Sweeping noise blanker

Details Sweeping noise blanker Sweeping noise blanker

1978-05-12

1980-01-01

Griffin, Robert L.

325435, 325479, 328165, H04B 110, H04B 1500

Patent

active

041818920

ABSTRACT:
A noise rejection circuit for a communications receiver in which the input o the receiver is continually sampled by a sweeping heterodyne oscillator to develop a difference frequency noise signal which represents the input noise over a wide frequency band. The receiver input is also processed by a conventional heterodyne oscillator to develop an output at an intermediate frequency that is comprised of the desired signal plus the noise component. Further processing of both the swept heterodyne oscillator and the normal heterodyne oscillator outputs in a differential combiner serves to remove the noise from the desired data signal.

REFERENCES:
patent: 3387222 (1968-06-01), Hellwarth et al.
patent: 3611145 (1971-10-01), O'Connor
patent: 3651406 (1972-03-01), Mohr et al.
patent: 3868577 (1975-02-01), Watt

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