Title :
A study on cascaded adaptive notch filter utilizing allpass filter and adaptive line enhancer
Author :
Shiogai, Kazuki ; Sasaoka, Naoto ; Itoh, Yoshio ; Kinugasa, Yasutomo ; Ohe, T. ; Kobayashi, Masato
Author_Institution :
Grad. Sch. of Eng., Tottori Univ., Tottori, Japan
Abstract :
A cascaded second order adaptive notch filter using an allpass filter has been proposed. A gradient based algorithm for the adaptive notch filters are used. However, the performance of the adaptive notch filter is decreased due to disturbance which inputs into a tap input signal. In this paper, in order to solve the problem, an adaptive line enhancer which reduces the disturbance in a reference signal is introduced to the adaptive notch filter. Finally, computer simulation results are presented to confirm the convergence characteristics.
Keywords :
adaptive filters; all-pass filters; convergence; gradient methods; notch filters; adaptive line enhancer; all-pass filter; cascaded second order adaptive notch filter performance; computer simulation; convergence characteristics; gradient-based algorithm; reference signal disturbance; tap input signal; Adaptive algorithms; Adaptive filters; Broadband communication; Convergence; Filtering algorithms; IIR filters; Line enhancers; adaptive line enhancer; adaptive notch filter; allpass filter; bias;
Conference_Titel :
Electronics and Telecommunications (ISETC), 2012 10th International Symposium on
Conference_Location :
Timisoara
Print_ISBN :
978-1-4673-1177-9
DOI :
10.1109/ISETC.2012.6408101
