Estimation of intramuscular EMG signals from surface EMG signal analysis

We present a method for the estimation of intramuscular electromyographic (EMG) signals from the given surface EMG signals. This method is based on representing the surface EMG signal as an autoregressive (AR) time series model with a delayed intramuscular EMG signal as an input. Assuming that prototypes of intramuscular and surface EMG signals are available, the parameters of the time series model that transforms the intramuscular signal to the surface signal are identified. The identified model is then used in estimating the intramuscular signal from the surface signal. This method is illustrated using real EMG waveforms.