...准奈奎斯特采样率；迭代外推；旁瓣抑制 [gap=2193]Key words: SAS; apodization; nonstandard nyquist; iterative extrapolate; sidelobe reduction ...
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外推迭代方法 extrapolated iterative method
This paper discusses generalized apodization algorithm at the nonstandard Nyquist sample rates,improves it by iterative extrapolate method,then applies it for SAS imaging processing.
本文对标准空间变迹法进行了推广,提出了非标准奈奎斯特采样率下的通用算法,然后使用迭代外推法对其进行了改进,并在聚焦式SAS的一维和二维成像处理中进行了应用,获得了较好的旁瓣抑制效果和目标成像质量的提高。
参考来源 - 合成孔径声纳聚焦成像算法研究·2,447,543篇论文数据，部分数据来源于NoteExpress
在交替迭代过程中，考虑到算法收敛较慢，一种称为向量外推的加速方法被采用。
During the alternate iteration, an acceleration method called as vector extrapolation was applied to the alternate iteration steps owing to slow convergence of the algorithm.
分析了小波双线性插值中高频外推阈值门限与重建图像峰值信噪比的变化关系，提出了峰值信噪比最大小波双线性插值迭代算法。
The variable relationship between the threshold of the extrapolation and its correspondent Peak of the Signal-to-Noise Ratio (PSNR) in the Wavelet Bi-linear Interpolation Algorithm is deeply analyzed.
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