Acoustic vector-sensor beamforming and Capon direction estimation

Author

Hawkes, Malcolm ; Nehorai, Arye

Author_Institution

Dept. of Electr. Eng., Yale Univ., New Haven, CT, USA

Volume

3

fYear

1995

fDate

9-12 May 1995

Firstpage

1673

Abstract

We consider beamforming and Capon direction of arrival (DOA) estimation using arrays of acoustic vector sensors. We derive an expression for the Cramer-Rao bound (CRB) on the DOA parameters of a single source. Using this, we give conditions that minimize the lower bound on the asymptotic mean-square angular error, and conditions that ensure it is isotropic. The asymptotic performance of the Capon (1969, 1971) and beamforming estimators is analyzed and compared with a scalar-sensor array. The vector-sensor array is seen to have improved performance due to its elements´ directional sensitivity. Large sample approximations for the mean-square error (MSE) matrices of the estimators are derived. Throughout, we compare vector-sensor arrays with their scalar-sensor counterparts

Keywords

acoustic arrays; acoustic signal processing; approximation theory; direction-of-arrival estimation; error analysis; matrix algebra; signal sampling; Capon direction estimation; Cramer-Rao bound; DOA parameters; acoustic vector-sensor beamforming; asymptotic mean-square angular error; asymptotic performance; beamforming estimators; directional sensitivity; large sample approximations; lower bound; mean-square error matrices; scalar-sensor array; vector-sensor array; Acoustic arrays; Acoustic measurements; Acoustic sensors; Array signal processing; Direction of arrival estimation; Particle measurements; Pressure measurement; Sea measurements; Sensor arrays; Velocity measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1995. ICASSP-95., 1995 International Conference on

Conference_Location

Detroit, MI

ISSN

1520-6149

Print_ISBN

0-7803-2431-5

Type

conf

DOI

10.1109/ICASSP.1995.479926

Filename

479926