| 调频连续波SAR信号分析与成像研究 |
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| 引用本文： | 梁毅,王虹现,邢孟道,保铮.调频连续波SAR信号分析与成像研究[J].电子与信息学报,2008,30(5):1017-1021. |
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| 作者姓名： | 梁毅 王虹现 邢孟道 保铮 |
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| 作者单位： | 西安电子科技大学雷达信号处理重点实验室,西安,710071 |
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| 基金项目： | 国家自然科学青年基金(60502044); 教育部重点项目(20051009)资助课题 |
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| 摘 要： | 针对调频连续波SAR与脉冲式SAR工作体制的不同,从而带来不同的回波表现形式,该文对调频连续波SAR回波信号进行了建模,分析了信号的特征,揭示了平台的连续运动在距离向产生一个多普勒频移的特性,将去斜接收体制固有的残余视频相位分离成卷积的形式,并在频域完成补偿,给出了适宜于连续波SAR成像处理的改进频率变标算法,相对于原有的频率变标算法,几乎没有增加额外的运算量.最后通过点目标仿真验证了该文分析的正确性和所提算法的有效性.
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| 关 键 词： | 合成孔径雷达(SAR) 调频连续波(FMCW) 频率变标算法 残余视频相位 调频连续波 信号分析 成像处理 研究 Study Image Signal FMCW 有效性 仿真验证 点目标 运算量 增加额 算法 频率 改进 补偿 卷积 相位分离 视频 |
| 文章编号： | 1009-5896(2008)05-1017-05 |
| 收稿时间： | 2007-4-16 |
| 修稿时间： | 2007年4月16日 |
The Analysis of FMCW SAR Signal and Image Study |
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| Liang Yi,Wang Hong-xian,Xing Meng-dao,Bao Zheng.The Analysis of FMCW SAR Signal and Image Study[J].Journal of Electronics & Information Technology,2008,30(5):1017-1021. |
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| Authors: | Liang Yi Wang Hong-xian Xing Meng-dao Bao Zheng |
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| Affiliation: | National Key Lab of Radar Signal Processing, Xidian Univ, Xi’an 710071, China |
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| Abstract: | Based on the difference of work mechanism between Frequency Modulated Continuous Wave (FMCW) Synthetic Aperture Radar (SAR) and Pulse Synthetic Aperture Radar, which leads to different form of received signal, this paper establishes the model of FMCW SAR echo, analyzes its characteristics, and reveals the Doppler frequency shift effect in range direction induced by the continuous motion while radar transmitting and receiving signal. The Residual Video Phase (RVP), inherent to Dechirp-on-receive system, is represented in the form of convolution and compensated for in the frequency domain. Also Modified Frequency Scaling Algorithm is presented. Compared to the conventional method, it almost adds no additional computation load. Finally, point target simulation validates the correctness and the effectiveness of the presented method. |
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| Keywords: | Synthetic Aperture Radar (SAR) Frequency Modulated Continuous Wave (FMCW) FSA Residual Video Phase (RVP) |
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