Adaptive time-frequency ISAR processing

Victor C. Chen

doi:10.1117/12.257216

5 November 1996 Adaptive time-frequency ISAR processing

Victor C. Chen

Proceedings Volume 2845, Radar Processing, Technology, and Applications; (1996) https://doi.org/10.1117/12.257216
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

Conventional radar processors use the Fourier transform to retrieve Doppler information. In order to use the Fourier transform adequately, some restrictions must be applied: the scatterers must remain in their range cells and their Doppler frequency contents should be stationary during the entire imaging time duration. If the Doppler frequency contents are time-varying, the Doppler spectrum obtained from the Fourier transform becomes smeared, and, thus the image resolution is degraded. However, the restrictions on the Fourier processing can be lifted if the Doppler information can be retrieved with the time-frequency transform which does not require a stationary Doppler spectrum. Therefore, the image blurring caused by the time- varying Doppler spectrum can be resolved without applying sophisticated motion compensation techniques to the individual scatterers.

Citation Download Citation

Victor C. Chen "Adaptive time-frequency ISAR processing", Proc. SPIE 2845, Radar Processing, Technology, and Applications, (5 November 1996); https://doi.org/10.1117/12.257216

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