Robustness of the blind source separation with reference against uncertainties of the reference signals.
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.
Netabayashi
Tomoyuki
T
Graduate School of Information Sciences, Tohoku University, Sendai 980-8579, Japan.
Kimura
Yoshitaka
Y
Chida
Shinichi
S
Ito
Takuro
T
Ohwada
Kazunari
K
Katayama
Norihiro
N
Okamura
Kunihiro
K
Nakao
Mitsuyuki
M
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