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Method of Detecting a Target Enveloped by a Plasma Sheath Based on Doppler Frequency Compensation

机译:基于多普勒频率补偿检测由等离子体护套封闭的目标的方法

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The high velocity of the re-entry object causes its surface to be enveloped with a plasma sheath. In the process of target detection of re-entry objects, the plasma sheath with fluid characteristics results in multiple reflected signals in the radar echo. Multiple targets appear in the 1-D range profile following pulse compression processing of a multicomponent echo signal. We refer to targets different from the real target as interference targets. The appearance of interference targets seriously affects the radar detection of re-entry objects, resulting in positioning failure or even tracking loss. In this article, by establishing the physical model of radar echo with multiple reference points and multiple velocity parameters of the re-entry object under plasma sheath, the multitarget phenomenon of the re-entry target echo signal on the 1-D range profile is simulated. A target detection method based on Doppler frequency compensation and nonuniform plasma sheath reflection model is proposed, which can effectively suppress false targets and realize reliable detection of targets under plasma sheath. The feasibility of detecting a target enveloped by a plasma sheath is verified by simulation, laying the foundation for the precise detection and tracking of targets.
机译:重新入口对象的高速使其表面与等离子护套封闭。在重新进入对象的目​​标检测过程中,具有流体特性的等离子体护套导致雷达回波中的多个反射信号。多个目标出现在多组分回波信号的脉冲压缩处理之后的1-D范围轮廓中。我们指的是与真实目标不同的目标是干扰目标。干扰目标的外观严重影响重新入口对象的雷达检测,导致定位失败甚至跟踪损耗。在本文中,通过在等离子体护套下建立具有多个参考点和重新入口对象的多个速度参数的雷达回波的物理模型,模拟了1-D范围分布上的重新进入目标回波信号的多靶数现象。提出了一种基于多普勒频率补偿和非均匀等离子体护套反射模型的目标检测方法,其能够有效地抑制了诸如等离子体护套下靶的可靠性检测。通过模拟验证检测由等离子体护套封闭的目标的可行性,奠定了精确的检测和靶标的基础。

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