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タイトルA Proposed Change to ITU-R Recommendation 681
著者(英)Davarian, F.
著者所属(英)Hughes Space and Communications Group
発行日1996-09-01
言語eng
内容記述Recommendation 681 of the International Telecommunications Union (ITU) provides five models for the prediction of propagation effects on land mobile satellite links: empirical roadside shadowing (ERS), attenuation frequency scaling, fade duration distribution, non-fade duration distribution, and fading due to multipath. Because the above prediction models have been empirically derived using a limited amount of data, these schemes work only for restricted ranges of link parameters. With the first two models, for example, the frequency and elevation angle parameters are restricted to 0.8 to 2.7 GHz and 20 to 60 degrees, respectively. Recently measured data have enabled us to enhance the range of the first two schemes. Moreover, for convenience, they have been combined into a single scheme named the extended empirical roadside shadowing (EERS) model.
NASA分類Communications and Radar
レポートNO97N12565
権利No Copyright
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/542309


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