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This paper proposes a wavelet-based approach for frequency estimation of the source of interference in a PCB. The frequency constitutes a relevant information that characterizes the disturbance signal and may lead to the identification of its source. The estimation procedure is only based on the disturbed signal, already available, from which the interference signal is reconstructed by performing a wavelet decomposition at level one. The estimated interference is then appropriately processed to determine its frequency.

A wavelet-based approach for frequency estimation of interference signals in printed circuit boards