Amplitude modulation is to control the amplitude of signal carrier and make it change linearly with modulation signals and maintain its frequency.

幅度调制是用调制信号去控制载波的振幅，使其随调制信号线性变化，而保持载波的频率不变。

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This modulation include either amplitude modulation or frequency(phase) modulation.

包括幅值调制和频率（相位）调制两部分。

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Under the same amplitude modulation index and same frequency modulation index, different SVM waveforms can be derived from different sampling point distributions.

相同频率调制比和幅度调制比的情况下，对调制波信号的不同采样点分布可以得到不同的SVM波形。

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