Title :
Two-dimensional non-uniform FFT for image formation of high-squint SAR
Author :
Shunsheng Zhang ; Chan Liu
Author_Institution :
Res. Inst. of Electron. Sci. & Technol., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
The high-resolution imaging for high-squint synthetic aperture radar (SAR) is still a difficult issue due to large range migration and strong range dependence. An extended keystone transform (EKT) is introduced to correct more complex range cell migration and range-variant, then a two-dimensional non-uniform fast Fourier transform (2D NUFFT) is proposed to obtain the focused image. Simulation results are given to validate the effectiveness of the method.
Keywords :
fast Fourier transforms; image resolution; radar imaging; synthetic aperture radar; 2D NUFFT; 2D nonuniform FFT; 2D nonuniform fast Fourier transform; EKT; complex range cell migration; extended keystone transform; high-resolution imaging; high-squint SAR; high-squint synthetic aperture radar; image formation; range-variant; Azimuth; Fast Fourier transforms; Imaging; Synthetic aperture radar; Time-frequency analysis; extended keystone transform (EKT); high-squint SAR; range cell migration (RCM); two-dimensional non-uniform FFT (2D FFT);
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2014 IEEE International
Conference_Location :
Quebec City, QC
DOI :
10.1109/IGARSS.2014.6946505
