Accession Number : ADP005731

Title :   An Investigation of Terrain Related Variables for Predicting the Multipath Fade Depth Distribution on Terrestrial Microwave Links,

Corporate Author : NORWEGIAN TELECOMMUNICATIONS ADMINISTRATION RESEARCH ESTABLISHMENT KJELLER

Personal Author(s) : Tjelta, Terje ; Olsen, Roderic L. ; Martin, Louis

Report Date : NOV 1987

Pagination or Media Count : 9

Abstract : Terrain related variables are shown to be important in an asymptotic prediction equation for the worst-month multipath fade depth distribution. From a fading data base for 47 links in North Western Europe, equations are developed employing up to six variables and an additional variable geoclimatic factor. The best standard error of prediction is 2.8 dB, considerably better than that available from other prediction methods for the same region. A large number of variables are investigated, most of them closely related to the terrain. The results suggest that terrain reflections play an important role in multipath propagation.

Descriptors :   *MULTIPATH TRANSMISSION, *TERRAIN, MICROWAVE EQUIPMENT, FADING(ELECTROMAGNETIC WAVES), NATO.

Subject Categories : Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE