Retrieval of Sinusoidal Signals by Adaptive Notch Filtering

摘要

This paper presents a method for retrieving the frequencies of sinusoidal or narrrowband signals in additive noise using a cascade implementation of a least mean square in additive noise using a cascade implementation of a least mean square Adaptive Notch Filter (ANF). The approach taken here has the advantage that the computational burden is low due to a simplified gradient computation. We present an analysis of the convergence properties and the steady state error variance of the ANF. Simulation results are presented to illustrate the operation of the ANF and verify the accuracy of the analysis. (REPRINTS)