Array Signal Processing: Concepts and Techniques
Array Signal Processing: Concepts and Techniques
A well-conditioned estimator for large-dimensional covariance matrices
Journal of Multivariate Analysis
Automatic robust adaptive beamforming via ridge regression
Signal Processing
Review of user parameter-free robust adaptive beamforming algorithms
Digital Signal Processing
Robust adaptive beamformers based on worst-case optimization and constraints on magnitude response
IEEE Transactions on Signal Processing
Shrinkage algorithms for MMSE covariance estimation
IEEE Transactions on Signal Processing
A robust adaptive beamformer based on worst-case semi-definite programming
IEEE Transactions on Signal Processing
A new approach to robust beamforming in the presence of steeringvector errors
IEEE Transactions on Signal Processing
Robust minimum variance beamforming
IEEE Transactions on Signal Processing
On robust Capon beamforming and diagonal loading
IEEE Transactions on Signal Processing
A projection approach for robust adaptive beamforming
IEEE Transactions on Signal Processing
Robust adaptive beamforming for general-rank signal models
IEEE Transactions on Signal Processing
IEEE Transactions on Signal Processing
On Using a priori Knowledge in Space-Time Adaptive Processing
IEEE Transactions on Signal Processing
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If there is a mismatch between the assumed steering vector (SV) and the real value, the performance of adaptive beamforming methods is degraded. When the signal SV is known exactly but the sample size is small, the performance degradation can also occur. The second kind of degradation is mainly due to the mismatch between the sample covariance matrix and the real one. Almost all existing robust adaptive beamformers are proposed to improve the robustness against these two types of mismatch. Indeed, most of them are user parameter dependent, and the user parameter-free robust beamformers are scarce. As one of the shrinkage methods, the general linear combination (GLC) based beamformer is a good user parameter-free robust beamformer. However, it is only suitable for the scenarios with low sample size and/or small SV mismatch. In this paper, we propose a new robust beamformer, and it is based on general linear combination in tandem with SV estimation (GLCSVE). The proposed approach is superior to GLC in two aspects. One is that the GLCSVE beamformer performs well not only with small but also with large sample size. The other is that the GLCSVE can effectively deal with a large range of SV mismatch. Moreover, the proposed GLCSVE approach is a user parameter-free robust beamformer, and is more suitable for application than the parameter dependent approaches. The idea of our method can also be used to enhance other shrinkage based beamformers.