Principle and application of adaptive noise equalizer

Author

Kuo, Sen M. ; Ji, Min J.

Author_Institution

Dept. of Electr. Eng., Northern Illinois Univ., DeKalb, IL, USA

Volume

41

Issue

7

fYear

1994

fDate

7/1/1994 12:00:00 AM

Firstpage

471

Lastpage

474

Abstract

This paper presents the principle and application of an adaptive noise equalizer (ANE) with adjustable gain or attenuation capabilities. The residual error of the ANE system contains the narrow-band noise components whose amplitude can be linearly and arbitrarily controlled by adjusting the gain parameter of the equalizer. Each ANE consists of a sinusoidal reference input and two adaptive weights. A pseudo error minimum method is developed to effectively utilize the well-understood least-mean-square algorithm. By partially separating the system output from the cost function to be minimized, the ANE can perform either a harmonic noise attenuator or amplifier by a predetermined amount. The application to active noise control is presented, and computer simulation results demonstrate the desired noise shaping capability

Keywords

adaptive filters; equalisers; filtering and prediction theory; gain control; interference suppression; least squares approximations; active noise control; adaptive noise equalizer; adaptive weights; adjustable attenuation capability; adjustable gain capability; cost function; gain parameter; harmonic noise attenuat; least-mean-square algorithm; narrow-band noise components; noise shaping capability; pseudo error minimum method; residual error; sinusoidal reference input; Attenuation; Attenuators; Computer errors; Control systems; Cost function; Equalizers; Error correction; Narrowband; Noise level; Noise shaping;

fLanguage

English

Journal_Title

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7130

Type

jour

DOI

10.1109/82.298380

Filename

298380