GNSS World of China

Volume 46 Issue 6
Dec.  2021
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LI Xianghao, CHEN Feiqiang, LU Zukun, LIU Zhe, HAN Chunyang, OU Gang. Analysis of the influence of time-domain anti-interference on correlation peaks under channel characteristics[J]. GNSS World of China, 2021, 46(6): 55-62. doi: 10.12265/j.gnss.2021012902
Citation: LI Xianghao, CHEN Feiqiang, LU Zukun, LIU Zhe, HAN Chunyang, OU Gang. Analysis of the influence of time-domain anti-interference on correlation peaks under channel characteristics[J]. GNSS World of China, 2021, 46(6): 55-62. doi: 10.12265/j.gnss.2021012902
shu

Analysis of the influence of time-domain anti-interference on correlation peaks under channel characteristics

doi: 10.12265/j.gnss.2021012902
  • 1.

    Navigation and Space-Time Technology Engineering Research Center, College of Electronic Science, National University of Defense Technology, Changsha 410073, China

  • 2.

    Beijing Satellite Navigation Center, Beijing 100084, China

  • Received Date: 2021-01-29
    Available Online: 2021-12-17
    Abstract
  • Due to the non-ideal characteristics of analog components such as antennas and RF front-ends, ranging errors will occur in the Global Navigation Satellite System (GNSS) receiver. At present, the deviation of the ranging value caused by the traditional anti-jamming algorithm has become the main obstacle to the improvement of the accuracy of high-precision ranging receiver. In this paper, theoretical derivation proves that when the channel characteristics are ideal, the correlation function will still be asymmetric due to the time-varying characteristics of the anti-jamming filter coefficients under iteration and the uncertainty of the interference auto correlation value. When the channel characteristics are not ideal, the traditional time-domain anti-jamming algorithm based on a single antenna will further deteriorate the originally asymmetrical correlation peak distortion. It is proved that under the non-ideal channel characteristics, the asymmetric correlation peak distortion caused by the time-domain anti-interference filter is further deteriorated due to the superposition effect of the correlation functions of each delay.

     

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