Measured results of quasi-zenith satellite visibility and its time delayed diversity (TDD) system characteristics

Author

Hatsuda, Takeshi ; Hashimoto, Kazuya ; Masuda, Junko ; Murakami, Jun

Author_Institution

Hokkaido Inst. of Technol., Sapporo, Japan

Volume

2

fYear

2004

fDate

20-25 June 2004

Firstpage

1652

Abstract

The paper deals with the time delayed diversity (TDD) system characteristics for a quasi-zenith satellite system measured using GPS (Global Positioning System) satellites. To design a digital mobile broadcast satellite system with the TDD system, it must estimate the characteristics of attenuation by urban buildings, electrical light poles, trees, etc. Signal data from southern orbital arc GPS satellites with elevation angles from 40° to 80° are used for propagation characteristics measurements, rather than from actual geostationary satellite orbit (GSO) satellites. To overcome urban signal attenuation, the TDD system is applied for GSO satellites and quasi-zenith satellite systems and TDD characteristics are examined by processing measured GPS data.

Keywords

Global Positioning System; digital radio; direct broadcasting by satellite; diversity reception; electromagnetic wave absorption; electromagnetic wave scattering; mobile satellite communication; parameter estimation; radiowave propagation; Global Positioning System satellites; attenuation characteristics estimation; digital broadcast system; digital mobile broadcast satellite system; electrical light poles; geostationary satellite orbit satellites; mobile satellite system; quasi-zenith satellite visibility; southern orbital arc GPS satellites; time delayed diversity system characteristics; trees; urban buildings; Buildings; Delay effects; Delay systems; Extraterrestrial measurements; Global Positioning System; Optical attenuators; Optical propagation; Position measurement; Satellite broadcasting; Time measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 2004. IEEE

Print_ISBN

0-7803-8302-8

Type

conf

DOI

10.1109/APS.2004.1330511

Filename

1330511