关于振幅调制特性的研究

Research on Amplitude Modulation

调制是将要传送的信息装载到某一高频(载波)信号上去的过程。振幅调制是用调制信号去控制载波的幅度,使其随调制信号线性变化,而保持载波的频率不变。在幅度调制中,根据已调信号的频谱分量不同,分为普通调幅(标准调幅AM)、抑制载波的双边带调幅(DSB)、抑制载波的单边带调幅(SSB)。它们的主要区别是产生的方法和频谱结构不同。

Modulation is the transmission of information to be loaded onto a high- frequency （carrier） signal in the process. Amplitude modulation using signal to control the rate of carrier, with its linear modulation signal changes, and maintain the same carrier frequency. In the amplitude modulation, in accordance with the strength of signals in the spectrum of different components, it is divided into ordinary AM （amplitude modulation standard AM）, with inhibition of bilateral carrier AM （DSB）,the carrier single sideband suppression AM （SSB）. The main difference is the different methods and structure of the spectrum.