Microwave path-loss modeling in urban line-of-sight environments

Author

Masui, Hironari ; Kobayashi, Takehiko ; Akaike, Masami

Author_Institution

Central Res. Lab., Hitachi Ltd., Tokyo, Japan

Volume

20

Issue

6

fYear

2002

fDate

8/1/2002 12:00:00 AM

Firstpage

1151

Lastpage

1155

Abstract

To model the path-loss characteristics in microwave urban line-of-sight (LOS) propagation, we performed measurements in metropolitan Tokyo at frequencies of 3.35, 8.45, and 15.75 GHz. The actual breakpoint distance was shorter than the theoretical one because of the influence of vehicles, pedestrians, and other objects on the road. This effect has been referred to as effective road height. We found that the breakpoint disappeared when the mobile-antenna height approached the effective road height. Based on these breakpoint characteristics, we propose new upper- and lower-bound formulas for LOS path loss in urban microcellular environments. They will be useful for the system and cell design of fourth-generation multimedia mobile communication systems using microwave bands.

Keywords

electromagnetic wave absorption; losses; microcellular radio; microwave propagation; multimedia communication; 15.75 GHz; 3.35 GHz; 8.45 GHz; LOS path loss; LOS propagation; SHF; Tokyo; breakpoint distance; effective road height; fourth-generation multimedia systems; lower-bound formula; microwave path-loss modeling; microwave radio propagation; mobile-antenna height; multimedia mobile communication; pedestrians; upper-bound formula; urban line-of-sight environments; urban microcellular environments; vehicles; Antenna measurements; Area measurement; Dipole antennas; Frequency measurement; Microwave bands; Microwave measurements; Mobile communication; Performance evaluation; Receiving antennas; Road vehicles;

fLanguage

English

Journal_Title

Selected Areas in Communications, IEEE Journal on

Publisher

ieee

ISSN

0733-8716

Type

jour

DOI

10.1109/JSAC.2002.801215

Filename

1021907