Title :
Analysis of Online Secondary-Path Modeling With Auxiliary Noise Scaled by Residual Noise Signal
Author :
Liu, Jian ; Xiao, Yegui ; Sun, Jinwei ; Xu, Li
Author_Institution :
Dept. of Autom. Testing & Control, Harbin Inst. of Technol., Harbin, China
Abstract :
Online secondary-path modeling of active noise control (ANC) systems may be effectively implemented by injecting an auxiliary white noise whose magnitude is scaled by a function of residual noise signal. In this paper, a filtered-X LMS (FXLMS) based narrowband ANC system is analyzed, whose online secondary-path modeling is based on the use of an auxiliary white noise scaled by one-sample-delayed residual noise signal. Difference equations governing the dynamics of the entire system and closed-form expressions for steady-state mean-square errors (MSE) as well as the residual noise power are derived and discussed in detail. Extensive simulations are conducted to confirm the validity of the analytical findings.
Keywords :
acoustic signal processing; active noise control; difference equations; mean square error methods; ANC online secondary path modeling; FXLMS; active noise control; auxiliary white noise; difference equations; filtered-X LMS; mean square errors; residual noise signal; Active noise reduction; Closed-form solution; Control system synthesis; Difference equations; Least squares approximation; Narrowband; Power system modeling; Signal analysis; Steady-state; White noise; Auxiliary noise; filtered-X LMS (FXLMS); narrowband active noise control; online secondary-path modeling; performance analysis;
Journal_Title :
Audio, Speech, and Language Processing, IEEE Transactions on
DOI :
10.1109/TASL.2010.2040789
