Title :
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
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;
Conference_Titel :
Biomedical Engineering Conference (CIBEC), 2012 Cairo International
Conference_Location :
Giza
Print_ISBN :
978-1-4673-2800-5
DOI :
10.1109/CIBEC.2012.6473303
