title: Robustness of the blind source separation with reference against uncertainties of the reference signals.
abstract: The fetal electrocardiogram (ECG) could provide clinical information concerning physiological conditions of the fetus. In order to extract fetal ECG, we proposed the novel algorithm, the blind source separation with reference (BSSR), which successfully extracts a complete waveform of QRS complex and avoids uncertainty in the order of the extracted signals. In the BSSR, the reference signal is supposed to be generated from the ultrasonic Doppler signal. Thus generated reference is expected to suffer from uncertainties in waveform and occurrence timing. Based on simulations, the BSSR is shown to have robustness against the uncertainties of reference signals. In addition, it is shown how the robustness depends on the order of power of correlation function between the reference and extracted signals, which composes a performance function of the BSSR.
authors.affiliation: Graduate School of Information Sciences, Tohoku University, Sendai 980-8579, Japan.
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Netabayashi
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Kimura
authors.forename: Shinichi
authors.initials: S
authors.lastname: Chida
authors.forename: Takuro
authors.initials: T
authors.lastname: Ito
authors.forename: Kazunari
authors.initials: K
authors.lastname: Ohwada
authors.forename: Norihiro
authors.initials: N
authors.lastname: Katayama
authors.forename: Kunihiro
authors.initials: K
authors.lastname: Okamura
authors.forename: Mitsuyuki
authors.initials: M
authors.lastname: Nakao
mesh_terms: D000465:Algorithms; D001698:Biomedical Engineering; D003198:Computer Simulation; D004562:Electrocardiography / Q000706:statistics & numerical data*; D055724:Electrophysiological Phenomena; D005260:Female; D005318:Fetal Heart / Q000502:physiology*; D006801:Humans; D008955:Models, Cardiovascular; D011247:Pregnancy; D012815:Signal Processing, Computer-Assisted