Receiver for jam-resistant TV system

Details Receiver for jam-resistant TV system Receiver for jam-resistant TV system

1979-05-03

1983-03-29

Buczinski, S. C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358117, 358148, H04N 716

Patent

active

043785700

ABSTRACT:
A jam-resistant receiver for a TV signal in which each vertical sync pulse is replaced by several increasingly-delayed symbols from a pseudo-random number generator. A correlator produces a correlation pulse on receipt of a predetermined one of the symbols. The pulse is used to generate reconstituted vertical sync pulses having the correct phase. If the correlation pulse falls below a threshold value due to interference, the receiver automatically shifts to the use of a different symbol for synchronization.

REFERENCES:
patent: 3780213 (1973-12-01), Harna
patent: 3916406 (1975-10-01), Miller et al.
patent: 4075660 (1978-02-01), Horowitz
patent: 4091423 (1978-05-01), Branscome

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