Spectrum analysis of SAR image in polar grid system for back projection algorithm

Song Zhou, Lei Yang, Lifan Zhao, G. Bi
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引用次数: 1

Abstract

In this paper, the analytic expression of synthetic aperture radar (SAR) image spectrum in the polar grid system is derived based on the wavenumber analysis. By revealing the relationship between wavenumber variable and image spectrum in the polar system, we can better understand the mechanism of fast factorized BP (FFBP) processing. Moreover, the form of phase error in spectral domain can be possibly revealed which will facilitate motion compensation and autofocusing in FFBP processing. Simulation results are presented and analyzed to demonstrate the validity of the derived spectrum.
极坐标网格系统SAR图像光谱分析的反投影算法
本文基于波数分析,推导了合成孔径雷达(SAR)图像在极栅系统下的光谱解析表达式。通过揭示极性系统中波数变量与图像光谱之间的关系,我们可以更好地理解快速分解BP (FFBP)处理的机理。此外,还可以揭示谱域相位误差的形式,为FFBP处理中的运动补偿和自动对焦提供方便。给出了仿真结果并对其进行了分析,验证了所得频谱的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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