Time-Frequency Analysis for Complex Time-Varying Signals Based on Wigner-Ville Distribution ( 1.Key Laboratory of Geo-Exploration and Instrumentation ,Ministry of Education,Changchun,Jilin 130061,China; 2.College of Instrumentation and Electrical Engineering,Jilin University,Changchun,Jilin 130061,China; 3.Collectivity Department of Chinese Weapon Industry System,Beijing 100089,China)

WANG Zhong-ren; LIN Jun; LI Wen-wei

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Time-Frequency Analysis for Complex Time-Varying Signals Based on Wigner-Ville Distribution ( 1.Key Laboratory of Geo-Exploration and Instrumentation ,Ministry of Education,Changchun,Jilin 130061,China; 2.College of Instrumentation and Electrical Engineering,Jilin University,Changchun,Jilin 130061,China; 3.Collectivity Department of Chinese Weapon Industry System,Beijing 100089,China)

更新时间：2025-07-16

- Time-Frequency Analysis for Complex Time-Varying Signals Based on Wigner-Ville Distribution ( 1.Key Laboratory of Geo-Exploration and Instrumentation ,Ministry of Education,Changchun,Jilin 130061,China; 2.College of Instrumentation and Electrical Engineering,Jilin University,Changchun,Jilin 130061,China; 3.Collectivity Department of Chinese Weapon Industry System,Beijing 100089,China)
- Acta Electronica Sinica Vol. 33, Issue 12, Pages: 2239-2241(2005)
- 作者机构：
  
  1. 地球信息探测仪器教育部重点实验室,吉林,长春,130061
  2. 吉林大学仪器科学与电气工程学院,吉林,长春,130061
  3. 中国兵器工业系统总体部,北京,100089
  4. 地球信息探测仪器教育部重点实验室吉林长春,130061
  5. 吉林大学仪器科学与电气工程学院吉林长春,130061
  6. 中国兵器工业系统总体部北京,100089
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN911.7
- Published：2005
- 稿件说明：
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WANG Zhong-ren, LIN Jun, LI Wen-wei. Time-Frequency Analysis for Complex Time-Varying Signals Based on Wigner-Ville Distribution ( 1.Key Laboratory of Geo-Exploration and Instrumentation ,Ministry of Education,Changchun,Jilin 130061,China; 2.College of Instrumentation and Electrical Engineering,Jilin University,Changchun,Jilin 130061,China; 3.Collectivity Department of Chinese Weapon Industry System,Beijing 100089,China)[J]. Acta Electronica Sinica, 2005, 33(12): 2239-2241.
DOI：

WANG Zhong-ren, LIN Jun, LI Wen-wei. Time-Frequency Analysis for Complex Time-Varying Signals Based on Wigner-Ville Distribution ( 1.Key Laboratory of Geo-Exploration and Instrumentation ,Ministry of Education,Changchun,Jilin 130061,China; 2.College of Instrumentation and Electrical Engineering,Jilin University,Changchun,Jilin 130061,China; 3.Collectivity Department of Chinese Weapon Industry System,Beijing 100089,China)[J]. Acta Electronica Sinica, 2005, 33(12): 2239-2241. DOI：

摘要

对多分量线性调频(LFM)信号、单分量非线性调频(NLFM)信号以及多分量NLFM信号的Wigner-Ville分布进行了数值计算

探讨了信号项与交叉项之间的差异性特征

提出了信号时频曲线中点集的概念

研究了交叉项出现的一般规律.对于多分量信号

交叉项出现在信号项时频曲线之间的中点集之内.对于单分量NLFM信号

也有交叉项产生

交叉项出现在信号项时频曲线自身的自中点集之内.

Abstract

Wigner-Ville distributions are implemented for a multicomponent linear frequency modulation (LFM) signal

a single component nonlinear frequency modulation (NLFM) signal

and a multicomponent NLFM signal.Different characteristics between signal items and crossed items are discussed.A concept of midpoint set of time-frequency curves is presented.A general law for crossed item appearing is studied.In time-frequency plane

the images of signal items are smooth continuous curves

but the images of crossed items are pinto interference patter ns.For a multicomponent signal

crossed items appear in midpoint set of the signal time-frequency curves.A single component NLFM signal can also produce crossed item

and it appears in self-midpoint set of the signal time-frequency curve itself.

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