A design of LMS with order adaptation for feedback echo cancellation in hearing aids

Author

Kongpoon, Metha ; Chinrungrueng, Chedsada

Author_Institution

Dept. of Electron. Eng., King Mongkut Inst. of Technol., Bangkok, Thailand

fYear

2012

fDate

20-22 Dec. 2012

Firstpage

81

Lastpage

86

Abstract

This paper describes a design of a hybrid adaptive filter for feedback echo cancellation in hearing aids. The proposed design utilizes a multiplexing direct form (MDF) FIR filter, and the LMS algorithm with order adaptation in order to reduce a requirement of a chip area and to minimize power consumption wasted in activities of non active taps. The proposed design can operate up to 6.25MS/s, and could save 26% of power consumption compared to a conventional fixed order FIR filter with LMS adaptation.

Keywords

FIR filters; adaptive filters; adaptive signal processing; echo suppression; hearing aids; least mean squares methods; medical signal processing; prosthetics; LMS adaptation; LMS algorithm; chip area; feedback echo cancellation; hearing aids; hybrid adaptive filter; multiplexing direct form FIR filter; non active taps; order adaptation; power consumption; Adaptive filters; Filter banks; Finite impulse response filter; Logic gates; Multiplexing; Power demand; Registers; LMS; echo cancellation; low power adaptive filter; order adaptation;

fLanguage

English

Publisher

ieee

Conference_Titel

Biomedical Engineering Conference (CIBEC), 2012 Cairo International

Conference_Location

Giza

ISSN

2156-6097

Print_ISBN

978-1-4673-2800-5

Type

conf

DOI

10.1109/CIBEC.2012.6473303

Filename

6473303