Multipath propagation study combining terrain diffraction and reflection

Author

Zhao, Xiongwen ; Vainikainen, Pertti

Author_Institution

Radio Lab., Helsinki Univ. of Technol., Espoo, Finland

Volume

49

Issue

8

fYear

2001

fDate

8/1/2001 12:00:00 AM

Firstpage

1204

Lastpage

1209

Abstract

A multiple knife-edge attenuation formula is derived by combining diffraction and ground reflection. As an example, the attenuation by double knife edges with ground reflection is derived in detail and the attenuation by a flat-topped obstacle with slanted sides is also calculated. The attenuated fields are proven to be the combination of eight field components, and the number of multipath reflection rays can be reduced based on the location of the main reflection point defined by path parameters. The formulas have clear physical meanings and can be used for field strength prediction in both mobile and fixed communications

Keywords

electromagnetic wave absorption; electromagnetic wave diffraction; electromagnetic wave reflection; land mobile radio; multipath channels; radiowave propagation; attenuated fields; field components; field strength prediction; fixed communications; flat-topped obstacle; ground reflection; mobile communications; multipath propagation; multipath reflection rays; multiple knife-edge attenuation formula; path parameters; radiowave propagation; slanted sides; terrain diffraction; terrain reflection; Attenuation; Diffraction; Electromagnetic propagation; Electromagnetic reflection; Fresnel reflection; Geometry; Mobile communication; Radio transmitters; Sea surface; Space technology;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.943315

Filename

943315