Title :
Oscillator based complex adaptive notch filters
Author :
Nishimura, S. ; Mvuma, Aloys ; Hinamoto, Takao
Author_Institution :
Shimane Univ., Matsue, Japan
Abstract :
In this paper, a new complex adaptive notch filters using the oscillator based algorithm has been proposed. The approach presented for second-order real coefficient IIR filters has been applied to derive a coefficient-update algorithm for a first-order complex adaptive notch filter. Convergence characteristics of the proposed algorithm have been analyzed. Unbiased frequency estimation of a complex sinusoid has been achieved by thinning the notch bandwidth. Computer simulations show the effectiveness of the proposed algorithm.
Keywords :
IIR filters; adaptive filters; frequency estimation; notch filters; oscillators; IIR filters; coefficient-update algorithm; complex adaptive notch filters; frequency estimation; oscillator based algorithm; Adaptive filters; Bandwidth; Convergence; Filtering algorithms; Frequency estimation; IIR filters; Oscillators;
Conference_Titel :
Circuits and Systems (MWSCAS), 2014 IEEE 57th International Midwest Symposium on
Conference_Location :
College Station, TX
Print_ISBN :
978-1-4799-4134-6
DOI :
10.1109/MWSCAS.2014.6908510
