Digital signal processing of an electrocardiogram measured with non-touching electrodes
Semah, Madjid Djamel
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This research work is a part of a project towards developing an electrocardiogram measured with non-touching electrodes. One of the objectives is to make this device portable and implemented in a car environment. The sensors are composed of two E-field sensor boards which supply the ECG signal by capacity coupling to the signal conditioning circuits. These signal conditioners filter out some of the unwanted frequencies and amplify the ECG. This signal is given to an analog to digital converter which digitizes it and then the data are recorded. The main goal of this research is to process the recorded digitalized ECG waveforms trough Matlab to get a signal as clean as possible with an acceptable signal to noise ratio. Different digital processing filters will be implemented and then the results will be displayed through different Matlab graphics. Another feature implemented in the digital processing is de QRS detection and the heart rate monitoring. Also included are discussions on the error probabilities, advantages and disadvantages of method used, future research and improvements.