Patent ID: 7660591
Filing Date: 2010-02-09
Classification: G01S,H04B

Abstract:
1. A method of determining a location of a transmitter comprising: taking a Received Signal Strength (RSSI) measurement at a plurality of locations; subtracting a known transmit power from each of said RSSI measurements to produce a Propagation Loss Vector (PLV) for each location of said plurality of locations; developing a model from said PLVs, said model including a plurality of grid points; producing a candidate Transmit Power Vector (TPV) by subtracting the PLV for a candidate location from each of said RSSI measurements; matching each of said RSSI measurements against each TPV of said model; and determining if all grid points have been evaluated in said matching and when all the grid points have not been evaluated then repeating said matching for another grid point, and when all grid points have been evaluated then selecting a grid point having a best match as a location of said transmitter.