Using time-varying autoregressive filter to improve EMG amplitude estimator

Author

Luh, Jer-Junn ; Chang, Gus-Ching ; Cheng, Cheng-Kung ; Lai, Jin-Shin ; Kuo, TeSon

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

Volume

2

fYear

1995

fDate

20-23 Sep 1995

Firstpage

1343

Abstract

An electromyography (EMG) amplitude estimator can be the proportional control input of power prostheses or functional electrical stimulation system. In this paper, an improved temporal whitening process through a time-varying autoregressive (AR) filter is evaluated in experiment. The results of the authors´ experiment demonstrated time-varying whitening filter can improve the SNR of the amplitude estimators. It implies the influence of nonstationary characteristics of tissue filtering

Keywords

artificial limbs; autoregressive processes; biocontrol; electromyography; medical signal processing; muscle; neurophysiology; proportional control; time-varying filters; EMG amplitude estimator improvement; amplitude estimators; electrodiagnostics; functional electrical stimulation system; nonstationary characteristics; power prostheses; proportional control input; temporal whitening process; time-varying autoregressive filter; tissue filtering; Amplitude estimation; Automatic control; Biomedical signal processing; Electromyography; Flowcharts; Nonlinear filters; Prosthetics; Samarium; Signal processing; White noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1995., IEEE 17th Annual Conference

Conference_Location

Montreal, Que.

Print_ISBN

0-7803-2475-7

Type

conf

DOI

10.1109/IEMBS.1995.579718

Filename

579718