Patent ID: 7877100
Filing Date: 2011-01-25
Classification: G01S,H04W

Abstract:
1. A method for determining a position of a mobile station using at least one cellular base station emitting a pilot signal, the method comprising: taking first data measurements for resolvable signal paths for a pilot signal from a first base station, the first data measurements including a first earliest time of arrival estimate for the resolvable signal paths and a first time of measurement; taking second data measurements for resolvable signal paths of the pilot signal, the second data measurements substantially statistically independent of the first data measurements, and the second data measurements including a second earliest time of arrival estimate and a second time of measurement; determining representative data measurements for the first base station based on the first data measurements and the second data measurements, including decreasing weightings of the first and second earliest time of arrival estimates dependent upon the first and second times of measurement; and determining the position of the mobile station based in part on the representative data measurement.