Computer Science

Computer Science ›› 2020, Vol. 47 ›› Issue (1): 245-251.doi: 10.11896/jsjkx.190100193

• Computer Network • Previous Articles     Next Articles

Analysis of GNSS Signal Code Tracking Accuracy Under Gauss Interference

YE Lv-yang1,2,3,FAN Zhan-you1,2,ZHANG Han-qing1,2,3,LIU Yan1,2,3,WU Wen-jun1,2,HU Yong-hui1,2   

  1. (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).

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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

CLC Number: 

  • TN961
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