Patent ID: 8463293
Filing Date: 2013-06-11
Classification: H04W

Abstract:
1. A method for estimating a location of wireless devices transmitting signals on channels in a communications system having a plurality of nodes and a plurality of Location Measurement Units (“LMU”) comprising the steps of: (a) receiving a first plurality of signals from a first channel by one or more of the plural LMUs; (b) receiving a second plurality of signal from a second channel by one or more of the plural LMUs; (c) converting the received first and second plural signals into first and second digital signals; (d) dividing the first and second digital signals into first and second sets of frequency bins, the first and second sets of bins corresponding to the respective channel; (e) correlating each of the divided signals with one or more reference signals; (f) storing correlated signals in a database for estimating a location of one or more wireless devices; (g) receiving tipping information by one or more of the LMUs wherein data used for the stored correlated signals was received prior to receipt of the tipper information; and (h) estimating a location of the wireless device as a function of the stored correlated signals.