Patent ID: 6329947
Filing Date: 2001-12-11
Classification: G01S

Abstract:
A method for calculating a bearing of a signal source using a directional antenna having a plurality of receiving elements, comprising the steps of:selecting a correction model from a plurality of correction models;receiving a plurality of incoming signals with the receiving elements;processing the incoming signals to produce a plurality of electrical connection signals, wherein each of the electrical connection signals corresponds to a different quadrant of a polar coordinate system and each of the electrical connection signals has an amplitude;selecting the electrical connection signal with the strongest amplitude;selecting the electrical connection signal with the second strongest amplitude;identifying a first quadrant that contains the electrical connection signal with the strongest amplitude;identifying a second quadrant that contains the electrical connection signal with the second strongest amplitude;calculating an amplitude difference between the electrical connection signal with the strongest amplitude and the electrical connection signal with the second strongest amplitude;applying a correction to the amplitude difference in order to obtain the bearing of the signal source, wherein the correction is determined by the correction model, the first quadrant, and the second quadrant.