| Presentation | 2008/7/16 Improvement Factor of Ku-Band Satellite Diversity Effects Related to Rain Area Motion Yasuyuki MAEKAWA, Koichi SAWAI, Yoshiaki SHIBAGAKI, Tomoyuki TAKAMI, Takeshi HATSUDA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The effects of site diversity techniques on Ku-band rain attenuation are investigated using two sets of simultaneous satellite signal observations, which have been conducted among Osaka Electro-Communication University (OECU) in Neyagawa, Kyoto University in Uji, and Shigaraki MU Observatory in Koga for about past six years, and among the headquarters of OECU in Neyagawa and their other facilities in Shijonawate and Moriguchi for about past three years. The site diversity effects are found to be largely affected by the passing direction of rain areas characterized by each rain type, such as warm, cold, and stationary fronts or typhoon, for the horizontal site separations of 3-50km. Also, the improvement factor of the diversity effects primarily depends on the distance between the sites projected to the rain area motions. Further analyses of the two sets of the attenuation measurements at those three locations reveal that this improvement factor can be reduced down to about 60% of the ITU-R predictions, concerned with fixed two sites, by choosing a pair of the sites aligned nearest to the rain area motion at each rainfall event, yielding about 50% reduction of unavailable time percentages. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Satellite communications / Rain attenuation / Ku-band / Site diversity / Rain area / Passage velocity |
| Paper # | A・P2008-42 |
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| Conference Information | |
| Committee | AP |
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| Conference Date | 2008/7/16(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Antennas and Propagation (A・P) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Improvement Factor of Ku-Band Satellite Diversity Effects Related to Rain Area Motion |
| Sub Title (in English) | |
| Keyword(1) | Satellite communications |
| Keyword(2) | Rain attenuation |
| Keyword(3) | Ku-band |
| Keyword(4) | Site diversity |
| Keyword(5) | Rain area |
| Keyword(6) | Passage velocity |
| 1st Author's Name | Yasuyuki MAEKAWA |
| 1st Author's Affiliation | Osaka Electro-Communication University() |
| 2nd Author's Name | Koichi SAWAI |
| 2nd Author's Affiliation | Osaka Electro-Communication University |
| 3rd Author's Name | Yoshiaki SHIBAGAKI |
| 3rd Author's Affiliation | Osaka Electro-Communication University |
| 4th Author's Name | Tomoyuki TAKAMI |
| 4th Author's Affiliation | Osaka Electro-Communication University |
| 5th Author's Name | Takeshi HATSUDA |
| 5th Author's Affiliation | Hokkaido Institute of Technology |
| Date | 2008/7/16 |
| Paper # | A・P2008-42 |
| Volume (vol) | vol.108 |
| Number (no) | 148 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |