A constrained constant modulus adaptive beamforming method based on cubature Kalman filter is proposed.Firstly,the state space model of the constrained constant modulus criterion is formulated with the pseudo-observation method.Then the cubature Kalman filter is utilized to solve the non-linear filtering problem.This algorithm avoids the approximation procedure and the high eigenvalue spread effect which exists in conventional methods,and hence it exhibits better interference and noise suppression capacity....