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Detection and CountermeasuresActive & Passive Radar Detection & Equipment

Application of Time-Frequency Representations To Non-Stationary Radar Cross Section

Authors: John McShane; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
 
Abstract: Radar Cross Section imaging of a non-wide sense stationary signal poses significant problems in identifying scattering centers in the post processed radar-generated image. A non-wide sense stationary RCS is typically encountered when moving parts on the target impress a phase shift into the backscatter signal that is uncorrelated to the previous return pulse. When the Fourier transform of the phase shifted complex signal is taken, range and cross range information on scattering centers are misplaced. Time Frequency Representations must be used to help locate these scattering centers so they can be properly treated to reduce the target's RCS and increase its survivability. This thesis analyzes and compares various TFRs on non-wide sense stationary signals in hope of providing test centers with better methods for locating scattering centers under time variant conditions.

Limitations: APPROVED FOR PUBLIC RELEASE
Description: Master's thesis
Pages: 227
Report Date: Mar-2009
Report Number: A503005
Keywords relating to this report:
*RADAR CROSS SECTIONS
FOURIER TRANSFORMATION
IMAGE PROCESSING
MOVING TARGETS
PHASE SHIFT
RADAR TARGETS
SCATTERING
THESES
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