کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6950927 1451638 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Foetal heart rate estimation by empirical mode decomposition and MUSIC spectrum
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر پردازش سیگنال
پیش نمایش صفحه اول مقاله
Foetal heart rate estimation by empirical mode decomposition and MUSIC spectrum
چکیده انگلیسی
It is still a challenge to estimate the foetal heart rate accurately from a strong nonstationary abdominal ECG signal. Even if signal process eliminates the predominant maternal ECG component, the foetal heartbeats are still very weak due to other existing interferences. This paper introduces empirical mode decomposition (EMD) and multiple signal classification (MUSIC) to tackle this issue. Firstly, preprocessing eliminates the interferences and noise in abdominal ECG signal and then the EMD is utilized to decompose the foetal ECG signal into a set of intrinsic mode functions, which could be used to detect the foetal QRS waves. Finally, the MUSIC is applied on the foetal QRS waves indicator sequence to estimate the foetal heart rate in the frequency domain with a high resolution. The basis functions of EMD are derived from the foetal signal under test, which makes the detection process robust and adaptive. In addition, the foetal heart rate estimation is carried out in the frequency domain regardless of the detection of R-wave peaks. In the simulated experiments with the proposed method, the mean value of the fHR estimation error is 2 BPM with a standard deviation of 1.5 at SNR = −30 dB, and it decreases to 0 when SNR = −16 dB. When compared to the fastICA algorithm, the proposed method shows robustness using three different real foetal ECG databases with variable degrees of nonstationarity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biomedical Signal Processing and Control - Volume 42, April 2018, Pages 287-296
نویسندگان
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