Encoding and decoding device for narrow bandwidth coherent signa

Details Encoding and decoding device for narrow bandwidth coherent signa Encoding and decoding device for narrow bandwidth coherent signa

1982-06-07

1986-06-17

Thomas, James D.

Boots, shoes, and leggings

364484, G01R 2300, G04F 1004

Patent

active

045959927

ABSTRACT:
A signal to be measured is limited and supplied to the clock inputs of a series of high speed D-Flip-Flops. The D input of the Flip-Flops are simultaneously supplied with signals from a Clock by way of taps on a Delay Line. The state of the Flip-Flops accurately represent in digital form the time of occurrance of selected leading edges of the signal to be measured with a resolution of one nanosecond. Each such time of occurrance measurement is substracted from the previous measurement to determine the period of the signal to be measured. The resulting period data is stored and scaled, making it available to precisely reproduce the received signal in frequency and phase in one half cycle period steps.

REFERENCES:
patent: 3304504 (1967-02-01), Horlander
patent: 3971994 (1976-07-01), Shepherd
patent: 4137497 (1979-01-01), Lowenschuss
patent: 4420809 (1983-12-01), Pierce

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