Variable bandwidth ecg high pass filter

Abstract

An electrocardiogram high pass filter () employs a baseline low pass filter (), a signal delay () and a signal extractor (). In operation, baseline low pass filter () includes a finite impulse response filter () and an infinite impulse response low pass filter () cooperatively low pass filtering a baseline unfiltered electrocardiogram signal (ECGbu) to output a filtered baseline signal (BSEf). Baseline low pass filter () further includes a baseline wander estimator () dynamically adjusting a corner frequency of baseline low pass filter () as a function of an estimation of any baseline wander within the baseline unfiltered electrocardiogram signal (ECGbu). Signal delay () time delays the baseline unfiltered electrocardiogram signal (ECGbu) to output a delayed baseline unfiltered electrocardiogram signal (ECGdbu), and signal extractor () extracts the filtered baseline signal (BSEf) from the delayed baseline unfiltered electrocardiogram signal (ECGdbu) to output a baseline filtered electrocardiogram signal (ECGbf).