Accession Number:

ADA247502

Title:

Beamforming with Dolph-Chebyshev Optimization and Other Conventional Methods.

Descriptive Note:

Final rept.,

Corporate Author:

NAVAL OCEANOGRAPHIC AND ATMOSPHERIC RESEARCH LAB STENNIS SPACE CENTER MS

Personal Author(s):

• George, J.

Report Date:

1991-10-01

Pagination or Media Count:

42.0

Abstract:

In conventional beamforming, several shading methods are available to optimize the mainlobe width and the sidelobe levels for specific situations. These include Gaussian, Hann, and Dolph-Chebyshev methods. The Dolph-Chebyshev optimization method is of special interest, because it allows minimization of mainlobe width for a specific sidelobe level. Perhaps the best account of the Dolph-Chebyshev method in the widely available literature is found in a book by Albers, where the method is described only in terms of specific examples. In order to facilitate the Dolph-Chebyshev computation for an arbitrary number N even or odd of phones, a convenient set of recursion relations are presented in this technical note. A listing of our FORTRAN program Steer, and graphical examples are given, comparing the features of the different methods.

Descriptors:

• *UNDERWATER ACOUSTICS
• *BEAM FORMING
• ACOUSTICS
• AMBIENT NOISE
• COMPUTATIONS
• FORTRAN
• NOISE
• OPTIMIZATION
• PROPAGATION
• SCATTERING
• SIDELOBES
• SURFACES
• UNDERWATER
• WIDTH
• ACOUSTIC WAVES
• WAVE PROPAGATION
• HYDROPHONES
• ACOUSTIC ARRAYS

Subject Categories:

• Acoustics
• Target Direction, Range and Position Finding

Distribution Statement:

APPROVED FOR PUBLIC RELEASE