高斯干扰下GNSS信号码跟踪精度分析

doi:10.11896/jsjkx.190100193

计算机科学 ›› 2020, Vol. 47 ›› Issue (1): 245-251.doi: 10.11896/jsjkx.190100193

高斯干扰下GNSS信号码跟踪精度分析

叶旅洋^1,2,3,樊战友^1,2,张瀚青^1,2,3,刘岩^1,2,3,武文俊^1,2,胡永辉^1,2

(中国科学院国家授时中心西安710600)¹;
(中国科学院精密导航定位与定时技术重点实验室西安710600)²;
(中国科学院大学电子电气与通信工程学院北京100049)³

收稿日期:2019-01-23 发布日期:2020-01-19
通讯作者: 樊战友(fan@ntsc.ac.cn)
基金资助:
国家自然科学基金项目(11703030,10773012);中国科学院西部青年学者项目(XAB2017A06);北斗军用定时终端检定规程(Y833ZX1601)

Analysis of GNSS Signal Code Tracking Accuracy Under Gauss Interference

YE Lv-yang^1,2,3,FAN Zhan-you^1,2,ZHANG Han-qing^1,2,3,LIU Yan^1,2,3,WU Wen-jun^1,2,HU Yong-hui^1,2

(National Time Service Center,Chinese Academy of Science,Xi’an 710600,China)¹;
(Key Laboratory of Precision Navigation Positioning and Timing Technology,CAS,Xi’an 710600,China)²;
(School of Electronic,Electrical and Communication Engineering,University of Chinese Academy of Sciences,Beijing 100049,China)³

Received:2019-01-23 Published:2020-01-19
About author:ZHONG Xu-dong,born in 1991.He is now a doctoral candidate and an engineer.His research concerns resource management for satellite networks;HE Yuan-zhi,born in 1974.She is now a Research Fellow with Ph.D.degree.Her research concerns satellite communications and cognitive satellite networks.
Supported by:
This work was supported by the National Natural Science Foundation of China (11703030,10773012),Western Youth Scholars Fund of the Chinese Academy of Sciences (XAB2017A06) and Beidou Military Timing Terminal Fund (Y833ZX1601).

摘要/Abstract

摘要： 码跟踪精度是导航系统兼容互操作评估的重要参数。为定量分析高斯干扰下GNSS信号的码跟踪精度,从常见的高斯干扰信号出发,针对CELP,NELP及DP环路模型,基于MATLAB软件对GNSS信号的码跟踪精度进行仿真分析,并给出了NELP及DP环路的CT-SSC表达式,同时对环路模型的CT-SSC及Cramer-Rao下界进行分析。仿真结果表明:在相同条件下,GNSS信号的码跟踪误差受高斯窄带干扰及宽带干扰比较明显,而在一定信干比范围内,受高斯匹配谱干扰和带限白干扰比较稳定;在DP环路下,GNSS信号的CT-SSC三维曲面较CELP及NELP显得“平滑”,相应的跟踪性能也最好。对GNSS信号的码跟踪性能进行分析,有助于给GNSS系统的兼容与互操作评估及现代GNSS接收机的设计提供重要参考;给出的NELP及DP的码CT-SSC表达式,可作为与CELP的CT-SSC进行并行分析的参照依据。

关键词: Cramer-Rao界, CT-SSC, GNSS, 高斯干扰, 码跟踪

Abstract: Code tracking accuracy is an important parameter for the compatibility interoperability evaluation of navigation systems.In order to quantitatively analyze the code tracking accuracy of GNSS signals under Gaussian interference,starting from common Gaussian interference signals,the code tracking accuracy of GNSS signals was simulated and analyzed according to the MATLAB software,the CT-SSC expression of NELP and DP loop were given,the CT-SSC and Cramer-Rao lower bounds of the loop model were analyzed meanwhile.The simulation results show that the code tracking error of GNSS signals is more obvious by Gaussian-narrowband interference and wideband interference under the same conditions,while code tracking error of GNSS signal is more stable under Gauss matching spectrum interference and band-limited white interference in a certain signal-to-interference ratio range.Under the model of DP,the three-dimensional surface of GNSS signal is more “smooth” than CELP and NELP model in terms of CT-SSC,and the tracking performance is best.The tracking performance analysis of GNSS signals can provide an important reference for GNSS system on compatibility and interoperability assessment as well as modern GNSS recei-ver design,and the expressions of CT-SSC about NELP and DP model can be analysis parallel with CELP model.

Key words: Code tracking, Cramer-Rao boundary, CT-SSC, Gauss interference, GNSS

中图分类号:

TN961

叶旅洋,樊战友,张瀚青,刘岩,武文俊,胡永辉. 高斯干扰下GNSS信号码跟踪精度分析[J]. 计算机科学, 2020, 47(1): 245-251. https://doi.org/10.11896/jsjkx.190100193

YE Lv-yang,FAN Zhan-you,ZHANG Han-qing,LIU Yan,WU Wen-jun,HU Yong-hui. Analysis of GNSS Signal Code Tracking Accuracy Under Gauss Interference[J]. Computer Science, 2020, 47(1): 245-251. https://doi.org/10.11896/jsjkx.190100193

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高斯干扰下GNSS信号码跟踪精度分析

Analysis of GNSS Signal Code Tracking Accuracy Under Gauss Interference

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