Accession Number : ADD014424

Title :   A Real-Time Rejection Circuit to Automatically Reject Multiple Interfering Hopping Signals While Passing a Lower Level Desired Signal.

Descriptive Note : Patent Application, Filed 8 Jan 90,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Skudera, William J , Jr ; Albert, Stuart D

Report Date : 08 Jan 1990

Pagination or Media Count : 24

Abstract : A real-time rejection circuit for passing low level desired signals in the presence of one or more strong, interfering signals. A chirp-z transform system separates the various frequency components of a received signal into frequency segregated time domain signals. A power splitter separates the time domain signal into two paths. One path includes a modulator or switch that is normally biased ON for passing the time domain signal. The second path includes a diode detector that produces pulses of sufficient strength when a strong interfering component is present to override the bias and turn the modulator OFF for a sufficient period of time to attenuate the unwanted frequency components in the other path. The modulator output will primarily contain the low level desired frequency components that are passed through an inverse transform device for producing a frequency domain signal of the desired signal uncorrupted by unwanted signals. Patent applications. (RRH)

Descriptors :   *CIRCUITS, *DETECTORS, *PATENT APPLICATIONS, *REJECTION, *SPLITTING, *TIME SIGNALS, DIODES, FREQUENCY, LOW LEVEL, MODULATORS, OUTPUT, PATHS, POWER, REAL TIME, SIGNALS, TIME, TIME DOMAIN

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE