| Project/Area Number |
18560382
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Communication/Network engineering
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| Research Institution | Hokkaido Institute of Technology |
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Principal Investigator |
HATSUDA Takeshi Hokkaido Institute of Technology, 工学部, 非常勤講師 (10198757)
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| Co-Investigator(Kenkyū-buntansha) |
MAEKAWA Yasuyuki 大阪電気通信大学, 工学部, 教授 (30181572)
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| Project Period (FY) |
2006 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥630,000)
Fiscal Year 2009: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2008: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2007: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2006: ¥1,300,000 (Direct Cost: ¥1,300,000)
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| Keywords | 固定衛星業務 / Ku(14 / 12GHz)帯 / Ka(30 / 20GHz)帯 / ダイバーシティ方式 / 時間遅延ダイバーシティ方式 / サテライトダイバーシティ方式 / 時間遅延 / Ku帯衛星通信方式 / 時間遅延ダイバーシティ(TDD)方式 / サテライトダイバーシティ(Sat. D) / 回線稼動率 / 通信方式 / 衛星通信方式 / サテライトダイバーシティ / 時間遅延ダイバーシティ / Ku バンド / サテライトダイバーシティ(Sat.D) / 回線稼働率 |
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| Research Abstract |
This study deals with the Ku-band Time-Delayed Diversity/Satellite Diversity (TDD/Sat.D) system, which is combination of a TDD system and a Sat.D system to overcome heavy rain attenuation in the Ku-band Fixed Satellite Service (FSS) systems. To verify the characteristics of the TDD/Sat.D system, propagation experiments are carried out the rain attenuation data measured and processed for assess the system characteristic. From the calculated results, it can be clarified that by using the TDD/Sat.D system, the satellite link unavailability time percentage can be improved by approximately 1/10 with a delay time τ=10～20 minutes.
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