US Patent 7280627 Constrained data-adaptive signal rejector

A constrained data-adaptive signal rejector suppresses signals received through the side lobes of a sensor array while preserving signals received through the main lobes. A main beam is formed in a typical signal processing architecture. A subset of the original independent sensor signals are paired into auxiliary channels using a weighting scheme that results in a beam pattern having a null in the direction of the beam mainlobe. The auxiliary channels are then used in a traditional multiple sidelobe cancellation architecture to reject unwanted signals.