干涉式微波辐射计成像算法以及天线阵采样方案分析
Imaging Algorithm and Antenna Array of Interferometric Microwave Radiometer
查看参考文献15篇
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文摘
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对旋转扫描干涉式微渡辐射计成像算法进行研究，提出了基于伪极网格傅立叶变换的成像算法，利用一维插值以及一维FFT即可实现图像重建，既提高了成像精度，又保证了成像速度。以3种8单元天线排列方案阵为例，利用本文方法和基于线性插值的笛卡儿网格方法分别进行成像模拟，模拟结果验证了本文方法的优越性，同时表明天线阵排列方案对成像结果影响很大，天线阵基线均匀性越好，数量越多，成像质量就越好。直线阵无法实现基线数量与均匀性的统一，而平面阵可以在较好均匀性情况下实现最多的基线数，是天线阵排列的首选方案。 |
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其他语种文摘
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The imaging theory of rotary scanning synthetic aperture microwave radiometer is studied, and a new imaging algorithm based on pseudo-polar FFT is developed. The critical feature of the algorithm is that it involves only 1-D equispaced FFT and 1-D interpolation, so it is more fast and accurate for application. In order to validate this new algorithm and analyze the antenna array effects on image reconstruction, the imaging of three typical designs of 8 elements antenna array is simulated by the pseudo-polar FFT method and linear interpolation based Cartesian FFT method. The results illustrate the superior performance of the new method and also indicate that the baseline＇s uniformity and number have a great influence on the reconstruction, and the plane distributed antenna array is preferred rather than the linear distributed array for it has more baselines and good uniformity simultaneously. |
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来源
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遥感技术与应用
,2007,22(2):135-140 【核心库】
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关键词
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干涉式微波辐射计
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被动微波成像
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伪极网格FFT
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天线阵列
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地址
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中国科学院空间科学与应用研究中心, 北京, 100080
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1004-0323 |
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学科
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自动化技术、计算机技术 |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:2884121
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参考文献 共
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