amplitude modulation frequency modulation的意思|示意

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。

The system adopts AGC circuit, uses DDS technology to realize such functions as frequency modulation, amplitude modulation, ASK, PSK, etc.

系统采用自动增益控制电路，并运用DDS技术实现调频、调幅，ASK、PSK等功能。

We also analysed the influence of amplitude modulation and frequency (or phase ) modulation on Interferometer Direction Finder.

对三波道干涉仪测向结果不受幅度调制和频率调制（相位调制）的影响进行了数学分析。

The present invention provides a structure in which an amplitude-modulation mode and a frequency-modulation mode are switched.

本发明提供了一种结构，其中振幅调制模式和频率调制模式被切换。

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。

In frequently used methods, sine wave is used as carrier with amplitude modulation (am), frequency modulation (FM) and phase modulation (PM) implied.

常用的调制方式使用正弦波作为载波并对其进行幅度调制(AM)和角度调制即调频(FM)或调相(PM)。