Comparison of two different methods for coherent averaging in online ECG analysis

The coherent averaging is an often used method in ECG systems for noise removing. Most algorithms are developed for the offline data analysis either with automatic or with manual pattern determination for cycles averaging. These algorithms can´t be used for a wearable long time ECG analysis system, which processes the biosignal continuously in real time, because the continuous analysis needs a lot of computational power, which can be provided only by PCs. Therefore, an online averaging algorithm was developed for the ECG signal filtering for wearable long time analysis systems. This article presents an effective algorithm for online ECG complex averaging. Also a comparison of two methods for cycle allocation is offered