A beam pattern design procedure for multidimensional sonar arrays employing minimum variance beamforming
Abstract
This paper develops a beam pattern design procedure for general multidimensional irregular sonar arrays that incorporates the not well understood effects of array geometry into the design process. The procedure is implemented by generating a penalty function in a spectral covariance function form. Processing the penalty function causes beam pattern high sidelobes to be penalized and the main lobe to be emphasized. This is accomplished by forming the penalty function in terms of an isotropic noise field of specified strength modified with a finite sector of low coherent energy and stabilized with incoherent sensor noise. By inputting the penalty function into a minimum variance beamformer, the beam pattern and aperture weights are calculated based on the given array geometry. The beamformer used is Capon's Maximum Likelihood Method. The array used to test the procedure is located on sixty degree sector of a cylindrical surface. The procedure is implemented by two different methods, each with some desirable characteristics. One method suppresses sidelobes indirectly by the enhancement of the main lobe with anti-nulls. Both methods are evaluated in terms of a sensitivity factor which constrains the maximum white noise array gain. (Author)
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
Related items
Showing items related by title, author, creator and subject.
-
Optimization of Marine Forces Reserve equipment redistribution
Martinez, Nicolas L. (Monterey, California: Naval Postgraduate School, 2016-06);This research creates the Marine Corps Equipment Redistribution Model (MCERM). MCERM is a mathematical optimization model that can be used as a decision-support prototype to guide Marine Forces Reserve (MARFORRES) in ... -
Evaluating Simulated Annealing for the Weighted-Region Path-Planning Problem
Kindl, Mark R.; Rowe, Neil C. (Monterey, California. Naval Postgraduate School, 2012-03);This paper describes an efficient stochastic algorithm for planning near-optimal paths for a point agent moving through twodimensional weighted-region terrain from a specified start point to a specified goal point. ... -
A theoretical study and computer search for binary sequences having specific auto-correlation functions
Anastasopoulos, Ioannis (Monterey, California. Naval Postgraduate School, 1978-12);Binary sequences find increasing use in electrical engineering applications of ranging, time measurement and communications. A property of interest in these applications is the autocorrelation function of the binary ...