access icon free Fully automatic robust adaptive beamforming using the constant modulus feature

The diagonal loading (DL) technique is the most widely used method to improve the robustness of the Capon beamformer in the presence of imprecise knowledge of the covariance matrix and the desired signal's steering vector. The selection of the DL level is challenging in practice and might depend on some user-defined parameters which are possibly hard to be determined. A fully automatic and training-free method for the DL level selection is herein presented to extract the desired signal with constant modulus, which is a common feature for communication signals. Simulated results of the beamforming performance have demonstrated the efficacy of the proposed method.

Inspec keywords: adaptive signal processing; covariance matrices; array signal processing

Other keywords: communication signals; fully automatic robust adaptive beamforming; signal steering vector; constant modulus feature; diagonal loading technique; training-free method; covariance matrix; DL level selection technique; user-defined parameters; Capon beamformer

Subjects: Algebra; Signal processing theory; Signal processing and detection; Algebra

References

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