Accession Number : AD0650373

Title :   FREQUENCY ASSIGNMENT STUDIES.

Descriptive Note : Quarterly progress rept. no. 5, 1 Nov 66-31 Jan 67,

Corporate Author : ELECTRO TECHNICAL ANALYSIS CORP TUCSON ARIZ

Personal Author(s) : Hoehn,A. J. ; McCurnin,T. W.

Report Date : MAR 1967

Pagination or Media Count : 70

Abstract : A report is made on a study to improve electromagnetic compatibility in the field army through development of frequency-assignment practices. The theoretical analysis of the radio-relay frequency assignment problem is extended. The modified exclusion matrix is used to define a product involving the matrix, the grouping of assignments at nodes, and the frequency assignment requirements. It is shown that the terms of this product can be used to define mappings and bounding rules which, if satisfied, assure an interference-free frequency assignment. A procedure is proposed which satisfies these rules. The actual procedure represents a modification of the current ABM type of scheme. A method for achieving a high degree of protection from intermodulation is included as an integral part of the assignment method. The physical and analytical basis for the method is included. The fm receiver module in the Evaluation Model is extended to cover the general case of a desired signal modulated with band-limited white noise plus multiple noise-modulated interferers whose amplitudes may approach that of the desired signal. (Author)

Descriptors :   (*RADIOFREQUENCY, SCHEDULING), (*ELECTROMAGNETIC COMPATIBILITY, COMMUNICATION AND RADIO SYSTEMS), (*COMMUNICATION AND RADIO SYSTEMS, TACTICAL WARFARE), FREQUENCY, MILITARY REQUIREMENTS, NETWORKS, RADIO RECEIVERS, MATHEMATICAL MODELS, STOCHASTIC PROCESSES

Subject Categories : Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE