Accession Number : ADD011563

Title :   Detection of Angular Modulated Electromagnetic Signals.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Van Etten,P

Report Date : 25 Dec 1984

Pagination or Media Count : 5

Abstract : A signal processing circuit which operates on a spread spectrum received signal to compress it into a waveform of sufficient amplitude to allow detection by conventional means. The received signal is filtered and split onto two paths, each path being mixed with an upper or lower single sideband created by an oscillator and modulator combination. The output of each mixer is filtered and mixed together in a third mixer, the resultant output of which is fed through a narrow bandpass filter to a conventional signal detector. (Author)

Descriptors :   *Patents, *Single sideband communications, *Signal processing, *Radar equipment, *Modulators, Detectors, Signal to noise ratio, Modulation, Local oscillators, Mixers(Electronics), Spread spectrum, Signals, Bandpass filters, Narrowband, Electromagnetic radiation, Circuits, Paths, Angles

Subject Categories : Cybernetics
      Active & Passive Radar Detection & Equipment
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE