中段弹道目标微多普勒历程修复算法

The micro-Doppler history recovery algorithm of ballistic target in midcourse

  • 摘要: 针对由于遮挡效应导致的弹道目标微多普勒历程缺失问题,该文提出一种基于压缩感知理论的微多普勒历程修复算法。首先建立进动目标滑动散射中心模型,分析其微多普勒特性;其次,探究不同观测角度下各散射中心的有效性,分析遮挡效应对于散射中心微多普勒历程的影响;再次,根据观测到的缺失的微多普勒历程,设计压缩感知框架下的观测矩阵,采用SP(Subspace Pursuits)算法对为微多普勒历程进行修复;最后,仿真实验验证了遮挡效应对微多普勒历程的影响以及该文提出的修复算法的有效性。

     

    Abstract: Aiming at the deficiency of micro-Doppler history of ballistic target caused by shielding effects, a novel method is proposed to recover the micro-Doppler history based on Compressed Sensing theory. Firstly, the mathematic model of sliding scatters of processing target is built and the micro-Doppler characteristic is analyzed; secondly, whether the scatter is effective in different witness view is researched and the influence of shielding effects on each scatter is analyzed; next, according to the incomplete micro-Doppler history witnessed, an observation matrix in the framework of Compressed Sensing is designed and the SP(Subspace Pursuits) algorithm is applied to recover the micro-Doppler history; finally, simulation experiment shows the influence of shielding effects on the micro-Doppler history and proves the recovery algorithm is effective.

     

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