Presentation 2019-10-11
Suppression of Sidelobe Level over Specific Points in S-band Assuming International Satellite Operation
Hiroaki Matsui, Osamu Yoshida, Kota Goto, Tsuyoshi Kuzumaki, Masahiko Sunagawa,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) In order to operate a communication satellite, international frequency coordination with neighboring countries is required. In that coordination, satellite operators may have to mitigate the sidelobe gain over specific areas in neighboring countries to reduce the interference with them. In our study to realize this, we simulated the beamforming with directionally constrained minimization of power (DCMP) method, which can reduce the sidelobe gain by constraint conditions. We tried to examine how much the sidelobe gain over specific points of Japanese neighbors can be lowered. Some cities are selected as example points in this study. As a result, we succeeded in lowering the sidelobe gain over some cities to 13dBi and the difference of it and peak value of mainlobe is greater than 33dB. This would be enough low sidelobe gain to operate satellite without harmful interference level.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Satellite communicationBeamformingDCMPDirectionally constrained minimization of power
Paper # SAT2019-58
Date of Issue 2019-10-03 (SAT)

Conference Information
Committee SAT
Conference Date 2019/10/10(2days)
Place (in Japanese) (See Japanese page)
Place (in English) JR HAKATA CITY {10F RoomA+B}
Topics (in Japanese) (See Japanese page)
Topics (in English)
Chair Fumihiro Yamashita(NTT)
Vice Chair Hisashi Sujikai(NHK) / Hiroyasu Ishikawa(Nihon Univ.)
Secretary Hisashi Sujikai(NTT) / Hiroyasu Ishikawa(NHK)
Assistant Shinobu Nanba(KDDI Research) / Takuya Okura(NICT)

Paper Information
Registration To Technical Committee on Satellite Telecommunications
Language ENG
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Suppression of Sidelobe Level over Specific Points in S-band Assuming International Satellite Operation
Sub Title (in English)
Keyword(1) Satellite communicationBeamformingDCMPDirectionally constrained minimization of power
1st Author's Name Hiroaki Matsui
1st Author's Affiliation SoftBank Corp.(SoftBank)
2nd Author's Name Osamu Yoshida
2nd Author's Affiliation SoftBank Corp.(SoftBank)
3rd Author's Name Kota Goto
3rd Author's Affiliation SoftBank Corp.(SoftBank)
4th Author's Name Tsuyoshi Kuzumaki
4th Author's Affiliation SoftBank Corp.(SoftBank)
5th Author's Name Masahiko Sunagawa
5th Author's Affiliation SoftBank Corp.(SoftBank)
Date 2019-10-11
Paper # SAT2019-58
Volume (vol) vol.119
Number (no) SAT-220
Page pp.pp.71-76(SAT),
#Pages 6
Date of Issue 2019-10-03 (SAT)