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In this paper, we develop a general method to estimate the instantaneousfrequencies of the modes making up a multicomponent signal when the formerexhibit interference in the time-frequency plane. In particular, studying therepresentation given by the spectrogram, we show that it is possible tocharacterize the interference between the modes using the Prony method, whichenables us to build a novel instantaneous frequency estimator for the mode. Therelevance of the proposed approach is demonstrated by comparing it withdifferent stateof-the art techniques based on ridge detection.

Instantaneous Frequency Estimation in Multicomponent Signals in Case of Interference Based on the Prony Method