A robust vector tracking loop structure based on potential bias analysis  

作　　者：Qiongqiong JIA Yiran LUO Bing XU Li-Ta HSU Renbiao WU 

机构地区：[1]Tianjin Key Lab for Advanced Signal Processing,Civil Aviation University of China,Tianjin 300300,China [2]Interdisciplinary Division of Aeronautical and Aviation Engineering,The Hong Kong Polytechnic University,999077,Hong Kong,China [3]Department of Geomatics Engineering,University of Calgary,Calgary T2N1N4,Canada

出　　处：《Chinese Journal of Aeronautics》2024年第4期405-420,共16页中国航空学报（英文版）

基　　金：co-supported by the Scientific Research Program of Tianjin Municipal Education Commission, China (No. 2021KJ042);the Special Project of the National Science Foundation of China (No. U2133204)。

摘　　要：This paper proposes a robust vector tracking loop structure based on potential bias analysis. The influence of four kinds of biases on the existing two implementations of Vector Tracking Loops(VTLs) is illustrated by theoretical analysis and numerical simulations, and the following findings are obtained. Firstly, the initial user state bias leads to steady navigation solution bias in the relative VTL, while new measurements can eliminate it in the absolute VTL. Secondly, the initial code phase bias is transferred to the following navigation solutions in the relative VTL, while new measurements can eliminate it in the absolute VTL. Thirdly, the user state bias induced by erroneous navigation solution of VTLs can be eliminated by both of the two VTLs. Fourthly,the multipath/NLOS likely affects the two VTLs, and the induced tracking bias in the duration of the multipath/NLOS would decrease the performance of VTLs. Based on the above analysis,a robust VTL structure is proposed, where the absolute VTL is selected for its robustness to the two kinds of initialization biases;meanwhile, the instant bias detection and correction method is used to improve the performance of VTLs in the duration of the multipath/NLOS. Numerical simulations and experimental results verify the effectiveness of the proposed robust VTL structure.

关 键 词：Global Navigation Satellite System(GNSS) Vector Tracking Loop(VTL) MULTIPATH Non-Line-of-Sight(NLOS) Tracking bias propagation Least Absolute Shrinkage and Selection Operator(LASSO) 

分 类 号：TN967.1[电子电信—信号与信息处理]