Receiver filtering out both systematic pulse noise and random no

Details Receiver filtering out both systematic pulse noise and random no Receiver filtering out both systematic pulse noise and random no

1974-12-05

1976-03-16

Mayer, Albert J.

325425, 325477, H04B 116

Patent

active

039449327

ABSTRACT:
A continuous wave (c.w.) receiver is described comprising an amplitude limiting section, a commutating filter section, peak detecting means, and a threshold device. The receiver detects the presence or absence of an incoming signal over a very narrow, adjustable bandwidth. The limiting section clips the signal and noise at a predetermined amplitude and, in combination with the commutating filter, reduces the effect of noise, particularly impulse noise. The peak detector selects the highest output from the commutating filter and, in combination with the commutating filter, performs a pseudo-synchronization function when the received signal and an internal signal are not synchronized exactly.

REFERENCES:
patent: 3140486 (1964-07-01), Gillmer
patent: 3292088 (1966-12-01), Martin et al.
patent: 3462691 (1969-08-01), McDonald
patent: 3671867 (1972-06-01), Schwarz
patent: 3714581 (1973-01-01), Sage
patent: 3781688 (1973-12-01), Rannells

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