非相干散射雷达探测回波信号快速提取仿真

发布时间：2018-08-09 13:20

【摘要】：非相干散射雷达可以对多种电离层等离子体重要参数进行测量,但回波信号极其微弱,为了提取到有效的电离层参数,现代非相干散射雷达采用了复杂的编码方案,导致雷达回波信号分析提取变得非常困难。针对这一问题,提出了采用雷达模糊函数理论来改善雷达编码信号的分析。交替码是现代非相干散射雷达常用的一种编码方式。结合非相干散射信号探测基本原理及模糊函数理论,对交替码的模糊函数进行了仿真研究。分析了码形在编码方式,距离分辨率及信息含量方面的优缺点,并对交替码的波形处理进行了研究。仿真结果表明,交替码编码方式复杂,信息含量大并具有较高的距离分辨率,抗噪性强,适用于变化较快的电离层偶发E层。
[Abstract]:Incoherent scattering radar can measure the important parameters of ionospheric plasma, but the echo signal is very weak. In order to extract effective ionospheric parameters, modern incoherent scattering radar adopts complex coding scheme. It is very difficult to analyze and extract radar echo signal. To solve this problem, the theory of radar ambiguity function is proposed to improve the analysis of radar coded signals. Alternating code is a common coding method in modern incoherent scattering radar. Combined with the basic principle of incoherent scattering signal detection and fuzzy function theory, the ambiguity function of alternating code is simulated. The advantages and disadvantages of code form in coding mode, distance resolution and information content are analyzed, and the waveform processing of alternating code is studied. The simulation results show that the coding method of alternating code is complex, the information content is high, the range resolution is high, the noise resistance is strong, and it is suitable for the ionospheric occasional E layer which changes rapidly.
【作者单位】：南昌大学信息工程学院;南昌大学空间科学与技术研究院;
【分类号】：TN957.51

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