Frequency detection using Pade approximation

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The current paper describes an application of Pade approximation to obtain a frequency detection method similar to (and, in a sense, more general than) linear prediction. While generally not applicable for spectrum estimation, the described method is in many cases more precise in finding the frequencies of a harmonic signal. A great number of numerical tests were performed for comparing frequency detection performance of the method under consideration and of linear prediction. Their methodology and results are summarized in the article.