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基于Hough变换的任意时频分布线条特征提取
引用本文:张子瑜,吴镇扬,李想,任永川.基于Hough变换的任意时频分布线条特征提取[J].电子学报,2001,29(4):433-435.
作者姓名:张子瑜  吴镇扬  李想  任永川
作者单位:东南大学无线电工程系,南京 210096
基金项目:国家自然科学基金! (No .69871 0 0 9)
摘    要:时频分布将时(空)域信号变换到时频联合域,揭示出信号的非平稳性、瞬时频率以及频率随时(空)间的变化演进,这其中往往主要含有线条成分,现有的分析方法只能探测直线成分(即线性调频参数),并且只是分析Wigner分布.本文进行两方面的推广,一方面将Hough变换探测各种参数曲线,可以对任意时频模式的信号进行检测;另一方面推广到任意时频分布,试验结果表明本文方法对于低信噪比的信号,检测可靠性更高,尤其对于自适应时频分布,效果更为满意.

关 键 词:时频分布  Hough变换  分数傅里叶变换  Rodon-Wigner变换  FRFT  
文章编号:0372-2112 (2001) 04-0433-03
收稿时间:1999-11-18

Hough Transform Based Time-Frequency Representation Curve Character Extraction
ZHANG Zi-yu,WU Zhen-yang,LI Xiang,REN Yong-chuan.Hough Transform Based Time-Frequency Representation Curve Character Extraction[J].Acta Electronica Sinica,2001,29(4):433-435.
Authors:ZHANG Zi-yu  WU Zhen-yang  LI Xiang  REN Yong-chuan
Affiliation:Department of Radio Engineering,Southeast University,Nanjing 210096,China
Abstract:The time-frequency analysis can transform the time domain signal into time-frequency domain,and reveal the law of frequency varying with time.In the time-frequency representation,there are many curves,Present methods can only detect line and only be applied on Wigner time-frequency distribution.In this paper we extend in two directions:firstly we extend to apply on arbitrary time-frequency distribution,secondly we extend to detect any kind of curves in time-frequency distribution.Numeric experimentation show that this method can detect curves more robustly for low SNR signals especially applied on adaptive time-frequency distribution.
Keywords:time-frequency distribution  Hough transform  Rodon-Wigner transform  FRFT
本文献已被 CNKI 维普 万方数据 等数据库收录!
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