The resulting limit, given in units of bits per second, is the absolute maximum rate of error-free communication given signal strength and noise level.
在给定信号强度和噪声水平的情况下，以比特每秒为单位给出的最终限制是无差错通信的最大绝对速率。
2
This is the mechanical type ofcommunication, which includes the use ofsignal flags, the 21-gun salute, horns, and sirens.
这是一种机械式的传播，包含信号旗、21响礼炮、号角、汽笛。
3
The classification and identification ofcommunicationsignal is a typical statistical pattern identification.