Power difference of arrival geolocation
AssigneeSoftronics, Ltd.
InventorRobert Sternowski
Life of this patent
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Abstract
A system suitable for determining a location of an emitter emitting a signal of interest from an unknown location has a vehicle with a location position determining apparatus to receive a location datum, so the location of the vehicle can be determined when the signal of interest is received. An antenna connected to a receiver is positioned on the vehicle to detect and receive the signal of interest at a plurality of locations. A processor having a program executing therein determines the power level of the signal of interest at each measurement location and determines the location of the emitter from the change in power level of the signal of interest between measurement locations.
Claims43
A system for determining a location of an emitter emitting a signal of interest, the system comprising:
- a vehicle, including a position determining device to generate a location datum for the vehicle at each of a plurality of measurement points, an antenna to detect the signal of interest, and a receiver in communication with the antenna to receive the signal of interest;
- a processor in communication with the position determining device and the receiver;
- and
- a program executing on the processor to determine the power level of the signal of interest at all of the plurality of measurement points and to determine a solution for a probable location of the emitter from the change in power level of the signal of interest between every pair of measurement points, and determine the probable location of the emitter according to a location point for the probable location of the emitter having a greatest number of solutions.
A method for determining a location of an emitter emitting a signal of interest, the method comprising:
- receiving a signal of interest at a plurality of measurement points;
- determining a power level for the signal of interest at each measurement point;
- assuming a substantially constant path loss exponent for the signal of interest;
- and
- calculating a probable location of the emitter by equating a ratio of the distances between each measurement point and the emitter with a ratio of a change in power level of the signal of interest between measurement points for every pair of measurement points, and determining the probable location of the emitter according to a location point for the probable location of the emitter having a greatest number of solutions.
A system for determining a location of an emitter emitting a signal of interest, the system comprising:
- an antenna to detect the signal of interest;
- a receiver in communication with the antenna to receive the signal of interest;
- a processor in communication with the receiver;
- and
- a program executing on the processor to determine the power level of the signal of interest at a plurality of measurement points and to determine a solution for a probable location of the emitter from the change in power level of the signal of interest between every pair of measurement points, and determine the probable location of the emitter according to a location point for the probable location of the emitter having a greatest number of solutions.
Dependencies are inferred from the claim text.