Patent ID: 7406116
Filing Date: 2008-07-29
Classification: H04B,H04L,H04W

Abstract:
1. A method for locating an addressable receiver of electromagnetic radiation relative to locations of a plurality of addressable sources of the electromagnetic radiation in a wireless communication network, the method comprising the steps of: establishing a plurality of radio maps having coordinates corresponding to locations in space at which a calibration signal strength from each of a set of the plurality of addressable sources is measured, each of said radio maps having stored at said coordinates thereof a probability distribution of said calibration signal strength from a corresponding one of said set of said plurality of addressable sources; measuring a received signal strength of each of said set of addressable sources at the addressable receiver; compensating said received signal strength measurement of each of said set of addressable sources for temporal variations therein; and identifying one of said coordinates of said plurality of radio maps corresponding to a location in space at which said compensated signal strength measurement of said set of addressable sources would be measured with maximum probability given said probability distribution of calibration signal strength of said set of addressable sources thereat, said identified coordinate being a discrete-space estimate of the location of the addressable receiver.