Target image enhancement in radar imaging using fractional Fourier transform

被引：4
|
作者：
El-Mashed M.G. [1 ]
Dessouky M.I. [1 ]
El-Kordy M. [1 ]
Zahran O. [1 ]
Abd El-Samie F.E. [1 ]
机构：
[1] Department of Electronics and Electrical Communications, Faculty of Electronic Engineering, Menoufia University
来源：
Sensing and Imaging: An International Journal | 2012年 / 13卷 / 1期
关键词：
Azimuth; Chirp signal; RDA-FrFT; Resolution; SAR;
D O I：
10.1007/s11220-011-0069-y
中图分类号：
学科分类号：
摘要：
This paper presents a new Range-Doppler Algorithm based on Fractional Fourier Transform (RDA-FrFT) to obtain High-Resolution (HR) images for targets in radar imaging. The performance of the proposed RDA-FrFT is compared with the classical RDA algorithm, which is based on the Fast Fourier Transform (FFT). A closed-form expression for the range and azimuth compression of the proposed RDA-FrFT is mathematically derived and analyzed from the HR Synthetic Aperture Radar (SAR) imaging point of view. The proposed RDA-FrFT takes its advantage of the property of the FrFT to resolve chirp signals with high precision. Results show that the proposed RDA-FrFT gives low Peak Side-Lobe (PSL) and Integrated Side-Lobe (ISL) levels in range and azimuth directions for detected targets. HR images are obtained using the proposed RDA-FrFT algorithm. © 2011 Springer Science+Business Media, LLC.
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收藏
页码：37 / 53
页数：16
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