Accession Number : ADP006171

Title :   Forward Scatter Propagation Path Loss Testing Using Surrogate Terrain in the 100 to 1500 MHz Region,

Corporate Author : MITRE CORP EATONTOWN NJ

Personal Author(s) : Taylor, Louis L.

Report Date : SEP 1989

Pagination or Media Count : 12

Abstract : Numerous path loss calculation models have been developed for links employing forward scatter propagation. Variances in propagation loss prediction between these models and the loss experienced when a link is actually established arise because of the manner in which the models represent the large variety of absorbers and reflectors present in the actual terrain. A method to enrich a model with actual measurements that produces a more accurate method of predicting propagation loss is described. The method is based upon selecting a surrogate section of terrain for the actual terrain over which a propagation loss determination is desired, then measuring the forward scatter loss variation through this surrogate terrain. The loss value is then used as a factor in the simplified mathematical model used for the desired prediction. Examples are given of the use of this technique to assist in the design and implementation of a wide area VHF/UHF radio network serving a large fleet of mobile units.

Descriptors :   *RADIO TRANSMISSION, *FORWARD SCATTERING, *TRANSMISSION LOSS, RADIO LINKS, TERRAIN, PATHS, MATHEMATICAL MODELS.

Subject Categories : Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE