自旋尾翼弹头的双基地微多普勒研究

微动特征是弹道中段目标雷达识别的有效特征之一。针对基于自旋尾翼弹头的双基地微多普勒的自旋和结构参数估计问题，该文首先建立了自旋尾翼弹头双基地散射中心的微多普勒模型，然后利用FEKO计算了尾翼弹头的双基地散射系数，通过对散射系数序列的时频分析，验证了模型的正确性，同时总结了自旋尾翼弹头的双基地微多普勒特性，再分析了估计自旋和结构参数的可行性，最后，由于闪烁效应导致Hough变换已不能有效估计参数，该文提出了利用闪烁效应估计参数的新思路。

Bistatic Micro-Doppler of the Spinning Warhead with Fins

Micro-motion feature is one of the effective features used for radar target recognition in the middle section of the ballistic curve.To solve the problem of estimating spinning and structural parameters based on the micro-Doppler of the spinning warhead with fins in bistatic radar,the micro-Doppler models of the scattering centers at the edge of fins and the conjunction of the fins and the body of warhead are derived when the warhead is spinning firstly.Then the bistatic scattering coefficients of the warhead model are calculated by using FEKO.The micro-Doppler models are verified from the time frequency analysis on the bistatic scattering coefficients,and the characteristics of the micro-Doppler are summarized.Thirdly,the feasibility of extracting spinning and structural parameters in bistatic radar is analysed.Finally,because Hough transform can not estimate the parameters because of the flashes,a new idea to extract the parameters using the flashes is proposed.