Signal correlation system

Details Signal correlation system Signal correlation system

1961-12-15

1976-05-11

Farley, Richard A.

Communications: electrical

Selective

Monitoring in addition to control

235181, 343100CL, G01S 966

Patent

active

039567281

ABSTRACT:
1. A pulse correlation readout system for a track of light modifying marks formed in a recording medium comprising a light source positioned to direct light onto the recording medium, a mask having a coded series of light modifying marks formed therein representing the signal with which correlation is sought, optical means for optically imaging the light emanating from said recording medium onto said mask, said optical means including image magnifying means, and means for varying the magnification of said image magnifying means whereby the size of the light image of the light modifying marks formed in the recording medium may be varied with respect to the size of the light modifying marks formed in the mask to thereby accomplish a Doppler scan of the signals being correlated, and electro-optical means positioned on the side of said mask opposite from the recording medium for converting light images that pass through said mask into an output electric signal representative of correlation between the mask and the track of light modifying marks being examined.

REFERENCES:
patent: 2243730 (1941-05-01), Ellis
patent: 2451465 (1948-10-01), Barney
patent: 2712415 (1955-07-01), Piety
patent: 2839149 (1958-06-01), Piety

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