Binary FSK(Frequency Shift Keying) and PSK(Phase Shift keying) are extensively used in telecommunication for digital data transmission. FSK/PSK modulator circuits usually employ analogue components ...

一个射频载波，有三个变量，分别为幅度，频率和相位。用公式表示，就是： 所以，所谓的调制，就是对这三个变量进行调制。 在模拟调制中，分别有AM，FM和PM。 在数字调制中，分别有ASK，FSK和PSK。 鉴于现在通信系统中，用到的基本都是数字调制，所以今天就 ...

Digital information often must travel through analog channels in applications like satellite communication, digital cellular phones, digital microwave communication, and others. This transmission is ...

Signal modulation is one of the most basic and important concepts in the RF industry. It consists of using the variation of one or more parameters of a carrier signal to transmit information, ...