Accession Number : ADD008111

Title :   Privacy Communication Method and System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Clinch,Marvin R ; Graf,Calvin R ; Martin,Paul E ; Fenwick,Robert B

Report Date : 06 Jan 1981

Pagination or Media Count : 13

Abstract : This patent relates to a privacy communication method and system which utilizes coherent, continuously changing frequencies for keyed, pulsed, and voice communications. A synthesized swept frequency or 'chirp' signal imparts a privacy or secure communications capability to the communications signal by virtue of the random or pseudorandom nature of the transmitted signals which is programmed.

Descriptors :   *Patents, *Secure communications, *Voice communications, Frequency modulation, Sweep frequency techniques, Pulses, Random variables, Chirp filters, Specifications, Waveforms, Time dependence

Subject Categories : Voice Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE