Modeling and reduction of SAR interferometric phase noise in the wavelet domain
Modeling and reduction of SAR interferometric phase noise in the wavelet domain
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DOI：
10.1109/tgrs.2002.806997
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发表时间：
2002-12
期刊：
影响因子：
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通讯作者：
C. López-Martínez;X. Fàbregas
中科院分区：
文献类型：
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作者：
C. López-Martínez;X. Fàbregas
研究了合成孔径雷达干涉测量中干涉相位噪声的抑制问题。介绍了一种新的复域相位噪声模型，并利用仿真和真实的干涉图进行了验证。该噪声模型也是在复小波域中导出的，其中提出了一种新的降噪算法，该算法不是基于加窗过程，也不需要相位展开。小波变换的使用允许保持滤波后的相位图像中的空间分辨率并且防止滤波低相干区域。通过使用这两个，模拟以及真实的干涉相位图像，该算法的性能，在降噪，空间分辨率的维护，和计算效率，报告和比较与其他传统的滤波方法。
This paper addresses the problem of interferometric phase noise reduction in synthetic aperture radar interferometry. A new phase noise model in the complex domain is introduced and validated by using both simulated and real interferograms. This noise model is also derived in the complex wavelet domain, where a novel noise reduction algorithm, which is not based on a windowing process and without the necessity of phase unwrapping, is addressed. The use of the wavelet transform allows to maintain the spatial resolution in the filtered phase image and prevents to filter low coherence areas. By using both, simulated as well as real interferometric phase images, the performance of this algorithm, in terms of noise reduction, spatial resolution maintenance, and computational efficiency, is reported and compared with other conventional filtering approaches.