Microwave path-loss characteristics in urban LOS and NLOS environments

Author

Masui, Hironari ; Ishii, Masanori ; Sakawa, Kozo ; Shimizu, Hiroyuki ; Kobayashi, Takehiko ; Akaike, Masami

Author_Institution

YRP Mobile Telecommun. Key Technol. Res. Labs. Co., Ltd, Kanagawa, Japan

Volume

1

fYear

2001

fDate

2001

Firstpage

395

Abstract

To model the path-loss characteristics of microwave propagation in urban environments, we performed measurements at frequencies of 3.35, 8.45, and 15.75 GHz in metropolitan Tokyo. The actual breakpoint (BP) distance was shorter than the theoretical one because of the influence of vehicles, pedestrians, and other objects on the road. This effect can be characterized in terms-of the effective road height. We also found that the BP disappeared when the mobile-antenna height approached the effective road height. In non-line-of-sight (NLOS) areas, the corner losses and attenuation coefficients were greater than those of the UHF band. The attenuation coefficients increased with LOS distance between the base station and the corner into NLOS area

Keywords

electromagnetic wave absorption; land mobile radio; loss measurement; microwave antennas; microwave links; microwave propagation; mobile antennas; 15.75 GHz; 3.35 GHz; 8.45 GHz; SHF; attenuation coefficients; breakpoint distance; effective road height; line-of-sight areas; metropolitan Tokyo; microwave path-loss characteristics; microwave propagation; mobile-antenna height; nonline-of-sight areas; pedestrians; urban LOS environments; urban NLOS environments; vehicles; Antenna measurements; Area measurement; Attenuation; Dipole antennas; Frequency measurement; Microwave bands; Microwave measurements; Microwave propagation; Performance evaluation; Road vehicles;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd

Conference_Location

Rhodes

ISSN

1090-3038

Print_ISBN

0-7803-6728-6

Type

conf

DOI

10.1109/VETECS.2001.944872

Filename

944872