SYSTEM TO DETERMINE THE LOCATION OF A RADIO FREQUENCY SOURCE USING RADIO FREQUENCY SIGNAL STRENGTH AND RELATED METHODS

Abstract: in one general aspect, rf localization methods and systems are disclosed. an exemplary method includes providing a node having a communications device and antenna elements; capturing, via the communications device, a relative signal strength indicator (rssi) value for each antenna element to generate cardinal rssi values associated with a rf signal; and determining, using the cardinal rssi values, a position of a rf source of interest (rfsoi) relative to the node. the antenna elements are oriented in each nodal cardinal direction and conductively coupled to the communications device. the rf signal emanates from the rfsoi. capturing the rssi value for each antenna element may include causing a rf switch to successively activate the antenna elements in a predetermined order; capturing the rssi value of each antenna element when activated; and determining at least two cardinal rssi values that are greater than a predetermined amount thereby determining antenna elements of interest.

Inventor(s): JAMES TURNEY, JACLYN SCOTT, DAN SCHEFFER, SRIRAM MANIVANNAN, JOHN LETTOW, JOSIAH HENRY, KENNETH FRITSCH, MICHAEL FILIPELLI, VICTOR CONTRERAS, SAMARPITA CHOWDHURY, TRENTICE V. BOLAR

CPC Classification: G01S5/06 (Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements ( takes precedence))

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