摘要
提出了一种适用于单发多收合成孔径雷达成像的频域算法。该方法利用傅里叶变换将回波数据变换至波数域进行扩维,建立了波数域的补偿关系,从而在波数域实现了对波前弯曲的精确补偿,因此具有较高的成像精度,并且可以用于近场三维成像。另外,该方法采用基于快速傅里叶变换的成像结构显著提高了成像效率。理论分析和实验结果表明,与后向投影算法相比,该方法能够获得相同成像结果的同时大大降低运算量。
A frequency-domain imaging method for single-input multiple-output synthetic aperture radar is proposed.This method transforms the measurements into the wavenumber domain,and then the compensation relation is obtained by utilizing the dimension-increasing operation.The curvature of the wavefront is completely compensated in wavenumber-domain.Therefore,it has high accuracy and can be applied in near-field three-dimensional imaging scenes.In addition,its fast Fourier transform based scheme provides high imaging efficiency.Both theoretical analysis and experimental results show that the proposed method has the same imaging result as the backprojection algorithm but with lower computational load.
作者
朱荣强
周剑雄
付强
ZHU Rongqiang;ZHOU Jianxiong;FU Qiang(ATR Laboratory, School of Electronic Science, National University of Defense Technology, Changsha 410073, China)
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2018年第4期756-761,共6页
Systems Engineering and Electronics
基金
国家自然科学基金(61601424)
国家自然科学基金委员会-中国工程物理研究院联合基金(U1630101)资助课题
关键词
单发多收合成孔径雷达
雷达成像
近场成像
频域成像算法
single-input multiple ontput synthetic aperture rada (SIMO-SAR)
radar imaging
near-field imaging
frequency-domain imaging method
