| 电离层色散效应对线极化雷达信号的影响分析 |
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| 引用本文： | 丁宗华, 陈春. 电离层色散效应对线极化雷达信号的影响分析[J]. 电波科学学报, 2011, 26(1): 30-34. |
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| 作者姓名： | 丁宗华 陈春 |
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| 作者单位： | 1.中国电波传播研究所, 电波环境特性及模化技术重点实验室, 山东 青岛 266107;2. 中国科学院空间天气学国家重点实验室, 北京 100080 |
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| 基金项目： | 国家自然基金项目(No.40904040;61032009;60871076); 空间天气学国家重点实验室开放基金(O8262DAA4S) |
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| 摘 要： | 电离层色散导致穿过电离层传播的无线电脉冲信号畸变与失真，严重影响雷达系统对各种地面和空间目标的探测能力。考虑经过电离层传播的线极化雷达信号的相位色散和极化色散效应，参考他人工作推导了具有高斯幅度谱的发射信号与雷达接收信号的卷积包络的表达式，并分析计算了不同频率和相对带宽下接收包络的脉冲宽度和距离分辨率。结果表明：电离层色散效应随相对带宽的增加而增强，随雷达载频增大而减弱。对600 MHz以上载频，极化色散很弱；对100 MHz左右的载频信号，极化色散效应很明显，且强于常见的相位色散。相位色散对100 MHz~30 GHz的雷达信号都有明显影响。
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| 关 键 词： | 电离层 雷达 相位色散 极化色散 |
| 收稿时间： | 2010-01-31 |
Preliminary analysis of the ionospheric dispersion effect on linear polarization radar signal |
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| DING Zong-hua, CHEN Chun. Preliminary analysis of the ionospheric dispersion effect on linear polarization radar signal[J]. CHINESE JOURNAL OF RADIO SCIENCE, 2011, 26(1): 30-34. |
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| Authors: | DING Zong-hua CHEN Chun |
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| Affiliation: | 1.China Research Institute of Radiowave Propagation, Science and Technology on Electromagnetic environment Laboratory, Qingdao Shandong 266107, China;2. Sate Key Laboratory of Space Weather, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | Radio pulse propagated through the ionosphere is distorted by the ionospheric dispersion effect and the radar performance for probing is seriously degraded.We investigate the ionospheric phase and polarization dispersion effect on linear polarization radar signal in this paper.The convolution envelope between the transmitted and the received signal is derived.Then we make analysis and calculation about the pulse duration and range resolution under different frequency and relative bandwidth.The results show ... |
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| Keywords: | ionosphere radar phase dispersion polarization dispersion |
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