Title :
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
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;
Conference_Titel :
Engineering in Medicine and Biology Society, 1995., IEEE 17th Annual Conference
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-2475-7
DOI :
10.1109/IEMBS.1995.579718
