Method and apparatus for synchronously detecting a differentiall

Details Method and apparatus for synchronously detecting a differentiall Method and apparatus for synchronously detecting a differentiall

1977-01-17

1978-05-09

Griffin, Robert L.

Telegraphy

Systems

Printing

178 88, H04B 116

Patent

active

040889572

ABSTRACT:
A differentially encoded carrier signal is synchronously detected by generating an output signal indicative of the carrier signal characteristic in each transmitted bit interval during the interval, storing it so that in the next bit interval it can be compared against the output signal for the immediately preceding transmitted bit interval to establish the characteristic differential to demodulate its information and forcing the output signal to zero in a subsequent bit interval after first using it as a reference for comparison with the output signal for the immediately succeeding transmitted bit interval to demodulate its information.

REFERENCES:
patent: 3139615 (1964-06-01), Aaron
patent: 3368038 (1968-02-01), Carter
patent: 3622885 (1971-11-01), Kruszynski
patent: 3815034 (1974-06-01), Kato
patent: 3830971 (1974-08-01), Van de Polder
patent: 3937871 (1976-02-01), Robinson
patent: 3940555 (1976-02-01), Amano
patent: 4007331 (1977-02-01), Flanagan

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