Title :
MSE of diagonally loaded Capon beamformer-based power spectrum estimator in snapshot deficient regime
Author :
Pajovic, Milutin ; Preisig, James C. ; Baggeroer, A.B.
Author_Institution :
M.I.T./W.H.O.I., Cambridge, MA, USA
Abstract :
A Capon beamformer processes the input signal such that the output power is minimized and the signal arriving from a look direction is undistorted. This paper presents a theoretical study of the estimation mean square error of a diagonally loaded Capon beamformer-based spatial power estimator in the snapshot deficient regime. The derived characterization is validated via simulations. Additionally, a strong sensitivity of the mean square estimation error to diagonal loading when beamformer is steered close to source direction has been observed.
Keywords :
array signal processing; direction-of-arrival estimation; mean square error methods; MSE; diagonally loaded Capon beamformer; estimation mean square error; look direction; power spectrum estimator; snapshot deficient regime; spatial power estimator; Capon beamformer; Gaussian method; direction of arrival; power estimation;
Conference_Titel :
Signals, Systems and Computers (ASILOMAR), 2012 Conference Record of the Forty Sixth Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
978-1-4673-5050-1
DOI :
10.1109/ACSSC.2012.6488991
