基于 Crank-Nicolson 直接分割算法的遥感问题散射特性分析

IF 3.5 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Shida Gao;Hua Jiang;Yong Fan;Yongjun Xie;Haolin Jiang;Peiyu Wu
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引用次数: 0

摘要

在遥感问题中,宽带散射研究变得比以往任何时候都更加重要。散射特性会随着范围的变化而发生显著变化。因此,传统的评估方法在很多情况下都会失效。与此同时,如何高效地模拟电磁波在大电场遥感问题中的传播也是一个迫切需要解决的问题。为了解决这些问题,我们提出了一种开放区域的 Crank-Nicolson Direct-Splitting 算法。为了无限扩展计算域,提出了具有高阶表述的卷积完全匹配层,不仅进一步增强了低频段的吸收,还减少了整个时域模拟过程中的反射。针对从近场到远场的散射特性评估,提出了有效的方法。介绍了包括地面穿透雷达和预警雷达在内的雷达遥感问题,以证明算法的有效性。通过结果可以得出结论,所提出的算法在模拟遥感问题时表现出了相当好的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Analysis of Scattering Characteristics Based on Crank-Nicolson Direct-Splitting Algorithm for Remote Sensing Problems
In remote sensing problems, broadband scattering investigation becomes increasingly important than ever before. The scattering characteristic changes significantly with the variation of range. Thus, the conventional evaluation method becomes invalid in many situations. Meanwhile, an efficient method for the simulation of electromagnetic wave propagation in electrically large remote sensing problem is also an urgently demanding. In order to alleviate such problems, an alternative Crank-Nicolson Direct-Splitting algorithm is proposed in open regions. To infinite extension of the computational domain, convolutional perfectly match layer with higher order formulation is proposed not only to further enhance the absorption at low-frequency band but also to decrease the reflections during the entire time domain simulation. Efficient method is proposed for scattering characteristics evaluation which ranges from near-field to far-field. Radar remote sensing Problems including ground penetrating radar and early warning radar are introduced to demonstrate the effectiveness of the algorithm. Through the results, it can be concluded that the proposed algorithm shows considerable performance in the simulation of remote sensing problems.
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来源期刊
CiteScore
6.50
自引率
12.50%
发文量
90
审稿时长
8 weeks
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