摘要
本文在对高分辨线性时频分析方法理论及仿真研究的基础上,使用该方法对高频电离层返回散射探测的单个传播模式和多个传播模式的实测数据进行解污染处理,结果显示该方法取得了较理想的电离层污染抑制效果,尤其针对电离层多模和相位污染同时存在的复杂情况,比其它方法具有更高的频谱锐化度。因此证明该方法具有很高的工程应用价值,对天波超视距雷达舰船等低速目标检测具有重要意义。
The high resolution time-frequency method has carried on the theoretical analysis and simulation study in this paper. And this method was applied to high frequency ionospheric back-scattering detection data that have ionospheric single mode propagation state and multimode propagation state. Results show that this method has better effect,especially for the case of ionospheric multi-mode propagation state,and phase contamination exist at the same time,this method can make spectrum more sharpening than other methods. Thus proves that the method has high engineering application value. For sky-wave over-the-horizon radar（ OTHR） detection of low speed targets like ships,the method is of great significance.
出处
《中国电子科学研究院学报》
北大核心
2016年第1期88-93,共6页
Journal of China Academy of Electronics and Information Technology
基金
国家自然科学基金项目(61302006)
国家自然科学基金项目(61331012)
关键词
电离层
多模传播
返回散射探测
改进协方差
ionosphere
multi-mode propagation
back-scattering detection
modified covariance
