Paper Abstract and Keywords |
Presentation |
2008-07-23 13:00
Improvement Factor of Ku-band Satellite Diversity Effects Related to Rain Area Motion Yasuyuki Maekawa, Koichi Sawai, Yoshiaki Shibagaki, Tomoyuki Takami (Osaka Electro-Commun. Univ.), Takeshi Hatsuda (Hokkaido Inst. Tech.) AP2008-42 |
Abstract |
(in Japanese) |
(See Japanese page) |
(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 3-50 km. 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) |
(in English) |
Satellite communications / Rain attenuation / Ku-band, / Site diversity / Rain area / Passage velocity / / |
Reference Info. |
IEICE Tech. Rep., vol. 108, no. 148, AP2008-42, pp. 35-40, July 2008. |
Paper # |
AP2008-42 |
Date of Issue |
2008-07-16 (AP) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and reproduction |
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AP2008-42 |
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