Patent ID: 8340683

Claim:
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 signals 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; (h) retrieving stored correlated signals from the database matching data in the tipping information; (i) non-coherently adding the retrieved signals; (j) determining time of arrival (“TOA”) information as a function of peak or peak quality of the added signals; and (k) estimating a location of a wireless device as a function of the determined TOA information.