Patent ID: 6728545
Filing Date: 2004-04-27
Classification: G01S,H04W

Abstract:
A method for determining the location of a terminal in a wireless communications network, comprising:receiving respective signals from each of at least four reference terminals at said terminal, each said respective signal including information representing a location of its respective said reference terminal; estimating a respective distance from said terminal to each of said reference terminals based on said respective signals received at said terminal; calculating a respective simulated pattern about each of said respective reference terminals based on said respective estimated distance from said terminal to each said respective reference terminal and said respective locations of said respective reference terminals; estimating a location at which each of said simulated patterns have the smallest error in their respective estimated distance, and identifying said estimated location as representing the location of said terminal; and performing error minimizing calculations based on Gauss's postulate to minimize sum of square errors in estimating said location.