Pulse amplitudemodulation (PAM) is one form of the ways, in which it is widely used in the system of communication and control.
脉冲幅度调制波（PAM）是脉冲调制的一种形式，在通信和控制系统中得到广泛应用。
2
Quadrature AmplitudeModulation (QAM) is used to transfer signals by digital TV system based on DVB_C standard.
基于DVB_C标准的数字电视系统采用正交幅度调制(QAM)传送信号。
3
Furthermore, the expression of stationary bit error rate of system output corresponding to equiprobability quaternary pulse amplitudemodulation (PAM) input signals was deduced.