The invention discloses a steering vector and
covariance matrix joint iteration robust beam forming method, and solves the problem of the expected
signal steering vector and interference-plus-
noise covariance matrix estimation in the adaptive beam forming technology. The implementation process is that the sample
covariance matrix is estimated by using the
radar echo data acquired by the array; theexpected
signal steering vector and interference-plus-
noise covariance matrix is initialized; the convex optimization equation is established to estimate the expected
signal steering vector error; the steering vector and the
covariance matrix are updated, and alternating iteration is performed until the
optimal estimation of the steering vector and the
covariance matrix is obtained; and the
weight value is calculated and robust beam forming is realized. The expected signal steering vector constraint capacity is enhanced when the
direction of arrival and array calibration errors coexist, the expected signal
estimation interference-plus-
noise covariance matrix is accurately eliminated from the sample covariance matrix and the 'self-
elimination ' phenomenon of the expected signal can be avoided and thus the method can be used for realizing adaptive beam forming under the condition of existence of the
direction of arrival and array calibration errors.