Experimental Investigation of Some Effects of Multipath Propagation on a Line-of-Sight Path at 14 GHz

Author

Stephansen, E.T. ; Mogensen, G.E.

Author_Institution

Danish Post and Telegraphs, Radio Engineering Service, Copenhagen, Denmark

Volume

27

Issue

3

fYear

1979

fDate

3/1/1979 12:00:00 AM

Firstpage

643

Lastpage

647

Abstract

A microwave line-of-sight propagation experiment is carried out in Denmark at frequencies around 14 GHz. Results from long term measurements of multipath propagation are presented. The multipath fade durations are shown to be log-normally distributed. The level dependence of the probability of fading, $P$ , the average duration of fades, $\\bar{t}$ , and the number of fades, N0, is investigated. Results show that $P \\propto L^{2}$ , $\\bar{t} \\propto L^{2/3}$ and $N_{0} \\propto L^{4/3}$ . This differs from previously published results, where proportionalities of L², $L$ and $L$ , respectively, have been proposed. Statistical results on enhancements above free space level are also presented. The results presented are believed to enable an improved description of the effects of multipath propagation.

Keywords

Microwave radio propagation meteorological factors; Microwave radio propagation terrain factors; Computer vision; Estimation theory; Integral equations; Jacobian matrices; Milling machines; Power engineering computing; Systems engineering and theory; Telecommunications; Upper bound; Writing;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOM.1979.1094434

Filename

1094434