Radon transforms and time-frequency representations for ISAR motion compensation and imaging

Phillippe Steeghs; Leon Kester; Sjoerd Gelsema

doi:10.1117/12.458738

8 March 2002 Radon transforms and time-frequency representations for ISAR motion compensation and imaging

Phillippe Steeghs, Leon Kester, Sjoerd Gelsema

Proceedings Volume 4738, Wavelet and Independent Component Analysis Applications IX; (2002) https://doi.org/10.1117/12.458738
Event: AeroSense 2002, 2002, Orlando, FL, United States

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.

Citation Download Citation

Phillippe Steeghs, Leon Kester, and 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); https://doi.org/10.1117/12.458738

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