Systems Engineering and Electronics ›› 2021, Vol. 43 ›› Issue (9): 2573-2580.doi: 10.12305/j.issn.1001-506X.2021.09.25

• Guidance, Navigation and Control • Previous Articles     Next Articles

Processing technology of discontinuous satellite navigation signal under rotating condition

Heliang YUAN1,*, Tian JIN1, Jiaqing QU2, Hongli LYU3   

  1. 1. School of Electronics and Information Engineering, Beihang University, Beijing 100083, China
    2. Shanghai Radio Equipment Research Institute, Shanghai 201109, China
    3. Xi'an Research Institute of Navigation Technology, Xi'an 710068, China
  • Received:2021-01-28 Online:2021-08-20 Published:2021-08-26
  • Contact: Heliang YUAN

Abstract:

Aiming at the problem that the traditional satellite navigation technology is unable to estimate the roll rate of the spinning vehicle, and the discontinuity of satellite signal caused by rotation makes the estimation of positioning more difficult. A tracking and positioning method based on the combination of open-loop tracking and differential Kalman filter with multi antenna structure is proposed. And roll rate is estimated by Doppler difference between adjacent antennas. In this paper, the open-loop structure without feedback loop and snap-shot mode is used to track the discontinuous signal. Differential Kalman filter is modeled by the difference between adjacent epochs to eliminate the common error in the observation and realize the fusion filtering and positioning. Finally, the roll rate is estimated by Doppler difference between adjacent antennas. Experiments based on both simulation signal and real signal show that the proposed algorithm can track satellite signal continuously and obtain high-precision positioning. The standard deviation of the roll rate error is less than 1 rps.

Key words: satellite navigation, rotation discontinuity, open-loop tracking, differential Kalman filter, roll rate estimation

CLC Number: 

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