Digital Pseudo continuous tone detector

Details Digital Pseudo continuous tone detector Digital Pseudo continuous tone detector

1980-02-14

1981-11-24

Malzahn, David H.

Boots, shoes, and leggings

G06F 1531

Patent

active

043028179

ABSTRACT:
Method and apparatus for sampling input signals of different frequencies and providing a detect signal when the input frequency has a predetermined value suitable for use as a tone decoder for continuous tone controlled squelch systems. The method utilizes digital pseudo continuous correlation tone detection, and includes sample matrix limiting to provide rapid reverse burst turnoff, as well as background detection to avoid adjacent channel reverse burst turnoff falsing.

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patent: 3602820 (1971-08-01), Kaufman
patent: 3748451 (1973-07-01), Ingwersen
patent: 3950635 (1976-04-01), Constant
patent: 3962645 (1976-06-01), Stewart
patent: 4021653 (1977-05-01), Sharp et al.
patent: 4127824 (1978-11-01), Bennett, Jr.
patent: 4164036 (1979-08-01), Wax
patent: 4185172 (1980-01-01), Melindo et al.
patent: 4216463 (1980-08-01), Backof, Jr. et al.

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