阵列式探地雷达信号极化场特征

doi:10.13278/j.cnki.jjuese.201702307

吉林大学学报(地球科学版) ›› 2017, Vol. 47 ›› Issue (2): 633-644.doi: 10.13278/j.cnki.jjuese.201702307

• 地球探测与信息技术 • 上一篇

阵列式探地雷达信号极化场特征

习建军^1,2, 曾昭发¹, 黄玲³, 崔丹丹², 王者江¹

1. 吉林大学地球探测科学与技术学院, 长春 130026;
2. 河北省电力勘测设计研究院, 石家庄 050031;
3. 中国科学院电子学研究所, 北京 100190

收稿日期:2016-12-19 出版日期:2017-03-26 发布日期:2017-03-26
作者简介:习建军(1982),男,高级工程师,博士,主要从事工程物探及电力勘测方面的研究,E-mail:tiantianhappy365@126.com
基金资助:
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）

Characteristics of the Signal Polarization Field in Array Type Ground Penetrating Radar

Xi Jianjun^1,2, Zeng Zhaofa¹, Huang Ling³, Cui Dandan², Wang Zhejiang¹

1. College of GeoExploration Science and Technology, Jilin University, Changchun 130026, China;
2. Heibei Electric Power Design & Research Institute, Shijiazhuang 050031, China;
3. Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China

Received:2016-12-19 Online:2017-03-26 Published:2017-03-26
Supported by:
Supported by the National Natural Science Foundation of China (40774055, 41174097, 41574097) and the Specialized Research Fund for the Doctoral Program of Higher Education of China (20130061110060)

摘要/Abstract

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。

关键词: 阵列天线, MIMO探地雷达, 稳定性, 信噪比, 散射截面闪烁

Abstract: With the trend of the detection method using array observation, the GPR(ground penetrating radar) system takes the response characteristic analysis for the isomorphic multisource concurrent underground target as the basis and precondition for the system development and data processing. The multisource concurrent signal and target echo signal of the array antenna with complicated polarization characteristics, contain more response message about the target characteristics. Aiming at the plane wave like MIMO(multiple-input multiple-output) GPR system, this paper analyzes the response characteristics of the target in polarization plane wave illumination and the morphological characteristics of the model underground target through its multi-polarization signal. The surface projection distribution of the target is acquired through the integration along time axis of the data received by the array antenna, and the targets of the transmit-receive array antenna in 1-D and 2-D distribution are detected and analyzed by the time domain finite-difference forward modeling method. The research results that multi-polarization integrated characteristic analysis can improve effectively the consistency of the target detection, promote the signal to noise ratio (SNR) of the target response signal, abate the influence from the antenna pattern and target scattering cross-section blink upon the data section, and decrease the difficulty in data processing and interpretation.

Key words: array antenna, MIMO GPR, stability, signal to noise ratio, scattering cross-section blink

中图分类号:

P631.3

习建军, 曾昭发, 黄玲, 崔丹丹, 王者江. 阵列式探地雷达信号极化场特征[J]. 吉林大学学报(地球科学版), 2017, 47(2): 633-644.

Xi Jianjun, Zeng Zhaofa, Huang Ling, Cui Dandan, Wang Zhejiang. Characteristics of the Signal Polarization Field in Array Type Ground Penetrating Radar[J]. Journal of Jilin University(Earth Science Edition), 2017, 47(2): 633-644.

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阵列式探地雷达信号极化场特征

Characteristics of the Signal Polarization Field in Array Type Ground Penetrating Radar

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