Title :
A Complex Adaptive Notch Filter
Author :
Regalia, Phillip A.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Catholic Univ. of America, Washington, DC, USA
Abstract :
A complex adaptive notch filter is developed, for tracking single-sided (a.k.a. analytic or complex) tones immersed in background noise. A complex all-pass based realization is pursued which inherits useful properties from its real counterpart: independent tuning of the notch frequency and attenuation bandwidth, easy realization of the complementary band-pass filter, unbiased frequency estimation, and faster convergence and tracking than a gradient descent algorithm.
Keywords :
adaptive filters; all-pass filters; band-pass filters; noise; notch filters; all-pass based realization; attenuation bandwidth; background noise; band-pass filter; complex adaptive notch filter; notch frequency; single-sided tones tracking; unbiased frequency estimation; Algorithm design and analysis; Band pass filters; Bandwidth; Convergence; Frequency estimation; Signal processing algorithms; Adaptive filters; chirp; frequency estimation;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2010.2075925
