%0 Journal Article
%T A New Method to Suppress Cross-Terms of WVD via Thresholding Superimposition of Multiple Spectrograms<br>基于多谱图叠加阈值的抑制WVD交叉项的新方法
%A Li Yu-qing
%A Shui Peng-lang
%A Lin Ying
%A <br>李雨青
%A 水鹏朗
%A 林 英
%J 电子与信息学报
%D 2006
%I 
%X In this paper, a new method is proposed to suppress the cross-terms of Wigner-Ville Distribution (WVD), which is based on thresholding the superimposition of multiple spectrograms. First, the spectrograms with different time-frequency resolutions are superimposed and then the superimposition is thresholded to localize the auto-term support region of the WVD. Secondly, the WVD is multiplied by the indication function of the region. In this way, a new Time-Frequency Distribution (TFD) is obtained. Unlike the traditional kernel function methods to suppress cross terms, our method not only reduces the interfering cross-terms but also preserves the superb time-frequency concentration of the WVD. The experimental results show that the method is very effective for both the multicomponent signals consisted of the LFM’s and nonlinear frequency modulation chirp signals.
%K Wigner-Ville Distribution(WVD)
%K Spectrogram
%K Cross-terms
%K Auto-terms
%K Thresholding<br>Wigner-Ville分布
%K 谱图
%K 交叉项
%K 自项
%K 阈值处理
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=D30B5BD1CE4C5BF4&yid=37904DC365DD7266&vid=D3E34374A0D77D7F&iid=5D311CA918CA9A03&sid=F91C9B147A9ECBD0&eid=5A66347DEC1DE6F4&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=3&reference_num=8