| 星载SAR DPCMAB技术的方位向非均匀采样研究 |
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| 引用本文： | 范强, 吕晓德, 张平, 许猛. 星载SAR DPCMAB技术的方位向非均匀采样研究[J]. 电子与信息学报, 2006, 28(1): 31-35. |
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| 作者姓名： | 范强 吕晓德 张平 许猛 |
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| 作者单位： | 中国科学院电子学研究所,北京,100080;中国科学院电子学研究所,北京,100080;中国科学院电子学研究所,北京,100080;中国科学院电子学研究所,北京,100080 |
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| 摘 要： | 在星载SAR分离相位中心方位多波束(DPCMAB)系统中，发射脉冲盲区和星下点回波盲区的存在会引起方位向非均匀采样，从而在方位向冲激响应的主瓣两侧产生不期望的尖峰。该文采用Spectral-Fit法和时域重构法在不影响图像性能的基础上，消除了非均匀采样带来的影响。最后通过对两者运算量的分析，指出时域重构法优于Spectral-Fit法。
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| 关 键 词： | 星载SAR 分离相位中心方位多波束 方位向非均匀采样 Spectral-Fit法 时域重构法 |
| 文章编号： | 1009-5896（2006）01-0031-05 |
| 收稿时间： | 2004-07-20 |
| 修稿时间： | 2004-11-15 |
Study of Nonuniform Azimuth Sampling of DPCMAB Technique in Spaceborne SAR |
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| Fan Qiang, Lü Xiao-De, Zhang Ping, Xu Meng. Study of Nonuniform Azimuth Sampling of DPCMAB Technique in Spaceborne SAR[J]. Journal of Electronics & Information Technology, 2006, 28(1): 31-35. |
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| Authors: | Fan Qiang Lü Xiao-De Zhang Ping Xu Meng |
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| Affiliation: | Institute of Electronics, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | In the system of Displaced Phase Centre Multiple Azimuth Beams (DPCMAB) of spaceborne SAR, the transmitter blinding and nadir echo eclipsing events can lead to nonuniform azimuth sampling that results in the appearance of unexpected peaks on the both sides of mainlobe of azimuth impulse response. In this paper, the Spectral-Fit method and the reconstruction in time domain method are adopted to eliminate the effect due to azimuth nonuniform sampling with the quality of image being unaffected. Contrasting the number of arithmetic operations of the above two methods, it is shown that the reconstruction in time domain method is superior to the Spectral-Fit method. |
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| Keywords: | Spaceborne SAR DPCMAB Nonuniform azimuth sampling Spectral-Fit method Reconstruction in time domain method |
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