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http://dx.doi.org/10.5139/JKSAS.2019.47.5.388

Radio Frequency Interference on the GNSS Receiver due to S-band Signals  

Kwon, Byung-Moon (KSLV-II R&D Head Office, Korea Aerospace Research Institute)
Shin, Yong-Sul (KSLV-II R&D Head Office, Korea Aerospace Research Institute)
Ma, Keun-Su (KSLV-II R&D Head Office, Korea Aerospace Research Institute)
Ju, Jeong-Gab (Alternative Navigation Division, Navcours Co., Ltd.)
Ji, Ki-Man (KSLV-II R&D Head Office, Korea Aerospace Research Institute)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.47, no.5, 2019 , pp. 388-396 More about this Journal
Abstract
This paper describes the RF(Radio Frequency) interference on the GNSS receiver due to the S-band signals transmitted from the transmitters in the Test Launch Vehicle, and analyzes the cause of the RF interference. Due to the S-band signals that have relatively high power levels compared with GNSS signals, an LNA(Low Noise Amplifier) in the active GNSS antenna was saturated, and the intermodulation signal within GNSS in-bands was produced in the LNA whenever two S-band signals were received from the GNSS antenna. For these reasons, the C/N0 of the satellite signals in the GNSS receiver was attenuated severely. The design of the LNA was changed in order to protect the RF interference due to the S-band signals and the suppression capability of the RF interference was confirmed in the new LNA through the comparison of the old LNA.
Keywords
GNSS; Interference; Saturation; Intermodulation; Space Launch Vehicle; Low Noise Amplifier;
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Times Cited By KSCI : 2  (Citation Analysis)
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