ECG recordings during effort tests present different kinds of interferences. Several noise cancelling methods have been presented in literature, and, among them, adaptive ones have shown a good performance. In this paper, a new scheme for adaptive filtering of ECG signals is presented. It is based on two previously published algorithms which perform inter-beat average. Hence, their outputs are not always suitable. Our modifications provide a better output ECG signal since it is not an inter-beat average. Moreover, this scheme is simpler from a hardware point of view, as only one recording channel is required.
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