Time-frequency-based ISAR image formation technique

Victor C. Chen

doi:10.1117/12.281581

28 July 1997 Time-frequency-based ISAR image formation technique

Victor C. Chen

Proceedings Volume 3070, Algorithms for Synthetic Aperture Radar Imagery IV; (1997) https://doi.org/10.1117/12.281581
Event: AeroSense '97, 1997, Orlando, FL, United States

Abstract

Conventional radar range-Doppler imaging uses the Fourier transform to retrieve Doppler information. Due to a target's complex motion, the Doppler frequency shifts are actually time-varying. By using the Fourier transform, the Doppler spectrum becomes smeared and the image becomes blurred. In this paper, we propose a time-frequency based ISAR image formation technique to replace the Fourier based ISAR image formation for resolving image blurring problem without resorting to sophisticated motion compensation algorithms. Some high resolution time-frequency transforms are discussed and examples of applying the time-frequency based image formation to simulated ISAR data are given.

Citation Download Citation

Victor C. Chen "Time-frequency-based ISAR image formation technique", Proc. SPIE 3070, Algorithms for Synthetic Aperture Radar Imagery IV, (28 July 1997); https://doi.org/10.1117/12.281581

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