Radon transforms and time-frequency representations for ISAR motion compensation and imaging
conference paper
The use of the Radon transform and the Wigner-Radon power spectrum for ISAR motion compensation is described. It is shown that the local Radon power spectrum is closely related to the Cohen's class of quadratic time-frequency representations in a similar way as the Radon and Fourier transform are related. The peak of the local Radon transform is used as a measure for the velocity towards the radar of a moving target. The velocity estimate can be used to align the range profiles and perform target radial motion correction. Another application of the Radon transformation is the correction for time-variation of Doppler frequency of the signal during the Coherent Processing Interval. The Radon transform of the cross-range time-frequency representation of the signal is used for focusing an ISAR image that has been blurred due to non-uniform target rotation.
Topics
ISARMotion compensationRadon transformationTime-frequency analysisDoppler effectFocusingInverse synthetic aperture radarMathematical modelsMotion compensationProbability distributionsRadar imagingVelocity measurementCoherent processing intervalTime frequency representationsWigner-Radon power spectrumFourier transforms
TNO Identifier
236424
ISSN
0277786X
Source title
Wavelet and Independent Component Analysis Applications IX, 3 April 2002 through 5 April 2002, Orlando, FL, Conference code: 60208
Editor(s)
Szu H.H.
Buss J.R.
Buss J.R.
Pages
252-263
Files
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