Accession Number : ADA111829

Title :   Improving the Resolution of Bearing in Passive Sonar Arrays by Eigenvalue Analysis.

Descriptive Note : Technical rept.,

Corporate Author : RICE UNIV HOUSTON TEX DEPT OF ELECTRICAL ENGINEERING

Personal Author(s) : Johnson,Don H ; DeGraaf,Stuart

PDF Url : ADA111829

Report Date : Nov 1981

Pagination or Media Count : 35

Abstract : A method of improving the bearing-resolving capabilities of a passive array is discussed. This method is an adaptive beamforming method, having many similarities to the minimum energy approach. The evaluation of energy in each steered beam is preceded by an eigenvalue-eigenvector analysis of the empirical correlation matrix. Modification of the computations according to the eigenvalue structure result in improved resolution of the bearing of acoustic sources. The increase in resolution is related to the time-bandwidth product of the computation of the correlation matrix. However, this increased resolution is obtained at the expense of array gain. (Author)

Descriptors :   *Passive sonar, *Beam forming, *Sonar arrays, Adaptive systems, Matrices(Mathematics), Eigenvalues, Eigenvectors, Signal to noise ratio, Weighting functions, Fourier transformation, High resolution, Gain, Waveforms

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE