An Approach of QRS Detection Using Fractional Order Digital Differentiators

Detection of QRS complex is an important step for the analysis of heart rate variability. It has been proved that the algorithms based on the use of differentiation are efficient and hence can be used for the real-time analysis. At the same time, fractional order digital differentiators are gaining their interest in many areas of research. In this paper, an attempt is made to detect QRS complex by making use of the proposed transfer functions of digital differentiators. The transfer functions in s domain are obtained by making use of the Continued Fraction Expansion Method. The Bilinear Transform and Al-Alaoui Transform are used for the purpose of discretization. These filters are used for the detection of QRS complexes. The result has been proven to be comparable to the conventional techniques.