Instantaneous frequency estimation and automatic time-varying filtering

Abstract

An automatic time-varying filter design technique is presented, based on windowing in the time-frequency plane about the IF of the signal under analysis, followed by signal synthesis using the Wigner-Ville distribution. The choice of the IF estimation algorithm determines the performance of the method. Algorithms for IF estimation are presented, and their performance in additive noise is discussed. The method is applicable to automatic filtering of FM signals. A review is presented of the various approaches followed by the authors and others.