Patent ID: 8886299

Claim:
A microprocessor configured to receive and process digitized signals derived from an analogue ECG signal, said digitized signals being a digital ECG signal and digital in-phase and quadrature phase band power signals, the microprocessor comprising: a beat detection unit configured to receive the in-phase and quadrature phase band power signals, calculate a band power value and an adaptive threshold value, and compare said band power value with said adaptive threshold value to detect a QRS complex of the ECG signal indicative of a detected valid beat; and an R peak detection unit configured to receive the digital ECG signal and information about the detected valid beat, select a portion of the received ECG signal as a first time window around the detected valid beat; determine the location of a first R peak position based on a continuous wavelet transform calculation of said selected portion of the received ECG signal; and perform a time domain search in a second time window around said first R peak position in order to locate a final R peak position.