离散光电信号的自适应重构方法  

Adaptive Signal Reconstruction Method for Discrete Electromagnetic Signals

作　　者：周向宇 彭汕林 程啸宇 ZHOU Xiangyu;PENG Shanlin;CHENG Xiaoyu(National University of Defense Technology,Changsha,China)

机构地区：[1]国防科技大学前沿交叉学科学院,长沙

出　　处：《光电技术应用》2022年第1期48-57,共10页Electro-Optic Technology Application

摘　　要：采集雷达信号数据源发射的电磁信号以后,对其进行时域至频域的变换即离散傅里叶变换、自适应幅度波束成形使得信号频率得到补偿,并对重构信号的波形进行分析和比较。通过重新定义的模型进行表征,使得可见光、红外、雷达频谱等波段数据不损失自身所携带信息情况下,减少时变时间函数和选择性积分在检测性能方面遭受大的损失。计算得到重构信号和真实信号完整的时频,说明了该方法重构后的信号呈现不同的时频特性,并有更好的能量分辨率。After the electromagnetic signal transmitted by the radar signal data source is collected, it is transformed from time domain to frequency domain, that is, discrete Fourier transform and adaptive amplitude beam forming, so that the signal frequency is compensated, and the waveforms of the reconstructed signal are analyzed and compared. Through the characterization of the redefined model, the visible light, infrared, radar spectrum and other band data do not lose their own information, so as to reduce the large loss of time-varying time function and selective integration in detection performance. The complete time-frequency representation of the reconstructed signal and the real signal shows that the reconstructed signal presents different time-frequency characteristics and has better energy resolution.

关 键 词：电磁信号处理 自适应信号重构 离散傅里叶变换 时频分析 

分 类 号：O436[机械工程—光学工程]