Computer Engineering and Applications ›› 2008, Vol. 44 ›› Issue (28): 9-12.DOI: 10.3778/j.issn.1002-8331.2008.28.003

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Novel Modified Gabor Spectrum method

GUO Yong-ming,SHUI Peng-lang   

  1. National Laboratory of Radar Signal Processing,Xidian University,Xi’an 710071,China
  • Received:2008-06-13 Revised:2008-07-08 Online:2008-10-01 Published:2008-10-01
  • Contact: GUO Yong-ming



  1. 西安电子科技大学 雷达信号处理国家重点实验室,西安 710071
  • 通讯作者: 郭永明

Abstract: A novel Modified Gabor Spectrum(MGS) method is proposed.Restricting the auto-term supports of MGS on the supports of Gabor coefficients,a good Time-Frequency Representation(TFR) is obtained.Compared with the method of Gabor Spectrum(GS),the MGS has three merits.First,computation cost is reduced greatly.Second,the cross-terms are removed effectively and simultaneously the auto-terms are almost unchanged.Thirdly,the resolution and concentration of time-frequency are improved by high order operation.Compared with the methods of GS and AOK,experimental results show better TFR performance of the MGS.

摘要: 提出了一种修正Gabor谱图的新方法,即通过限制Gabor谱图(GS)的自项支撑区域在Gabor系数所估计的支撑区域,获得了很好的时频表示(TFR)。该方法与GS的方法相比主要具有三个方面的优点:首先,减少了运算量;其次,在尽量保持信号各分量的自项不变的同时,有效去除了交叉项;第三,通过增加计算阶数,提高了时频分辨力和聚集性,克服了GS随着阶数的增加而产生严重的交叉项的缺点。实验结果表明,该方法优于GS的方法,同时与自适应最优核(AOK)的方法相比,也达到了较好的TFR结果。