Digital elliptic filter application for noise reduction in ECG signal

Abstract

Digital filters plays very important role in the processing of the low frequency signals. Numbers of biomedical signals are of the low frequency. The ECG signal, which preliminary represents the condition of the heart. It has the frequency range form. 5 Hz to 100Hz. Artifacts introduced in the signal create numerous difficulties against the physician. The work is the step in the direction for reduction of the artifacts using digital filter. The paper deals with design of the well-known elliptic filter in digital domain. The three filters of the elliptic approximation are designed and implemented on the real time ECG signal. The real time ECG signal is extracted using instrumentation designed with the help of the instrumentation amplifier from INA series. It is found that the elliptic filter introduced works well as compared to the Butterworth, chebyshev type I & type II with some limitations. In general overall filter works satisfactorily.