基于连续太赫兹波频谱信息提取方法研究  

Research on the method of extracting spectral information based on continuous Terahertz waves

作　　者：毕建敏 陈友兴[1] 薛凯亮 李泽宙 Bi Jianmin;Chen Youxing;Xue Kailiang;Li Zezhou(School of Information and Communication Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学信息与通信工程学院,太原030051

出　　处：《电子测量技术》2024年第14期64-71,共8页Electronic Measurement Technology

基　　金：山西省自然科学基金(202203021221118)项目资助。

摘　　要：调频连续太赫兹系统受激励器件限制导致其带宽普遍较窄,在检测样件时由于单点处数据量有限,存在不易提取特征信号的问题,针对此问题,本文提出了一种基于Kaiser窗的线性调频z变换算法。首先对原始信号进行加窗处理,采用线性调频z变换对不同样件中深度缺陷特征信号进行提取,引入不同信号处理方法进行比较分析,结果可得本文提出方法在有限的数据量中保留样件特征信息的同时,降低了计算复杂度,通过与不同种复合材料检测数据处理对比,证明了该方法的有效性与普适性。FM continuous terahertz wave system is limited by the excitation device,resulting in a generally narrow bandwidth,in the detection of samples due to the limited amount of data at a single point,there is not easy to extract the feature signal,to address this problem,this paper proposes a chirp-z transform algorithm based on the Kaiser window.First of all,the original signal is processed by adding windows,and the linear frequency modulated ztransform is used to extract the feature signals of the depth defects in different samples,and different signal processing methods are introduced for comparative analysis,and the results show that the method proposed in this paper reduces the computational complexity while retaining the feature information of the samples in the limited amount of data,comparing with different kinds of composite material detection data processing,which proves the validity and universality of the method.

关 键 词：太赫兹波 FMCW CZT KAISER窗 信息提取 

分 类 号：TN911[电子电信—通信与信息系统] TN526[电子电信—信息与通信工程]