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| LFMCWSAR非线性校正成像方法研究 | |
| 引用本文： | 曲长文,王颖,苏峰,陈波涛.LFMCWSAR非线性校正成像方法研究[J].中国电子科学研究院学报,2009,4(1). |
| 作者姓名： | 曲长文 王颖 苏峰 陈波涛 |
| 作者单位： | 1. 海军航空工程学院404教研室,山东烟台,264001 2. 海军航空工程学院404教研室,山东烟台,264001;中国人民解放军63891部队,河南,洛阳,471003 3. 中国人民解放军63891部队,河南,洛阳,471003 |
| 摘 要： | 线性调频连续波合成孔径雷达(LFMCW SAR)是一种新近提出来的成像雷达体制,它结合调频连续波与合成孔径成像技术,具有体积小、重量轻、成本低、分辨率高等一系列优点.然而,由于受系统的影响,调频信号的频率和时间并不完全满足线性关系.在详细分析了LFMCW的调频非线性对距离分辨率及FMCW SAR成像质量的影响之后,提出使用分段线性拟合的方法估计调频信号的非线性,并提出了非线性的校正方法,研究了存在非线性时的FMCW SAR成像算法,并给出了仿真结果,验证了该方法的有效性. |
| 关 键 词： | 线性调频连续波 合成孔径雷达 线性度 非线性校正 距离分辨率 |
Research on Nonlinearity Correction Imaging Method of LFMCW SAR |
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| QU Chang-wen,WANG Ying,SU Feng,CHEN Bo-tao.Research on Nonlinearity Correction Imaging Method of LFMCW SAR[J].Journal of China Academy of Electronics and Information Technology,2009,4(1). | |
| Authors: | QU Chang-wen WANG Ying SU Feng CHEN Bo-tao |
| Affiliation: | 1.Department of Electronic and Information Engineering of Naval Aeronautical Engineering Institute;Shandong Yantai 264001;China;2.Army Unit 63891 of PLA;Henan Luoyang 471003;China |
| Abstract: | The linear frequency modulated continuous wave synthetic aperture radar(FMCW SAR)is a newly proposed radar imaging system,which combines FMCW technique with synthetic aperture imaging methods.It has many advantages of being small in size,light in weight,cost-effective and with high-resolution.In practical SAR system,however,the frequency and time of the frequency modulated signal cannot keep absolute linearity.The effects of nonlinear frequency modulation on range resolution and FMCW SAR imaging are analyze... |
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