Title :
Adaptive howling canceller using adaptive IIR notch filter: simulation and implementation
Author :
Leotwassana, W. ; Punchalard, R. ; Silaphan, K.
Author_Institution :
Dept. of Telecommun., Mahanakorn Technol. Univ., Bangkok, Thailand
Abstract :
This paper presents an adaptive howling canceller using adaptive IIR notch filter. The robust and fast, sign-sign LMS, algorithm is used to adjust the notch parameter. For the implementation of the howling canceller, we use the TMS320C50, digital signal processor, to process in the fixed-point number system. The experimental results for different conditions are revealed that the proposed system can cancel the howling rapidly and efficiently.
Keywords :
IIR filters; acoustic signal processing; adaptive filters; digital signal processing chips; echo suppression; least mean squares methods; notch filters; TMS320C50; adaptive IIR notch filter; adaptive howling canceller; digital signal processor; fixed-point number system; infinite impulse response; least mean square; sign-sign LMS; Adaptive filters; Bandwidth; Feedback loop; Frequency; IIR filters; Least squares approximation; Loudspeakers; Microphones; Power amplifiers; Surface acoustic waves;
Conference_Titel :
Neural Networks and Signal Processing, 2003. Proceedings of the 2003 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
0-7803-7702-8
DOI :
10.1109/ICNNSP.2003.1279409
