Patent ID: 6130643
Filing Date: 2000-10-10
Classification: G01S,H04K

Abstract:
An antenna nulling system for nulling a jamming signal, said antenna nulling system comprising:a multibeam antenna having a plurality of antenna elements, said multibeam antenna operable to receive a plurality of signals from said plurality of antenna elements;a correlator operable to receive at least one sample signal from one of said antenna elements and a composite signal from said plurality of antenna elements, said correlator operable to determine a cross-correlation of said sample signal and said composite signal;an antenna pattern calculator operable to calculate a difference in pattern magnitude of an adapted antenna pattern and a quiescent antenna pattern of said multibeam antenna;a sequential updater operable to sequentially calculate a new weight for each of said antenna elements based upon an existing weight of each antenna element, said cross-correlation and said difference in pattern magnitude; anda beamformer in communication with said multibeam antenna and said sequential updater, said beamformer operable to combine said new weight for each of said antenna elements with said plurality of signals received from said multibeam antenna to null said jamming signal.