Now showing items 11-20 of 35
GENERALIZED REPLACEMENT IN ITERATIVE RESTORATION ALGORITHMS
A new formulation of an iterative restoration algorithm is presented in this dissertation for the solution of noisy, non-linear restoration problems. The constraints and distortions are assumed to be known and are modeled ...
OPTIMAL ARRAYS FOR NARROWBAND BEAMFORMING
We develop equations describing the capability of arbitrary three-dimensional arrays to resolve and detect two narrowband sources using conventional (CONV) beamforming, minimum energy (ME) adaptive beamforming, and linear ...
OPTIMAL ESTIMATION FOR BANDLIMITED SIGNALS
The problem of estimation for bandlimited signals is investigated. The desired estimate is based on a finite number of time samples taken from a measurement interval of length T(,M). With no additional information, the ...
A NOVEL FRAMEWORK FOR SURFACE RECONSTRUCTION FROM 3-DIMENSIONAL CONTOURS
In many applications, such as computer vision, medical imaging, scene forming, and motion animation, surface data is available in the form of two-dimensional (2D) or three-dimensional (3D) contours. Reconstruction of the ...
A HIGH RESOLUTION DATA-ADAPTIVE TIME-FREQUENCY REPRESENTATION
The short-time Fourier transform and the Wigner distribution are the time-frequency representations that have received the most attention. The Wigner distribution has a number of desirable properties, but it introduces ...
THE DISCRETE RADON TRANSFORM WITH APPLICATIONS TO TIME DOMAIN BEAMFORMING
Performing a discrete Radon transform (DRT) with an array of space-time samples results in a function of slowness (inverse velocity) and time intercept. Time domain beamforming and semblance, two commonly used methods of ...
PARAMETRIC AND NON-PARAMETRIC METHODS OF IMPROVING BEARING ESTIMATION IN NARROWBAND PASSIVE SONAR SYSTEMS
Two approaches--one parametric and one non-parametric--to the source bearing estimation problem for narrowband passive sonar are presented. The parametric technique does not directly involve estimation of a spatial spectrum. ...
GEOMETRY OF PARTIAL SUMS