An Improved FS Algorithm for Range Anti-aliasing of FMCW SAR
Zhang Feng-hui①② Wang Yan-fei①
① (Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)② (Institute of 804, Shanghai Aerospace Technology Academy, Shanghai 200101, China)
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Abstract Conventional Frequency Scaling (FS) algorithm is applied to process Frequency Modulated Continuous Wave (FMCW) SAR, which will lead a heavy range frequency aliasing. Through analyzing basic principle of the FS algorithm and combining the scaling propertation of the Fourier transform, with the presence of a constant factor, this paper proposed a improved frequency scaling algorithm for range anti-aliasing. The proposed algorithm holds performance of the conventation one and just removes the aliasing. The successfully imaging a point target shows the validity of the proposed method.
Key words ： Frequency Modulated Continuous Wave (FMCW)
SAR
Frequency scaling
Residual video phase
Received: 2011-12-26;
Published: 2012-03-28
Fund: null
Cite this article:
ZHANG Feng-Hui,WANG Yan-Fei. An Improved FS Algorithm for Range Anti-aliasing of FMCW SAR[J]. JOURNAL OF RADARS, 2012, 1(1): 76-81.
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2012, Vol. 1 
