A new technique to reduce cross terms in the Wigner distribution

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• 作者：Ram Bilas Pachori ; Pradip Sircar
• 关键词：Fourier– ; Bessel expansion ; Multicomponent nonstationary signals ; Time-frequency representation ; Wigner distribution
• 刊名：Digital Signal Processing
• 出版年：2007
• 出版时间：March 2007
• 年：2007
• 卷：17
• 期：2
• 页码：466-474
• 全文大小：788 K

文摘

A new method for time-frequency representation (TFR) of a signal, which combines the Fourier–Bessel (FB) expansion and the Wigner–Ville distribution (WVD) has been presented in this paper. The FB expansion decomposes a multicomponent signal into a number of monocomponent signals, and then the WVD technique is applied on each component of the composite signal to analyze its time-frequency distribution (TFD). The simulation results show that the proposed technique based on the FB decomposition is a powerful tool for analyzing multicomponent nonstationary signals and for obtaining the TFR of the signal without introducing cross terms.