GNSS World of China

Volume 48 Issue 3
Jun.  2023
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JIA Qiongqiong, ZHU Chuansheng. Multipath interference detection method for vector receivers based on joint multi-channel SQM metrics[J]. GNSS World of China, 2023, 48(3): 110-119. doi: 10.12265/j.gnss.2023037
Citation: JIA Qiongqiong, ZHU Chuansheng. Multipath interference detection method for vector receivers based on joint multi-channel SQM metrics[J]. GNSS World of China, 2023, 48(3): 110-119. doi: 10.12265/j.gnss.2023037
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Multipath interference detection method for vector receivers based on joint multi-channel SQM metrics

doi: 10.12265/j.gnss.2023037

  • Tianjin Key Laboratory for Advanced Signal Processing, Civil Aviation University of China, Tianjin 300300, China

  • Received Date: 2023-03-08
    Abstract
  • Vector receivers provide better performance in complex environments than traditional scalar receivers by sharing information between tracking channels to assist each other. However, multipath interference can severely limit the performance of vector receivers in complex environments such as urban canyons, and the effects of multipath can be eliminated if it is detected and dealt with in a timely manner. This paper researches multipath detection based on signal quality monitoring (SQM) from the perspective of the mechanism of multipath effects on vector receivers. Firstly, this paper proposes a multipath detection method for vector receivers with joint multi-channel SQM metrics, based on the analysis of existing SQM metrics for scalar receiver signals, combined with the characteristics of vector receiver channel coupling. Finally, this paper verifis through simulation experiments that the proposed method can effectively detect multipath with amplitude ratio less than 0.5 and the relative code delay in the range of 0.3–0.6 chips.

     

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