Transactions of Nanjing University of Aeronautics & Astronautics
聚束式SAR中卷积反投影算法的快速实现
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Abstract:
A fast implementation of the convolution backprojection (CBP) algorithm in spotl ight synthetic aperture radar (SAR) is presented based on the fast Fourier transform(FFT). Traditionally, the computation of the ′backprojection′ process is expensive, since resampling in t he process is implemented by using the interpolation operation. By analyzing the relative location relationship among different pixels, the algorithm realizes the ′backprojection′ using a series of FFTs instead of the interpola tion operation. The po int target simulation validates that the new algorithm acce lerates the CBP algorithm, and the computational rate increases about 85％.
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Project Supported:
Supported by the National Natural Science Foundation of China(61071165);the Aeronautical Science Foundation of China(20080152004); the Ph.D. Programs Foundation of Ministry of E ducation of China (20070280531);the Program for New Century Excellent Talents in University(NCET ０９００６９）.
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