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US 4,225,966 AGranted
Power area collocation of transmitters
AssigneeThe United States of America as represented by the Secretary of the Army
InventorThomas C. Blow
Life of this patent
Estimating the term…
Abstract
A method of collocating transmitters within a power area, utilizing the pr supply ripple frequency components contained in the modulation envelope of radio transmissions. Two or more signals are first detected and then filtered to extract the ripple frequency components. The phase relation between the ripple components is then compared, a constancy of relation indicating that both signals have the same AC power source, and thus that the transmitters are located in the same power area.
Claims8
A method of collocating transmitters comprising the steps of:
- detecting at least two transmitted signals, the signals having ripple frequency components;
- and
- comparing the ripple frequency components of the signals to collocate the transmitters.
Dependencies are inferred from the claim text.