CAJ | 학술논문

雷达目标部件的旋转运动引起的微多普勒效应为目标精确识别提供了新的技术途径，近年来获得了广泛研究。该文以含旋转部件目标为例，提出一种基于高阶矩函数的宽带雷达微动特征快速提取方法。首先对经参考信号共轭相乘后的旋转散射点回波信号进行了分析，并得到了其关于不同快时间及慢时间的高阶矩函数，然后，通过检测该函数虚部傅里叶变换累积结果的峰值位置，实现了目标部件微动特征的快速提取。仿真实验验证了该方法的有效性。
뢰체목표부건적선전운동인기적미다보륵효응위목표정학식별제공료신적기술도경，근년래획득료엄범연구。해문이함선전부건목표위례，제출일충기우고계구함수적관대뢰체미동특정쾌속제취방법。수선대경삼고신호공액상승후적선전산사점회파신호진행료분석，병득도료기관우불동쾌시간급만시간적고계구함수，연후，통과검측해함수허부부리협변환루적결과적봉치위치，실현료목표부건미동특정적쾌속제취。방진실험험증료해방법적유효성。
The micro-Doppler effect induced by the rotating parts of the target, which provides a new approach for accurate auto radar target recognition, attracts great research attention in recent years. In this paper, taking target with rotating parts for an example, a method for micro-motion signature extraction based on high-order moment function is proposed, which is suitable for the wideband radar. Firstly, the echo induced by the rotating parts is analyzed by multiplying with the conjugate of the reference signal, and its high-order moments are calculated respect to the fast time and the slow time. Then the micro-motion signature is quickly obtained by detecting the peak value of the products of the Fourier transform results of its moments’ imaginary parts with different time delays. A computer simulation is given to illustrate the effectiveness of the proposed method.