Secure hyperbolic guidance using noise signals and correlation d

Details Secure hyperbolic guidance using noise signals and correlation d Secure hyperbolic guidance using noise signals and correlation d

1956-05-22

1976-02-03

Pendegrass, Verlin R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

244 77B, 343100CL, G01S 130

Patent

active

039368270

ABSTRACT:
A method for use in controlling the flight of an aircraft which includes radiating from two base stations respectively a first noise signal and a second noise signal identical to said first noise signal but at a slightly different frequency and at a controlled interval with respect thereto, receiving both of said signals at said aircraft, simultaneously deriving at said aircraft a first oscillating voltage related to the envelope of the correlation function of said signals at a first delay time therebetween and a second oscillating voltage related to said envelope of said correlation function of said signals at a second delay time therebetween, subtracting said voltages to yield a difference voltage, and utilizing said difference voltage to control the airfoils of said aircraft.

REFERENCES:
patent: 2580148 (1951-12-01), Wirkler
patent: 2698935 (1955-01-01), Sitterly

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