| 引用本文: | 李建阳,常文革,王亮,等.机载UWB SAR实时信号处理算法研究.[J].国防科技大学学报,2010,32(1):57-62.[点击复制] |
| LI Jianyang,CHANG Wenge,WANG Liang,et al.Real-time Processing of Airborne Ultra-wide Band SAR[J].Journal of National University of Defense Technology,2010,32(1):57-62[点击复制] |
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| 机载UWB SAR实时信号处理算法研究 |
| 李建阳1, 常文革1, 王亮2, 李悦丽1 |
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(1.国防科技大学 电子科学与工程学院，湖南 长沙 410073;2.北京信息技术研究所，北京 100082)
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| 摘要: |
| 机载超宽带合成孔径雷达(UWB SAR)实时信号处理具有大数据量、大计算量等特点。用于实时信号处理的NCS算法需要较大的存储空间，针对这个问题，提出了改进的NCS算法，减小实时成像处理对存储空间的要求。同时，给出了UWB SAR实时信号处理的流程，分析了前向速度误差对成像质量的影响，推导了在改进NCS算法中基于测量数据的视线误差补偿的性能，采用仿真数据和实测数据对整个系统的性能进行了验证。 |
| 关键词: UWB SAR NCS 实时信号处理 运动补偿 |
| DOI： |
| 投稿日期：2009-05-20 |
| 基金项目: |
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| Real-time Processing of Airborne Ultra-wide Band SAR |
| LI Jianyang1, CHANG Wenge1, WANG Liang2, LI Yueli1 |
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(1.College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China;2.Research Institute of Information Technology, Beijing 100082, China)
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| Abstract: |
| Large data volume and computation burden are the main characteristics of real-time ultra-wide band synthetic aperture Radar (UWB SAR) processing. The nonlinear chirp scaling (NCS) algorithm adopted in the real-time processing needs large data volume. In order to reduce the data volume demand, an improved NCS algorithm is proposed. Meanwhile, the flow of Real-time UWB SAR processing is given, and the effect of forward velocity error is also analyzed, and it can be removed by real-time pulse repeat frequency (PRF) adjusting. The performance of loss of sight (LOS) compensation in improved NCS algorithm based on the data measured is analyzed. Finally, the performances of the algorithm are verified by the simulation and real UWB SAR data |
| Keywords: UWB SAR NCS real-time processing motion compensation |
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