Accession Number : ADA184165

Title :   Delay-Doppler Radar Imaging.

Descriptive Note : Semi-annual progress rept. no. 2, 1 Dec 86-30 May 87,

Corporate Author : WASHINGTON UNIV ST LOUIS MO ELECTRONIC SYSTEMS AND SIGNALS RESEARCH LAB

Personal Author(s) : Snyder, Donald L

PDF Url : ADA184165

Report Date : 30 May 1987

Pagination or Media Count : 111

Abstract : The goal of this project is to formulate and investigate new approaches for forming images of radar targets from spotlight-mode, delay-doppler measurements. These measurements could be acquired with a high-resolution radar-imaging system operating with an optical or radio frequency carrier. Two approaches are under study. The first is motivated by an image-reconstruction algorithm used in radionuclide imaging called the confidence-weighted algorithm. The second is one based on more fundamental principles which starts with a mathematical model that accurately describes the physics of an imaging radar-system and then uses statistical-estimation theory with this model to derive processing algorithms. Spotlight-mode high-resolution radar-imaging relies upon the relative motion between the transmitter, target, and receiver. The target is illuminated by a series of transmitted pulses. The return for each pulse is a superposition of reflections from various locations on the target, with each location affecting the pulse by introducing both a delay and a doppler shift. The returns are processed to produce an image of the target.

Descriptors :   *DOPPLER EFFECT, *RADAR TARGETS, *IMAGES, *MOTION, TARGETS, MATHEMATICAL MODELS, PHYSICS, RADIOACTIVE ISOTOPES, POSITION(LOCATION), FREQUENCY, OPTICAL PROPERTIES, ALGORITHMS, PROCESSING, RADIOFREQUENCY

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE