Patent ID: 7791487
Filing Date: 2010-09-07
Classification: G01S

Abstract:
1. A computer-implemented method for estimating a location of a radio frequency identification tag using incomplete information, the method comprising: receiving a plurality of signals from the radio frequency identification tag, wherein receiver information associated with the plurality of signals is insufficient to enable triangulation; storing a plurality of corresponding datasets, wherein ones of the plurality of corresponding data sets correspond to ones of signals in the plurality of signals, wherein each corresponding dataset comprises a corresponding identifier for the radio frequency identification tag, a corresponding identifier of at least one corresponding receiver that received a corresponding signal, and a corresponding timestamp identifying a corresponding time at which the corresponding signal was received, so as to form a set of datasets for the radio frequency identification tag; using data in the set of datasets to calculate a time-correlated movement pattern for the radio frequency identification tag; using the time-correlated movement pattern to estimate a location of the radio frequency identification tag at a given point in time, wherein an estimated location is determined; and storing the estimated location.