8 March 2002 Radon transforms and time-frequency representations for ISAR motion compensation and imaging
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Abstract
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.
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Phillippe Steeghs, Phillippe Steeghs, Leon Kester, Leon Kester, Sjoerd Gelsema, Sjoerd Gelsema, } "Radon transforms and time-frequency representations for ISAR motion compensation and imaging", Proc. SPIE 4738, Wavelet and Independent Component Analysis Applications IX, (8 March 2002); doi: 10.1117/12.458738; https://doi.org/10.1117/12.458738
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