Digital compressive receiver

Details Digital compressive receiver Digital compressive receiver

1979-12-07

1981-05-26

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

455145, 375115, 364485, 324 77B, 324 77CS, H03H 1500, H03K 384

Patent

active

042702097

ABSTRACT:
A compressive receiver for developing a series of time-based identifying pulses corresponding to discrete received signals having various frequencies within a predetermined band of surveillance. A multiple local oscillator function is included, effectively dividing the predetermined band of interest into small frequency increments, each of these local oscillator signals being coded by a pseudo-random coded sequence (bi-phase code) of maximal length. Each frequency increment thus developed is coded by this sequence delayed by one bit duration as compared to that applied to the local oscillator frequency immediately preceding it. A mixer receiving input signals in the band of interest, and also the multiple local oscillator signals thus generated and coded, has its output processed by a passive correlator which provides pulses at times determined by the frequencies extant in the input signal.

REFERENCES:
patent: 2882395 (1959-04-01), White
patent: 2994766 (1961-08-01), McCoy
patent: 3158864 (1964-11-01), Lehan
patent: 3244808 (1966-04-01), Roberts
patent: 3337804 (1967-08-01), Palatinus
patent: 3718813 (1973-02-01), Williams, Jr.
patent: 3729738 (1973-04-01), Cross
patent: 4031462 (1977-06-01), Bouvier
patent: 4038612 (1977-07-01), Borofka

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