Title :
Quadratic estimators of the frequency-wavenumber spectrum
Author :
Clark, Michael P. ; Scharf, Louis L. ; Mullis, C.T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Colorado Univ., Boulder, CO, USA
Abstract :
A general representation is presented for quadratic estimators of the far-field frequency-wavenumber spectrum. The quadratic estimators are constructed from linear transformations of the array data. These linear transformations contain the windows normally associated with multiple window spectral estimators and act as multidimensional baseband beamformers. It is the selection of these windows that is most important in the design of quadratic spectral estimators. A discussion is presented of the two dimensional periodogram and the two dimensional Thomson (1982) estimator as prototypical examples of quadratic estimators
Keywords :
spectral analysis; 2D Thomson estimator; array data; far field spectrum; frequency-wavenumber spectrum; linear transformations; multidimensional baseband beamformers; quadratic estimators; two dimensional periodogram; windows; Acoustic propagation; Baseband; Contracts; Dispersion; Frequency estimation; Parametric statistics; Probability; Prototypes; Sensor arrays; Sensor systems;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1991. ICASSP-91., 1991 International Conference on
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-0003-3
DOI :
10.1109/ICASSP.1991.150775
