Arrangement for producing a synchronizing pulse

Details Arrangement for producing a synchronizing pulse Arrangement for producing a synchronizing pulse

1991-10-15

1993-07-13

Kuntz, Curtis

Pulse or digital communications

Spread spectrum

Direct sequence

375116, 3701054, H04L 700

Patent

active

052280659

ABSTRACT:
A synchronizing pulse is produced upon detection of a frame codeword or frame-structured binary signal consisting of a first word repeated a plurality of times and at least one second word. A demultiplexer divides the incoming signal into n words which are advanced in parallel through n shift registers of a first memory matrix, followed by the next n words, and so on. A decoder determines whether the first word is stored in each register, and increments a respective one of n counters when the word is found. An addressing logic transforms the output into a binary number which controls a multiplexer which, in turn controls arrangement of bits in a second memory matrix. A synchronizing pulse is produced when the second memory matrix contains predetermined bits of the first and second word.

REFERENCES:
patent: 4298987 (1981-11-01), Stattel et al.
patent: 4500992 (1985-02-01), Floderer
patent: 4542503 (1985-09-01), Floderer et al.
patent: 4847877 (1989-07-01), Besseyre
patent: 4984238 (1991-01-01), Watanabe et al.
patent: 5058141 (1991-10-01), Kem et al.

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