Pulse or digital communications – Repeaters – Testing
Patent
1988-07-06
1989-08-22
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
375106, H04L 2722
Patent
active
048603180
ABSTRACT:
The apparatus detects the presence of long or short pulse phase shift keyed (PSK) modulated signals and determines the underlying clock frequency and modulation code associated with such signal, in real time, using an instantaneous frequency measurement (IFM) receiver as its signal source, without affecting the band-width or sensitivity of this receiver. It monitors the output of the IFM correlators for transients which occur in the correlator's outputs when a PSK signal is present. Logic circuits are used to declare the PSK signal is present, determine its clock rate, a record the modulation or total number of pulses.
REFERENCES:
patent: 3999136 (1976-12-01), O'Berry et al.
patent: 4379993 (1983-04-01), Holden
patent: 4551846 (1985-11-01), Takeda et al.
patent: 4558284 (1985-12-01), Zaidenweber
Hedge, Jr. James N.
Shaw Rudy L.
Tsui James B. Y.
Franz B. E.
Safourek Benedict V.
Singer Donald J.
The United States of America as represented by the Secretary of
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