS)-aided Phase Lock Loop (PLL)structure is adopted. The error sources of the INS-aided PLL is built and the influence of inertial device’s accuracy on the tracking error is analyzed.Then,an optimal loop bandwidth design method is proposed based on the principle of minimizing the tracking error,and PLL bandwidth can be adjusted adaptively according to C/N0 of carrier signals to make the loop work all the time in minimum error state.The results show that the PLL tracking error is significantly decreased by aiding of INS,and the tracking accuracy is improved un-der challenged environments.

关 键 词：锁相环 最优带宽设计 惯性导航系统 跟踪误差 

分 类 号：TN96[电子电信—信号与信息处理] E96[电子电信—信息与通信工程]