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基于曲线合成孔径雷达的三维目标特征提取
Alternative TitleThree D imensional Target Feature Extraction Using Curvil inearSynthetic Aperture Radar
刘浩; 吴季; 北京8701信箱
Department国家863计划微波遥感技术实验室
Source Publication遥感技术与应用
2004
Volume19Issue:6Pages:493-497
ISSN1004-0323
Language中文
Keyword曲线合成孔径雷达 三维目标特征提取 relax算法
Abstract介绍了曲线合成孔径雷达(CLSAR)的基本概念,推导了CLSAR的chirp信号回波数据模型,并在此基础上对CLSAR的三维目标重建机理进行了详细的分析.指出由于旁瓣的影响,传统的基于FFT的反演成像方法在曲线孔径下不再有效,进而采用基于谱估计的RELAX算法实现三维目标的特征提取.最后,通过系统仿真,验证了CLSAR利用RELAX算法实现三维目标特征提取的有效性和优越性.
Other AbstractIn th is paper, the concep t of Curvilinear Synthetic Aperture Radar(CLSAR)is introduced and the returned ch irp signal datamodel for CL SAR is described. Based on th ismodel, the p rincip le of th ree dimensional target reconstruction of CL SAR is analyzed detailedly.The 2D FFT analysis is conducted in the Cross range- Elevation plane of the curvilinear apertures, and the results show that the traditional FFT- based SAR imaging method is no longer practical in the curvilinear apertures situation because of the effect of large side lobe.As the substitution of the FFT- based imaging method, the 3D target feature extraction method using RELAX algorithm based on spectrum estimation is introduced to solve the sidelobe problem.It has already been proved that the RELAX algorithm can be used efficiently to estimate the dom inant scatters'discrete spectrum parameters from the noise and clutter's continuous spectrum if the targets can be divided into several dom inant scatters. Furthermore,the computer simulation of the ideal full aperture and several specific curvilinear apertures are conducted.The simulation results show the validities and advantages of the RELAX2based 3D target feature extraction method for CLSAR.And the results also show that the parabolic aperture is the relative op timal choice among the curvilinear aperturesw e used in the simulation.
Indexed ByCSCD
Funding Project中国科学院空间科学与应用研究中心
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1934
Collection微波遥感部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
刘浩,吴季,北京8701信箱. 基于曲线合成孔径雷达的三维目标特征提取[J]. 遥感技术与应用,2004,19(6):493-497.
APA 刘浩,吴季,&北京8701信箱.(2004).基于曲线合成孔径雷达的三维目标特征提取.遥感技术与应用,19(6),493-497.
MLA 刘浩,et al."基于曲线合成孔径雷达的三维目标特征提取".遥感技术与应用 19.6(2004):493-497.
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