Highly Adaptable Uncertainity Estimation Methodology for Sensor Fusion Systems

Not Available Conventional Mainbeam cancellation is a more difficult technique to implement than sidelobe cancellation, due to two principal reasons. First, it requires at least one high-gain auxiliary channel (each such channel entails an independent, full gain, beamformer,) and second, the post-cancellation main-beam residues are normally too distorted to allow for a meaningful angle measurement capability. The mainbeam cancellation approach that we propose below obviates these difficulties. It utilizes an innovative beamforming technique that provides several major advantages. First, it enables the radar to steer the pattern difference nulls toward the jammer within the same dwell at which jamming is first detected, and to implement the steering more accurately than is possible via the antenna phase shifters. Second, it makes it possible to adaptively cancel jamming residues in the difference patterns using multiple available high gain channels, without incurring undue pattern distortions. Third, it enables target detection in the jamming sanitized difference channels. Fourth, it enables a measure of angle estimation based on difference channel ratios sanitized from jamming. And fifth, it accomplishes all of the above using only minor modifications to the conventional monopulse beamforming architecture, and increasing the number of receive channels by a modest amount.