阵列式探地雷达信号极化场特征

发布时间：2018-03-11 17:06

本文选题：阵列天线　切入点：MIMO探地雷达　出处：《吉林大学学报(地球科学版)》2017年02期 　论文类型：期刊论文

【摘要】：阵列式观测是探地雷达系统研制和新型探测方法的一个重要发展趋势,而同形多源并发地下目标响应特征分析成为系统研制和数据处理研究的基础和前提。阵列式天线的多源并发信号及目标反射信号存在复杂的极化特性,但同时也包含更多目标特征的响应信息。本文针对基于似平面波探地雷达系统,分析了目标体在极化平面波照射下的响应特征,从多极化信号角度分析典型地下目标体形态特征;并采用时域有限差分正演分析方法,通过对阵列天线接收到的数据沿时间轴进行积分来获得目标在地表投影的分布情况,分析了一维及二维分布的收发天线阵列对目标的检测。研究成果表明,多极化综合特征分析能够有效改善目标检测的稳定性,提高目标响应信号的信噪比,减弱天线方向图和目标散射截面闪烁对数据剖面的影响,降低数据处理和解释的难度。
[Abstract]:Array observation is an important trend in the development of GPR systems and new detection methods. The analysis of the response characteristics of the homomorphic multi-source complicated underground target becomes the foundation and premise of the system development and data processing. The multi-source concurrent signal and the target reflection signal of the array antenna have complex polarization characteristics. But at the same time, it also contains more response information of target features. In this paper, the response characteristics of the target under polarized plane wave illumination are analyzed for the GPR system based on the similar plane wave. The morphological characteristics of typical underground objects are analyzed from the point of view of multi-polarization signals, and the distribution of target projection on the surface is obtained by integrating the data received by array antennas along the time axis by using the FDTD forward analysis method. In this paper, the detection of target by one dimensional and two dimensional distribution antenna array is analyzed. The results show that multipolarization synthesis characteristic analysis can effectively improve the stability of target detection and the signal-to-noise ratio of target response signal. The effect of antenna pattern and target cross section scintillation on the data profile is reduced, and the difficulty of data processing and interpretation is reduced.
【作者单位】：吉林大学地球探测科学与技术学院;河北省电力勘测设计研究院;中国科学院电子学研究所;
【基金】：国家自然科学基金项目(40774055,41174097,41574097) 高等学校博士学科点专项科研基金项目(20130061110060)~~
【分类号】：P631.3

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