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心电图是运动医学中评定心脏功能的一个重要指标但它是一个相当复杂的非正弦波的周期信号,它的重复频率,正常人(以每分钟72次心跳计)为1.2赫兹。根据频谱分析原理,可把心电图分解成一系列正弦波信
The ECG is an important indicator of cardiac function in sports medicine but it is a rather complex non-sinusoidal periodic signal whose repetition rate is 1.2 Hz for normal people (72 beats per minute). According to the principle of spectrum analysis, the ECG can be decomposed into a series of sine wave signals