Patent ID: 6765533
Filing Date: 2004-07-20
Classification: G01S

Abstract:
A method of locating a signal emitting source comprising the steps of:a) selecting N measurements of power from the source from measurements made by sensors positioned at difference locations, where N is an even number and at least four; and characterised by b) constructing Nâˆ’1 direct power ratios each derived from the N power measurements, each power ratio having a numerator which is the product of the values of a subset comprising N/2 of the N power measurements and a denominator which is the product of the values of the remaining N/2 of the N power measurements falling outside the subset, each direct power ratio being derived from a difference combination of numerator and denominator power measurements; and c) calculating the source location from the (Nâˆ’1) direct power ratios.