Detection of angular modulated electromagnetic signals

Details Detection of angular modulated electromagnetic signals Detection of angular modulated electromagnetic signals

1982-11-30

1984-12-25

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

375115, H04K 104

Patent

active

044908296

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.

REFERENCES:
patent: 3112452 (1963-11-01), Kirkpatrick
patent: 3412405 (1968-11-01), Crotty et al.
patent: 4119926 (1978-10-01), Frosch et al.
patent: 4221005 (1980-09-01), La Flame
patent: 4285060 (1981-08-01), Cobb et al.
patent: 4308539 (1981-12-01), Birch
patent: 4392231 (1983-07-01), Henry

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