心电图信号的频域分析
Frequency-domain Analysis of ECG Signals
提出了一种简便有效的、由心电图（ECG）曲线提取QRS-T复合波的新方法，从而获得P波（当房颤未发生时）或f波（当房颤时）；利用功率谱、自相关、互相关等信号处理技术，对它进行了处理和分析，特别是，比较了未房颤时和发生房颤时的相关信息的显著差别。
A new simple approach to effectively detect QRS — T complexes in ECG curve is described, so as to easily get the P-wave (when AF does not happen) or the f-wave (when AF happens). By means of signal processing techniques such as the power spectrum function, the auto-correlation function and cross-correlation function, two kinds of ECG signals when AF does or does not happen were successively analyzed, showing the evident differences between them.
心电图（ECG） / QRS-T复合波 / P波 / 房颤波（f波） / 频数直方图 / 功率谱 / 自相关 / 互相关
ECG curve / P-wave / f-wave / AF (atrial fibrillation) / histogram / power spectrum / autocorrelation / cross-correlation
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