Electromagnetic Interference Issues of Aircraft Radio Altimeters Due to Sub-6 Band 5G Mobile Communications Systems in Japan

Electromagnetic interference (EMI) issues of the aircraft radio altimeter (RA) due to Sub-6 band 5G mobile communication system in Japan is discussed based on the experimental results. Sub-6 band 5G mobile commutation systems have been adopted globally. However, in Japan, the guard band between RAs...

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Published in2024 IEEE Joint International Symposium on Electromagnetic Compatibility, Signal & Power Integrity: EMC Japan / Asia-Pacific International Symposium on Electromagnetic Compatibility (EMC Japan/APEMC Okinawa) pp. 45 - 48
Main Authors Futatsumori, Shunichi, Hiraga, Noriaki
Format Conference Proceeding
LanguageEnglish
Published Institute of Electronics, Information and Communication Engineers 20.05.2024
Subjects
5G mobile communication
5G mobile commutation system
Aircraft
Airports
Base stations
Electromagnetic compatibility
Electromagnetic interference
guard band
radio altimeter
Safety
spectrum sharing
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Summary:Electromagnetic interference (EMI) issues of the aircraft radio altimeter (RA) due to Sub-6 band 5G mobile communication system in Japan is discussed based on the experimental results. Sub-6 band 5G mobile commutation systems have been adopted globally. However, in Japan, the guard band between RAs and 5G mobile commutation systems is 100 MHz, which is lower than that in most other countries. In this study, we investigated EMI in aircraft RAs due to Sub-6 band 5G mobile communication systems in Japan. First, the EMI characteristics of RAs are measured under a narrow guard band. Next, the interference tolerance mask (ITM) is calculated from the measured interference thresholds. Finally, the obtained ITMs are compared with those reported under wider guard bands. The results confirm that Japan has a higher risk of interference than the United States and France because of the narrower guard band in Japan.
ISSN:2640-7469
DOI:10.23919/EMCJapan/APEMCOkinaw58965.2024.10584838