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

fYear

2012

fDate

15-16 Nov. 2012

Firstpage

295

Lastpage

298

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics and Telecommunications (ISETC), 2012 10th International Symposium on

Conference_Location

Timisoara

Print_ISBN

978-1-4673-1177-9

Type

conf

DOI

10.1109/ISETC.2012.6408101

Filename

6408101