A New Method to Suppress Cross-Terms of WVD via Thresholding 

Superimposition of Multiple Spectrograms

Li Yu-qing; Shui Peng-lang; Lin Ying

Volume 28 Issue 8

Sep. 2010

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Article Navigation > Journal of Electronics & Information Technology > 2006 > 28(8): 1435-1438

Li Yu-qing, Shui Peng-lang, Lin Ying. A New Method to Suppress Cross-Terms of WVD via Thresholding Superimposition of Multiple Spectrograms[J]. Journal of Electronics & Information Technology, 2006, 28(8): 1435-1438.

Citation:

Li Yu-qing, Shui Peng-lang, Lin Ying. A New Method to Suppress Cross-Terms of WVD via Thresholding Superimposition of Multiple Spectrograms[J]. Journal of Electronics & Information Technology, 2006, 28(8): 1435-1438.

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A New Method to Suppress Cross-Terms of WVD via Thresholding Superimposition of Multiple Spectrograms

Li Yu-qing^{①;水鹏朗},
Shui Peng-lang,
Lin Ying

Received Date: 2004-12-16
Rev Recd Date: 2005-06-13
Publish Date: 2006-08-19

Abstract

Abstract

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 LFMs and nonlinear frequency modulation chirp signals.

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References(1)

References

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