Systems Engineering and Electronics ›› 2021, Vol. 43 ›› Issue (9): 2588-2593.doi: 10.12305/j.issn.1001-506X.2021.09.27

• Guidance, Navigation and Control • Previous Articles     Next Articles

Investigation on the effect law and prediction method of out-of-band electromagnetic interference in navigation receiver

Qinglong ZHANG, Yuming WANG, Erwei CHENG, Yazhou CHEN*, Liyun MA   

  1. National Key Laboratory on Electromagnetic Environment Effects, Shijiazhuang Campus of Army Engineering University, Shijiazhuang 050003, China
  • Received:2020-09-25 Online:2021-08-20 Published:2021-08-26
  • Contact: Yazhou CHEN

Abstract:

Aiming at the problem the satellite navigation's positioning functions of unmanned equipment in complex electromagnetic environments are susceptible to electromagnetic interference (EMI), the effect of out-of-band EMI and the prediction model of out-of-band dual-frequency interference are proposed. Firstly, a prediction model of navigation receiver satellite tracking loss under dual-frequency EMI is derived, which is based on the mechanism of large-signal blocking interference. Secondly, through the single-source EMI effect experiment, the electromagnetic sensitivity threshold curve of different satellites was obtained, and the generation mechanism of other sensitive frequency bands except the main sensitive frequency band was analyzed. Finally, a dual-frequency EMI effect experiment was carried out, and the experimental data verified that the prediction error of the model was less than 2 dB, which provides a method for unmanned equipment to predict out-of-band EMI.

Key words: satellite navigation, out-of-band dual-frequency, electromagnetic sensitivity threshold, prediction method

CLC Number: 

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