Patent · US Active

Device for and method of geolocation

US7893875B1 · kind B1 · utility

163Cited by

21References

19Claims

0Family size

Assignee

The United States of America, as represented by the Director, National Security Agency · US

Inventor

David C. Smith · North Palm Beach, US

Key dates

Filing date	Mar 11, 2009
Grant date	Feb 22, 2011
Priority date	—
Expiry date	Sep 12, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG01S11/10
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A device and method of geolocating a transmitter. First and second receivers, in motion, receive a signal from the transmitter. Digitizers in the receivers digitize the signal. Converters in the receivers for converting the digitized signals to complex-valued signals. Transmitters on the receivers transmit their digitized signals, locations, and velocities at the time the signal was received to a processor. A central processing unit on the processor determines a difference in radial velocities of the receivers relative to the transmitter. The difference in radial velocities and delay time between the signals received at the receivers are used to geolocate the transmitter.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.