Apparatus for reliably fetching data, on the basis of framing co

Details Apparatus for reliably fetching data, on the basis of framing co Apparatus for reliably fetching data, on the basis of framing co

1987-03-26

1988-12-27

Pellinen, A. D.

Pulse or digital communications

Spread spectrum

Direct sequence

375116, 371 47, 370100, 358148, H04L 702

Patent

active

047946261

ABSTRACT:
A transmission signal includes a framing code and a data signal following the framing code. The framing code has a predetermined pattern which can be identified even if a bit error occurs therein. A signal fetcher fetches the transmission signal upon detecting the framing code which is included therein, on the basis of a reference signal. A framing code detector compares an output from the fetcher with pattern data corresponding to a predetermined pattern of the framing code. If the output has a bit error with respect to the pattern data, the detector generates a first framing code-detection output, for supply to the fetcher, as a signal for providing the timing. However, if the output coincides with the pattern data, the detector generates a second framing code-detection output. A reference signal generator generates the reference signal for the fetcher, in correspondence with the second framing code-detection output.

REFERENCES:
patent: 3978285 (1976-08-01), Tan et al.
patent: 4002845 (1977-01-01), Kaul et al.
patent: 4316285 (1982-02-01), Bosilin et al.
patent: 4602367 (1986-07-01), McDermott, III
patent: 4638497 (1987-01-01), Koratsu et al.
patent: 4641327 (1987-02-01), Wei
patent: 4712131 (1987-12-01), Tanase

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