Simplified fast stabilized adaptive noise canceller with parallel block structure

Benjangkaprasert, Chawalit; Janchitrapongvej, Kanok; Saingaroon, Ornlarp; Takahashi, Nobuaki

Simplified fast stabilized adaptive noise canceller with parallel block structure

Author(s)

Benjangkaprasert, Chawalit

Janchitrapongvej, Kanok

Saingaroon, Ornlarp

Takahashi, Nobuaki

Date Issued

December 1, 1997

Type

Conference Paper

Abstract

In this paper, a new simplified adaptive algorithm with parallel block structure using an IIR bandpass filter to improve the processing and convergence rates of adaptive noise canceller are proposed. The procedure is as follows Firstly, an IIR bandpass filter with a variable center angular frequency using adaptive Q-factor control by the parallel block structure. Secondly, the output signals of filter and generators with parallel block structure are analyzed by the use of a new simplified adaptive algorithm. In order to reduce the computational complexity, two generators are realized by using parallel block structure. In addition, the characteristics after the convergence of filter is then stabilized, and the speed up of the convergence rate has been achieved by means of a variable step size parameter which is in inversely to Q-factor. Finally, the simulation results are given to demonstrate the convergence performance.

Citation

International Symposium on IC Technology Systems and Applications, 7, 120-123, 1997