TAILIEUCHUNG - Báo cáo hóa học: "Research Article Adaptive S-Method for SAR/ISAR Imaging"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Adaptive S-Method for SAR/ISAR Imaging | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2008 Article ID 593216 10 pages doi 2008 593216 Research Article Adaptive S-Method for SAR ISAR Imaging LJubisa Stankovic 1 Thayananthan Thayaparan 2 Vesna Popovic 1 Igor Djurovic 1 and Milos Dakovic1 1 Electrical Engineering Department University of Montenegro 81000 Podgorica Montenegro 2 Radar Applications and Space Technology Defence Research and Development Ottawa Ontario Canada K1A 0Z4 Correspondence should be addressed to Igor Djurovic igordj@ Received 8 June 2007 Accepted 8 November 2007 Recommended by Sven Nordholm We propose the adaptive S-method-based technique for imaging of SAR and ISAR targets. This approach can be applied in the 1D and 2D modes. It is a postprocessing technique since the first stage is the standard radar imaging with the 2D Fourier transform. In addition selection of the adaptive parameter in this technique is efficient and can be performed based on simple rules in real time. The proposed technique produces highly concentrated focused radar image without interferences commonly associated with time-frequency representations and without defocusing target images that are already focused in the 2D Fourier domain. Copyright 2008 LJubisa Stankovic et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION When radar transmits an electromagnetic signal to a target the signal reflects from it and returns to radar. The reflected signal as compared to the transmitted signal is delayed changed in amplitude and possibly shifted in frequency. These parameters of the received signal contain information about the target s characteristics. For example delay is related to the target s distance from the radar. The synthetic aperture radar SAR and the inverse synthetic aperture .

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