A ROBUST FORMULATION OF THE OPTIMUM CROSS-SPECTRAL BEAMFORMER FOR LINE ARRAYS

Authors
  1. Maksym, J.N.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
For linear arrays of equi-spaced hydrophones the power-directional spectrum can be computed efficiently from the cross-spectral matrix by means of the fast Fourier transform. We show how this can be done when the estimator structure is the conventional beamformer, and also when the estimation is accomplished by optimum (minimum variance) beamforming. It is shown that by computing a measure of superdirectivity it is possible to form a more robust estimate of the power-directional spectrum, as a linear combination of the other two estimates. Since the computations are done with the averaged cross-spectral matrix the additional computer loading is small.
Report Number
DREA-78-3 —
Date of publication
15 Jun 1979
Number of Pages
8
Reprinted from
J Acoust Soc Am, vol 65, no 4, 1979, p 971-975
DSTKIM No
80-00033
CANDIS No
87931
Format(s):
Hardcopy;Originator's fiche received by DSIS

Permanent link

Document 1 of 1

Date modified: