小波域的盲源分离，可以有效地去除噪声，尤其是在胎儿心电提取方面-Wavelet domain blind source separation can effectively remove the noise, especially in regard to extraction of fetal ECG

对心电进行去噪滤波，平滑，以及阈值提取特征-Remove the noise on the ECG filtering, smoothing, and feature extraction threshold

Matlab code to remove 50hz noise from ecg.