Title :
Analysis of FX-LMS algorithm using a cost function to avoid nonlinearity
Author :
Hamidi, H. ; Taringoo, F. ; Nasiri, A.
Author_Institution :
Islamic Azad Univ., Tehran, Iran
Abstract :
In ANC systems in case of loudspeakers saturation the adaptive algorithm may diverge due to nonlinearity. FX-LMS algorithm is widely used for feed-forward ANC systems ; its cost function is conventionally chosen independent of control signal magnitude, and hence the control signal may increase unlimitedly. In this paper a new cost function is proposed that takes in to account the control signal power. Choosing an appropriate weight can prevent the system to be nonlinear and the region of this weight is obtained. Simulation and experimental results follow for confirmation.
Keywords :
active noise control; adaptive signal processing; control nonlinearities; feedforward; least mean squares methods; active noise control; adaptive signal processing; control signal power; cost function; feedforward system; loudspeakers saturation; Adaptive algorithm; Adaptive filters; Algorithm design and analysis; Control systems; Cost function; Finite impulse response filter; Linearity; Loudspeakers; Noise cancellation; Signal processing algorithms;
Conference_Titel :
Control Conference, 2004. 5th Asian
Conference_Location :
Melbourne, Victoria, Australia
Print_ISBN :
0-7803-8873-9
