Patent ID: 7519136

Claim:
A wireless positioning method, comprising: estimating multipath delay components from each of a plurality of received signals; selecting appropriate delay estimates from the multipath delay components to conform to a predeterminded criterion; determining whether a mobile station and one or more involved base stations are in a particular geometry that can be reduced in a lower dimension space, the determining step including determining whether there are enough base stations for current estimation, and estimating an optimum parameter for the lower dimension space if there are not enough base stations, while leaving the parameter in a rest of the dimensions to be randomly selected in a feasible region other than an infeasible region or direction in which the mobile station is unlikely to be located; estimating the position of the mobile station in the lower dimension space if the mobile station and the one or more involved base stations are in the particular geometry; and estimating a location of the mobile station based on the selected delay estimates and a non-line-of-sight (NLOS) delay function defining prior information of NLOS delays.