Variable Subarray Beamforming in Low Earth Orbit Satellite Feeder Link MIMO
In the future low earth orbit (LEO) satellite constellation system in the 6G era, it is essential to increase the feeder link capacity. MIMO (Multiple-Input Multiple-Output) transmission is attracting attention as a method to increase the capacity. In the case of MIMO transmission in LEO satellite f...
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| Format: | Article |
| Language: | English |
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IEEE
2025-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/10833614/ |
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| author | Koyo Tategami Daisuke Goto Kiyohiko Itokawa Fumihiro Yamashita |
| author_facet | Koyo Tategami Daisuke Goto Kiyohiko Itokawa Fumihiro Yamashita |
| author_sort | Koyo Tategami |
| collection | DOAJ |
| description | In the future low earth orbit (LEO) satellite constellation system in the 6G era, it is essential to increase the feeder link capacity. MIMO (Multiple-Input Multiple-Output) transmission is attracting attention as a method to increase the capacity. In the case of MIMO transmission in LEO satellite feeder links, the channel transmission capacity degradation due to satellite movement and the degradation of transmission quality due to an increase in the peak-to-average power ratio (PAPR) during beamforming at the satellite side are issues that need to be resolved. This paper proposes variable subarray beamforming (VS-BF) for MIMO transmission in LEO satellite feeder links, which reduces transmission quality degradation due to PAPR and improves capacity. This paper shows that the proposed method improves channel capacity by a factor of 2 compared to the conventional method with fixed subarrays and reduces the required output backoff by 2 dB achieving BER <inline-formula> <tex-math notation="LaTeX">$= 10^{-4}$ </tex-math></inline-formula> compared to full array beamforming by computer simulations. |
| format | Article |
| id | doaj-art-a7b075af70cf4a56afa48d1667cd161e |
| institution | Kabale University |
| issn | 2169-3536 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj-art-a7b075af70cf4a56afa48d1667cd161e2025-01-21T00:01:20ZengIEEEIEEE Access2169-35362025-01-01137208722210.1109/ACCESS.2025.352696410833614Variable Subarray Beamforming in Low Earth Orbit Satellite Feeder Link MIMOKoyo Tategami0https://orcid.org/0009-0001-3795-3839Daisuke Goto1https://orcid.org/0000-0003-2069-3767Kiyohiko Itokawa2https://orcid.org/0009-0004-3264-3825Fumihiro Yamashita3https://orcid.org/0009-0006-0966-7989NTT Access Network Service Systems Laboratories, NTT Corporation, Yokosuka, JapanNTT Access Network Service Systems Laboratories, NTT Corporation, Yokosuka, JapanNTT Access Network Service Systems Laboratories, NTT Corporation, Yokosuka, JapanNTT Access Network Service Systems Laboratories, NTT Corporation, Yokosuka, JapanIn the future low earth orbit (LEO) satellite constellation system in the 6G era, it is essential to increase the feeder link capacity. MIMO (Multiple-Input Multiple-Output) transmission is attracting attention as a method to increase the capacity. In the case of MIMO transmission in LEO satellite feeder links, the channel transmission capacity degradation due to satellite movement and the degradation of transmission quality due to an increase in the peak-to-average power ratio (PAPR) during beamforming at the satellite side are issues that need to be resolved. This paper proposes variable subarray beamforming (VS-BF) for MIMO transmission in LEO satellite feeder links, which reduces transmission quality degradation due to PAPR and improves capacity. This paper shows that the proposed method improves channel capacity by a factor of 2 compared to the conventional method with fixed subarrays and reduces the required output backoff by 2 dB achieving BER <inline-formula> <tex-math notation="LaTeX">$= 10^{-4}$ </tex-math></inline-formula> compared to full array beamforming by computer simulations.https://ieeexplore.ieee.org/document/10833614/Low earth orbit satelliteMIMOfeeder linkbeamformingsubarray |
| spellingShingle | Koyo Tategami Daisuke Goto Kiyohiko Itokawa Fumihiro Yamashita Variable Subarray Beamforming in Low Earth Orbit Satellite Feeder Link MIMO IEEE Access Low earth orbit satellite MIMO feeder link beamforming subarray |
| title | Variable Subarray Beamforming in Low Earth Orbit Satellite Feeder Link MIMO |
| title_full | Variable Subarray Beamforming in Low Earth Orbit Satellite Feeder Link MIMO |
| title_fullStr | Variable Subarray Beamforming in Low Earth Orbit Satellite Feeder Link MIMO |
| title_full_unstemmed | Variable Subarray Beamforming in Low Earth Orbit Satellite Feeder Link MIMO |
| title_short | Variable Subarray Beamforming in Low Earth Orbit Satellite Feeder Link MIMO |
| title_sort | variable subarray beamforming in low earth orbit satellite feeder link mimo |
| topic | Low earth orbit satellite MIMO feeder link beamforming subarray |
| url | https://ieeexplore.ieee.org/document/10833614/ |
| work_keys_str_mv | AT koyotategami variablesubarraybeamforminginlowearthorbitsatellitefeederlinkmimo AT daisukegoto variablesubarraybeamforminginlowearthorbitsatellitefeederlinkmimo AT kiyohikoitokawa variablesubarraybeamforminginlowearthorbitsatellitefeederlinkmimo AT fumihiroyamashita variablesubarraybeamforminginlowearthorbitsatellitefeederlinkmimo |