| Presentation | 2000/7/20 A・P2000-55 / SAT2000-52 / MW2000-55 ESTIMATION OF URBAN SHIELDING AND Sat.D CHARACTERISTICS FOR MOBILE BROADCAST GEOSTATIONARY SATELLITE AND ITS MEASURING RESULTS Takeshi Hatsuda, Yosinobu Yamada, Jyungo Osada, Tsuyosi Kobayasi, Tadayoshi Katoh, Yoshinao Aoki, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper deals with the urban propagation characteristics and satellite-diversity(Sat.D) characteristics of mobile broadcast geostationary satellite system by using the GPS(Global Positioning System)signals. For designing digital broadcast from geostationary satellite, it must be clarified the shadowing characteristics by urban building, electrical light poles and trees etc. Southern orbital arc GPS satellite signals with elevation angle between 40～50 degrees data are used for propagation characteristics, rather than actual geostationary satellite, e.g., the N-STAR. This new measuring method has several merits, i.e., low measuring equipment cost, easy data accumulation (i.e., satellite position, receiver position and height, received signal levels etc.). A receiving system on a vehicle measured signals fades caused by shadowing building etc. As a result, west to east urban roads are heavily attenuated. Furthermore, to overcome this attenuation, the Sat.D characteristics are processed from measured data. From processing results, more than 90% satellite visibility percentage can be achieved in urban sity by selecting two diversity satellites with separation angles more than about 45 degrees. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Urban propagation characteristics / Sat.D characteristics / GPS signals / Propagation characteristics measurements / Geostationary satellite |
| Paper # | A・P2000-55,SAT2000-52,MW2000-55 |
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| Conference Information | |
| Committee | AP |
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| Conference Date | 2000/7/20(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) | A・P2000-55 / SAT2000-52 / MW2000-55 ESTIMATION OF URBAN SHIELDING AND Sat.D CHARACTERISTICS FOR MOBILE BROADCAST GEOSTATIONARY SATELLITE AND ITS MEASURING RESULTS |
| Sub Title (in English) | |
| Keyword(1) | Urban propagation characteristics |
| Keyword(2) | Sat.D characteristics |
| Keyword(3) | GPS signals |
| Keyword(4) | Propagation characteristics measurements |
| Keyword(5) | Geostationary satellite |
| 1st Author's Name | Takeshi Hatsuda |
| 1st Author's Affiliation | Hokkaido Institute of Technology() |
| 2nd Author's Name | Yosinobu Yamada |
| 2nd Author's Affiliation | Hokkaido Institute of Technology |
| 3rd Author's Name | Jyungo Osada |
| 3rd Author's Affiliation | Hokkaido Institute of Technology |
| 4th Author's Name | Tsuyosi Kobayasi |
| 4th Author's Affiliation | Hokkaido Institute of Technology |
| 5th Author's Name | Tadayoshi Katoh |
| 5th Author's Affiliation | Mobil Broadcast Limited, Tokyo |
| 6th Author's Name | Yoshinao Aoki |
| 6th Author's Affiliation | Hokkaido University |
| Date | 2000/7/20 |
| Paper # | A・P2000-55,SAT2000-52,MW2000-55 |
| Volume (vol) | vol.100 |
| Number (no) | 218 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |