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Volume 26 Issue 2
Feb.  2000
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Journal of Beijing University of Aeronautics and Astronautics  > 2000  >  26(2): 129-132.
LI Xiao-min, LIU Hui, CHENG Lee-lung, et al. Precise Estimation Method of Pseudo Random Code Delay of Spread Spectrum System in High Dynamic Environment[J]. Journal of Beijing University of Aeronautics and Astronautics, 2000, 26(2): 129-132. (in Chinese)
Citation: LI Xiao-min, LIU Hui, CHENG Lee-lung, et al. Precise Estimation Method of Pseudo Random Code Delay of Spread Spectrum System in High Dynamic Environment[J]. Journal of Beijing University of Aeronautics and Astronautics, 2000, 26(2): 129-132. (in Chinese)
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Precise Estimation Method of Pseudo Random Code Delay of Spread Spectrum System in High Dynamic Environment

  • Beijing University of Aeronautics and Astronautics,Dept. of Electronic Engineering

  • Received Date: 09 Sep 1998
  • Publish Date: 29 Feb 2000
    Abstract
  • The problems met in high dynamic environment during direct spread spectrum system measuring pseudo-random (PN) code delay are analyzed, and the effect of Doppler frequency shifted on PN code delay is studied emphatically. Carrier phase and frequency of high dynamic direct spread spectrum signal are estimated through extended Kalman filter (EKF) algorithm. The PN delay loop is adjusted through measuring the varied value of carrier phase with carrier aiding technology. The effect of Doppler shift on PN code delay is reduced through carrier aiding technology. The precise delay estimation is obtained. The dynamic tracking performance of the PN delay loop is improved.

     

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  • [1] 王晓湘GPS接收机的参数估计及应用处理研究 北京:北京理工大学电子工程系,1998 [2]Hurd W J, Statman J I, Vilnrotter V A． High dynamic GPS receiver using maximum likelihood estimation and frequency tracking[J]． IEEE Transaction on AES, 1987, 23(4):425~436． [3]Zhuang W. Digital baseband processor for the GPS receiver modeling and simulation[J]． IEEE Transaction on AES, 1993, 29(4):1343~1349． [4]Agurre S, Hinedi S. Two novel automatic frequency tracking loops[J]. IEEE Transaction on AES, 1989, 25(5):749~760． [5]宋文尧,张 牙.卡尔曼滤波[M].北京:科学出版社,1991.
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