Two causes of performance degradation in adaptive beamforming are perturbation error and
sample covariance error. These causes were discussed by Feldman and Griffihs (see IEEE …

Severe signal cancellation often occurs in conventional adaptive beamforming if coherent
interferers are present. The paper proposes adding quadratic constraints to a linearly …

It is well known that calibration errors can seriously degrade performance in adaptive arrays,
particularly when the input signal-to-noise ratio is large. The effect is caused by the …

The application of orthogonal perturbation sequences to adaptive beamforming is
considered. The perturbation approach is relevant when all the array element signals in an …

A robust algorithm is introduced for adaptive beamformer in the presence of pointing errors.
It preserves the desired signal and keeps nice interference nulling simultaneously. This …

A new approach to robust adaptive beamforming for wideband array signals is proposed.
General steering vector errors, such as direction-of-arrival mismatch and array positional …

From the viewpoint of achieving rapid convergence, application of a Kalman filter to an
adaptive array is considered. Compared with the Frost's (1972) constrained least-mean …

Conventional linearly constrained adaptive beamformers often suffer from severe signal
cancellation in the presence of interferers correlated with the signal. We propose a partially …

A high performance robust beamforming scheme is proposed to combat model mismatch.
Our method lies in the novel construction of interference‐plus‐noise (IPN) covariance matrix …

A robust adaptive beamforming technique based on a reconstructed covariance matrix and
array steering vector (ASV) estimation using low‐complexity algorithms is proposed. The …