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Published in:
2020 | OriginalPaper | Chapter
Pseudorandom Code Error Monitoring Method for GNSS Signal
Authors : Yi Yang, Lin Chen, Yuqi Liu, Shaobin Guo
Published in: China Satellite Navigation Conference (CSNC) 2020 Proceedings: Volume I
Publisher: Springer Singapore
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Abstract
Pseudorandom code error of GNSS signal could degrade user receiver’s data demodulation and ranging performance, it is usually caused by unexpected behaviour within the logic circuits of navigation signal generation in satellite payload. Due to the complexity of modernized GNSS signal structure, real-time pseudorandom code error monitoring has become an important and challenging issue. A novel method is proposed in this paper, by appending several calculation steps into conventional receiver’s signal tracking loop and with the external aid of navigation message, rapid detection of GNSS single spreading code error can be realized. The simulation result shows that by taking this method, accidental pseudorandom code error can be instantly detected regardless of various code chip waveforms and multiplexing schemes, and it’s applicable for both public and authorized signals. This method can be applied to the design of Satellite Autonomous Integrity Monitoring (SAIM) payload.