| 调频连续波SAR改进的频率尺度变换算法(英文) |
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| 引用本文： | 江志红,皇甫堪,万建伟,程翥. 调频连续波SAR改进的频率尺度变换算法(英文)[J]. 中国航空学报, 2007, 20(4): 339-345 |
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| 作者姓名： | 江志红 皇甫堪 万建伟 程翥 |
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| 作者单位： | 国防科技大学电子科学与工程学院，国防科技大学电子科学与工程学院，国防科技大学电子科学与工程学院，国防科技大学电子科学与工程学院 湖南长沙 410073，湖南长沙 410073，湖南长沙 410073，湖南长沙 410073 |
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| 摘 要： | 本文提出了一种调频连续波SAR改进的频率尺度变换算法。调频连续波SAR在运动过程中持续不断地发射和接收信号,这种运动导致了回波信号的伸缩,对波前重建产生了严重的影响。推导了回波信号模型,给出了信号的距离-多普勒域表达式,分析了由于天线不断运动而导致的相位变化与方位向频率之间的关系。改进的频率尺度变换算法补偿了这种相位变化,实现了目标的精确成像,仿真结果表明了分析的正确性和算法的有效性。
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| 关 键 词： | 调频连续波雷达 合成孔径雷达 雷达成像 频率尺度变换算法 |
Modified Frequency Scaling Algorithm for FMCW SAR Data Processing |
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| Jiang Zhihong,Huang Fukan,Wan Jianwei,Cheng Zhu. Modified Frequency Scaling Algorithm for FMCW SAR Data Processing[J]. Chinese Journal of Aeronautics, 2007, 20(4): 339-345 |
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| Authors: | Jiang Zhihong Huang Fukan Wan Jianwei Cheng Zhu |
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| Abstract: | This paper presents a modified frequency scaling algorithm for frequency modulated continuous wave synthetic aperture radar(FMCW SAR) data processing. The relative motion between radar and target in FMCW SAR during reception and between transmission and reception will introduce serious dilation in the received signal. The dilation can cause serious distortions in the reconstructed images using conventional signal processing methods. The received signal is derived and the received signal in range-Doppler domain is given.The relation between the phase resulting from antenna motion and the azimuth frequency is analyzed. The modified frequency scaling algorithm is proposed to process the received signal with serious dilation. The algorithm can effectively eliminate the impact of the dilation. The algorithm performances are shown by the simulation results. |
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| Keywords: | FMCW radar SAR radar imaging frequency scaling algorithm |
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