Fast algorithm and architecture for constrained adaptive sidelobe cancellation
Richard A. Games, Willard L. Eastman, Michael J. Sousa · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1991
This paper describes an efficient implementation of auxiliary constraints for a concurrent block least squares adaptive sidelobe canceller when a single array of sensors is used to form one or more main beams. The approach is to compute QR decomposition of the auxiliary data matrix and then send this information to main beam processors, where the constraints are applied using a blocking matrix and the individual residuals are computed. The blocking matrix can be chosen with special structure which is used to derive a new fast algorithm and architecture for constrained main beam processing that reduces the operation count from order n3 to order n2, where n is the number of auxiliary sensors.