Accession Number : ADA295600

Title :   Multiscale Surveillance Information Acquisition and Fusion.

Descriptive Note : Final technical rept. 1 Feb 93-31 Jan 95,

Corporate Author : MINNESOTA UNIV MINNEAPOLIS DEPT OF ELECTRICAL ENGINEERING

Personal Author(s) : Tewfik, A. H.

PDF Url : ADA295600

Report Date : MAY 1995

Pagination or Media Count : 31

Abstract : The goals of this research effort were to develop robust and adaptive array processing techniques and study adaptive radar waveform selection strategies for optimal range-Doppler imaging in a given time horizon. Specific achievements include the development of two novel wavelet based least mean squares algorithm (LMS) filtering and beamforming procedures. These procedures exploit the sparse structure of the wavelet transform of a wide class of autocorrelation matrices to derive a data dependent transformation of the input process. Their numerical complexities are comparable to those of the fast Fourier transform and discrete cosine transform based LMS techniques. However, their convergence rates are appreciably faster than those of time domain and other transform domain LMS procedures. Another achievement of this research effort is a new waveform selection strategy for optimal radar range-Doppler imaging. In particular, we have designed an optimal waveform selection strategy for the case where the radar targets to be imaged are known to belong to one of two classes. We have also identified an extension of this approach to the case where the target can belong to more than two classes. A complete study of the numerical and performance issue involved in that extension is currently under way. (MM)

Descriptors :   *DOPPLER RADAR, *RADAR TARGETS, *SEARCH RADAR, ALGORITHMS, SIGNAL PROCESSING, DATA PROCESSING, WAVEFORMS, ARRAYS, SYNTHETIC APERTURE RADAR, RADAR IMAGES, LEAST SQUARES METHOD, BEAM FORMING, ADAPTIVE SYSTEMS, CONVERGENCE, FAST FOURIER TRANSFORMS, RANGE FINDING, TIME DOMAIN, DISCRETE FOURIER TRANSFORMS.

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE