基于分形结构的植被高阶相干散射模型研究

doi:10.11999/JEIT160095

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Abstract

At low frequency, the assumption of independent scattering of the scatterers in vegetation medium is no longer valid. The coherent effect and near field interactions should be considered. In this paper, a high-order coherent scattering model for vegetation with fractal structure is presented. The fractal theory is employed to generate a realistic 3-D spatial structure of vegetation. The near field interaction between scatterers is formulated using an efficient algorithm based on the reciprocity theorem. For the coherent effect, every scatterer with a deterministic location is taken into account. The main scattering mechanisms are defined in the way of layered vegetation model, allowing better understanding of microwave interaction with trunk-crown structure. Good agreements are obtained from the comparisons of the theoretical predictions with the multifrequency and multipolarization measurement results of boreal forest. Through an extensive ground truth, theoretical analysis of the contribution of the scattering mechanisms for various frequencies, incident angles and vegetation structures is carried out. It is found that under specified conditions the vegetation scattering model can be simplified according to the main contribution scattering mechanism which can be applied to the inversion issue.

Key words： Vegetation Fractal structures Coherent effect Near field interaction Backscattering.

Received: 21 January 2016 Published: 01 September 2016

PACS:

TP722.6

Fund:

The National Natural Science Foundation of China (61172017)

Corresponding Authors: ZHANG Xiaojuan E-mail: xjzhang@mail.ie.ac.cn

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	RAO Liting
	ZHANG Xiaojuan
	WANG Youcheng
	FANG Guangyou

Cite this article:

RAO Liting,ZHANG Xiaojuan,WANG Youcheng等. High-order Coherent Scattering Model for Vegetation with Fractal Structures[J]. JEIT, 2016, 38(10): 2502-2508.

URL:

http://jeit.ie.ac.cn/EN/10.11999/JEIT160095 OR http://jeit.ie.ac.cn/EN/Y2016/V38/I10/2502

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