Fetal ECG Extraction from Abdominal Signals: A Review on Suppression of Fundamental Power Line Interference Component and Its Harmonics

<table>The block diagram of the DSWPT algorithm. <svg height="15.1125" id="M34" style="vertical-align:-2.3205pt" version="1.1" viewbox="0 0 27.112499 15.1125" width="27.112499" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg> is the signal of interest contaminated with the PLI signal, and <svg height="15.0875" id="M35" style="vertical-align:-2.3205pt" version="1.1" viewbox="0 0 26.2125 15.0875" width="26.2125" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,12.138)"><path d="M495 86q-46 -47 -87 -72.5t-63 -25.5q-43 0 -16 107l49 210q7 34 8 50.5t-3 21t-13 4.5q-35 0 -109.5 -72.5t-115.5 -140.5q-21 -75 -38 -159q-50 -10 -76 -21l-6 8l84 340q8 35 -4 35q-17 0 -67 -46l-15 26q44 44 85.5 70.5t64.5 26.5q35 0 10 -103l-24 -98h2
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</svg> represents the estimation of the PLI signal.</table>

Computational and Mathematical Methods in Medicine

fig7

Figure 7

Figure 7: Fetal ECG Extraction from Abdominal Signals: A Review on Suppression of Fundamental Power Line Interference Component and Its Harmonics 