Accession Number : AD0886428

Title :   H. F. Propagation Confidence Levels and Path Independence,

Corporate Author : NAVAL AVIONICS FACILITY INDIANAPOLIS IN

Personal Author(s) : Clapp, Gary D.

Report Date : JUN 1967

Pagination or Media Count : 120

Abstract : This paper presents the results of a study concerning the confidence limits applicable to the HF (high frequency) propagation prediction techniques presently available for predicting the performance of communications systems operating in the sky-wave mode in the 3-30 megacycle frequency band. The paper also discusses the independence of HF paths in terms of the diversity techniques required to obtain reliable HF communications systems. An example of a communications link designed by the use of HF prediction and diversity techniques is presented. (Author)

Descriptors :   *CONFIDENCE LIMITS), (*RADIO TRANSMISSION, HIGH FREQUENCY), (*RADIO WAVES, PROPAGATION), (*COMMUNICATION AND RADIO SYSTEMS, MATHEMATICAL PREDICTION, DIVERSITY RECEPTION, MULTIPATH TRANSMISSION, RADIO INTERFERENCE, ATTENUATION, ELECTRON DENSITY, IONOSPHERE, DATA TRANSMISSION SYSTEMS, NETWORKS, WEATHER COMMUNICATIONS.

Subject Categories : Radiofrequency Wave Propagation
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE