Pulse amplitude modulation (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
It is a key problem to detect the ultrashort pulse in optical communicationsystem.
在光纤通信系统中，超短光脉冲的检测一直是一个重要的问题。
3
These functions are realized by the circuits of power, clock, memory, ultrasonic pulse signal occurs and handle, temperature gathered and serial communication in system.