Proposal of Single Input BSS Method Using QMF for Pulse Wave Extraction

Recently, a study of Pulse Wave(PW) extraction methods using blind source separation (BSS) has been progressing. BSS is a method to separate double source signals using only the signals observed by double sensors. In the pulse wave extraction method, various types of noises and PW are used as source signals, and the PW is extracted using BSS from the observed signal that is a mixture of these signals. However, since this method uses double sensors, there are still issues to be solved for practical use, such as adjusting the distance between sensors. In this study, we propose a single-input BSS method for PW extraction to solve this problem. In the proposed method, two series of signals are generated by a single input signal using QMF, and the BSS of these signals is used as the basis of the PW extraction method.