| 基于时频分析的电离层回波多普勒效应分析 |
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| 引用本文： | 李琼,董文锋,洪亮,潘英锋.基于时频分析的电离层回波多普勒效应分析[J].空军雷达学院学报,2011,25(3):160-163. |
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| 作者姓名： | 李琼 董文锋 洪亮 潘英锋 |
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| 作者单位： | 空军雷达学院五系,武汉,430019 |
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| 摘 要： | 针对电离层的非平稳性,通过研究电离层多普勒效应随时间的变化情况,可以反映出电离层的变化.利用Wigner-Ville分布(WVD)、伪Wigner-Ville分布(PWD)、重排伪Wigner-Ville分布(MSPWD)、Choi-Williams分布4种时频分析方法对实际电离层斜向返回探测系统的回波信号进行了分析和处理.研究结果表明,重排伪Wigner-Ville分布对信号的处理效果最好.
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| 关 键 词： | 电离层斜向返回探测 多普勒频率 时频分析 |
Approach to Ionosphere Echo Doppler Effect Based on Time-Frequency Analysis |
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| LI Qiong,DONG Wen-feng,HONG Liang,PAN Ying-feng.Approach to Ionosphere Echo Doppler Effect Based on Time-Frequency Analysis[J].Journal of Air Force Radar Academy,2011,25(3):160-163. |
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| Authors: | LI Qiong DONG Wen-feng HONG Liang PAN Ying-feng |
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| Affiliation: | LI Qiong,DONG Wen-feng,HONG Liang,PAN Ying-feng(No.5 Department,AFRA,Wuhan 430019,China) |
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| Abstract: | The change of the ionosphere can be reflected by studying its Doppler effect varying with time in terms of its nonstationarity.In this paper,the echo signals of the oblique backscattering sounding system are analyzed and processed by using the four types of time-frequency analysis,such as Wigner-Ville distribution(WVD),pseudo-Wigner-Ville distribution(PWD),modified smoothing pseudo-Wigner-Ville distribution(MSPWD) and Choi-Williams distribution approaches.The findings indicate that the processing effect usi... |
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| Keywords: | ionospheric oblique backscattering sounding Doppler frequency time-frequency analysis |
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