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Communication Dans Un Congrès Année : 2008

On the concept of time-frequency distributions based on complex-lag moments

Bertrand Gottin
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  • PersonId : 854143
Cornel Ioana
Srdjan Stankovic
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  • PersonId : 854144
Ljubisa Stankovic
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  • PersonId : 854145
Jocelyn Chanussot

Résumé

The instantaneous frequency law is an important tool for the analysis of time-frequency content of a signal. Generally, the analyzed signals are composed of several time-frequency components characterized by various non-linear contents. To deal with the nonlinearity of time-frequency content, several time-frequency distributions have been proposed, mainly based on warping techniques. Recently, we introduced the time-frequency distributions based on complex-lag arguments. Its property to strongly reduce, in the case of a single component, the inner interferences due to the time-frequency non-linearity has been shown. In this paper we prove its capabilities to deal with multi-component signals. This property is achieved by an appropriate combination of complex-lag moments computed for different complex lags sets. Numerical examples prove the benefits of the concept defined in this paper.
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Dates et versions

hal-00326336 , version 1 (03-10-2008)

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  • HAL Id : hal-00326336 , version 1

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Bertrand Gottin, Cornel Ioana, Srdjan Stankovic, Ljubisa Stankovic, Jocelyn Chanussot. On the concept of time-frequency distributions based on complex-lag moments. EUSIPCO 2008 - 16th European Signal Processing Conference, Aug 2008, Lausanne, Switzerland. ⟨hal-00326336⟩
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