Research on Algorithm of Extracting PPG Signal for Detecting Atrial Fibrillation based on Probability Density Function

摘要

The paper introduced a new method based on probability density function (PDF) and phase space diagrammethod for photoplethysmography (PPG) signal extracting. In the paper, PPG information was generated from humanfingertips by smartphones. The pulse wave period was then separated and reconstructed into probability density function(PDF) by the phase space diagram algorithm. The difference between normal sinus rhythm (NSR) and atrial fibrillation(AF) was finally found by skewness of the PDF. The results of the present study demonstrates that the new method isvividly viable for detecting AF on the smartphone.