Method and system for identifying signal frequencies emitted at a known location using geographically distributed RF sensors
OwnerMutsuya Iiinventor
Life of this patent
Estimating the term…
Abstract
A network of three or more RF sensors acquires RF data in terms of power versus frequency data or energy versus frequency data. An expected power or energy difference between RF sensors in each pair of RF sensors is calculated based on the known location. The observed power or energy differences are then compared with the expected differences to determine whether the expected and observed differences match or nearly match for one or more particular frequencies. When the observed and expected differences match or nearly match, the particular frequency is determined to be a probable frequency for the RF signal emitted at the known location.
Claims20
A method for identifying one or more probable signal frequencies for an RF signal emitted at a known location using geographically distributed RF sensors, comprising:
- calculating an expected signal value difference between RF sensors in each pair of RF sensors based on the known location;
- acquiring RF data over a given frequency spectrum;
- and
- comparing observed signal value differences with the expected signal value differences over the given frequency spectrum.
A system for identifying one or more probable signal frequencies for an RF signal emitted at a known location, comprising:
- a central processing device;
- and
- a plurality of RF sensors each connected to the central processing device through a network connection, wherein each RF sensor is operable to acquire signal value versus frequency data for acquired RF data and transmit the signal value versus frequency data to the central processing device using the network connection, wherein the central processing device determines the one or more probable signal frequencies using the received signal value versus frequency data.
Dependencies are inferred from the claim text.