Multipath measurements over obstructed radio transmission paths

Author

Ahmed, M. Jantil ; Garrison, G. Jack ; Gosse, W.

Author_Institution

MPR Teltech, Burnaby, BC, Canada

fYear

1993

fDate

14-17 Sep 1993

Firstpage

504

Abstract

To provide PSTN to isolated subscribers BC TEL employs Exchange Area Radio telephone Service (EARS) in the 409 MHz/420 MHz UHF band. Usually LOS communication is not possible, and repeaters are used. To determine if diversity techniques could be used to improve performance and eliminate the use of repeaters, a measurement program was undertaken. The two-channel measurement system to detect and only record propagation fades in mountainous area over an obstructed LOS path is described. The fading results are presented, and the mechanisms for fading are explained. The PDF and CDF of the measured signals are compared with Rayleigh distributions, and the performance improvement that can be realized is given. Finally, a suitable diversity technique is identified

Keywords

diversity reception; fading; measurement systems; mobile radio systems; probability; radio stations; radiotelephony; radiowave propagation; telecommunication channels; 409 MHz; 420 MHz; BC TEL; CDF; EARS; Exchange Area Radio telephone Service; LOS communication; PDF; PSTN; Rayleigh distributions; UHF band; diversity technique; fading; measured signals; mobile radio; mountainous area; multipath measurements; obstructed LOS path; obstructed radio transmission paths; performance improvement; propagation fades; repeaters; two-channel measurement system; Circuits; Ear; Fading; Geometry; Radio link; Rayleigh channels; Repeaters; Scattering; Telephony; UHF measurements;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering, 1993. Canadian Conference on

Conference_Location

Vancouver, BC

Print_ISBN

0-7803-2416-1

Type

conf

DOI

10.1109/CCECE.1993.332187

Filename

332187