Adaptive Noise Reduction of Multichannel Signals Obtained by Capacitive ECG Sensors

Capacitive electrocardiogram (ECG) sensors have been developed as a non-intrusive measurement to obtain ECG in daily life. However, the sensors are sensitive to motion noise caused by user's movement so that this paper suggests a novel noise reduction using active noise cancellation (ANC) with multichannel signals. The proposed algorithm can detect reliable QRS interval and conserve its power while noise is reduced outside the interval. As a result, the proposed algorithm achieved more accurate R peak detection of ECG measured in driving situation than single channel ANC. The method will be useful in the filed reducing noise of multichannel biomedical signal.