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Optimal frequency and bandwidth for FIR bandpass filter for QRS detection

By Fernando Soares Schlindwein, A.C. Yi, Tim Edwards and I.C.H. Bien


Paper given at MEDSIP 2006, The 3rd International Conference on Medical Signal and Information Processing, Glasgow, UK, 17-19 July, 2006. Paper archived here with the kind permission of the Institution of Engineering and Technology ( MIT-BIH arrhythmia database (48 ECG records of 30 min each) was used to find out, experimentally, which combination of centre frequency and bandwidth is ‘optimal’ for a pre-emphasis digital Finite Impulse Response (FIR) band-pass filter for QRS detection. An exhaustive search was performed for centre frequencies ranging from 13 to 20 Hz and for band-widths from 5 to 12 Hz, at integer values of 1 Hz for both. The criterion for optimality was simply the filter that, coupled with a simple threshold detector, produced the minimum number of errors (defined as the sum of false-positives and false-negatives). For the whole MIT-BIH database the ‘optimum’ point was found to be that where centre frequency, fc=19 Hz and bandwidth, BW=9 Hz

Year: 2006
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