Title :
Robust adaptive beamforming using low-complexity correlation coefficient calculation algorithms
Author :
Fengfeng Chen ; Feng Shen ; Jinyang Song
Author_Institution :
Dept. of the Coll. of Autom., Harbin Eng. Univ., Harbin, China
Abstract :
A robust adaptive beamforming technique based on a reconstructed covariance matrix and array steering vector (ASV) estimation using low-complexity algorithms is proposed. The spatial spectrum estimator is used to reconstruct the interference-plus-noise covariance matrix and the ASV estimation process is used to calculate the correlation coefficients of the assumed ASV and the eigenvectors. Contrary to other robust adaptive beamforming methods, this approach has better performance yet does not involve any specific optimisation programme even if arbitrary ASV imperfections are considered. Simple implementation and significant signal-to-interference-plus-noise ratio enhancement support the practicability of the proposed method.
Keywords :
array signal processing; covariance matrices; eigenvalues and eigenfunctions; ASV estimation process; ASV imperfections; IPN covariance matrix; SINR enhancement; eigenvectors; interference-plus-noise; low-complexity correlation coefficient calculation algorithms; reconstructed covariance matrix; robust adaptive beamforming method; signal-to-interference-plus-noise ratio; spatial spectrum estimator; steering vector estimation;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2015.0263