Investigation on In-band Interference Effect and Out-of-band Interference Mechanism of B1I Navigation Receiver

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Date
2021-09
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Mark
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Společnost pro radioelektronické inženýrství
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Abstract
Aiming at the problem that the Beidou B1I navi¬gation receiver is susceptible to continuous-wave interfer¬ence (CWI), it is of great significance to investigate the interference effect and mechanism of the B1I navigation receiver. With the threshold of carrier-to-noise ratio (C/N0) as the criterion of satellite tracking missing, the CWI injection experiment is conducted on a kind of B1I navigation receiver. The results indicate that the power spectrum of the satellite signal affects the CWI's ability to interfere with each satellite. Then, a prediction model of satellite tracking loss under dual-frequency CWI is proposed, and the accuracy of the model is verified through experiments. The experiment results demonstrate that the power combination between the dual-frequency CWI is negatively correlated, and the error of this model is less than 2 dB. Finally, the sensitive frequency bands of the navigation receiver under out-of-band CWI are obtained through experiments. It is confirmed by theoretical and simulation analysis that the mixer is the main non-linear circuit generating these sensitive frequency bands. Furthermore, improving the selectivity of the radio frequency (RF) front-end circuit can enhance the performance of anti out-of-band interference.
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Citation
Radioengineering. 2021 vol. 30, č. 3, s. 584-592. ISSN 1210-2512
https://www.radioeng.cz/fulltexts/2021/21_03_0584_0592.pdf
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Peer-reviewed
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en
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Creative Commons Attribution 4.0 International license
http://creativecommons.org/licenses/by/4.0/
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