Airborne multi-frequency-band SAR system and its information processing

• Published in: IET International Conference on Radar Systems 2007 p. 185
• Main Authors: Chang Wenge, Li Xiangyang, Li Yueli, Chang Yulin
• Format: Conference Proceeding
• Language: English
• Published: Stevenage IET 2007
• Subjects: Integral transforms; Optical, image and video signal processing; Radar equipment, systems and applications; airborne multifrequency-band sar system; information processing; image formation; wavelet transforms; image fusion; image registration; multiwavelet transform; subsection phase correlation; motion compensation; image motion analysis; synthetic aperture radar; radar imaging; nonlinear chirp scaling algorithm; image resolution
• ISBN: 0863418481; 9780863418488
• DOI: 10.1049/cp:20070661

This paper describes the design of a multi-frequency band (MFB) SAR system and the flight tests, and discusses the methods of image formation, registration and fusion. Some experiment results are also presented. The MFB SAR system works in time-division mode so as to improve the compatibility of subsystems and to decrease the volume and the weight of the system. The MFB SAR images of the same scene are presented and some conclusion is made from the flight tests. Nonlinear chirp scaling algorithm is used to form the MFB SAR images. The problems of motion compensation for P-band SAR are analyzed. A new registration method is introduced based on subsection phase correlation, which can rectified the coordinates of the MFB SAR images with registration error less than 1 pixel. Finally, the MFB SAR images are fused based on the GHM multi-wavelet transform. (5 pages)