The transmission medium for a digital channel can be opticalcable, digital microwave link and satellitecircuit, etc.
数字信道的传输媒体可以是光缆、数字微波、卫星信道等各种手段。
2
In fact, a four - wire circuit can be established without the use of any wires at all, as in the case with a circuit established over microwave, satellite, or infrared transmission systems.
事实上，可以不使用任何线来建立四线电路，例如通过微波、卫星或红外传输系统。
3
Therefore, analyzing the transmission of satellite communication and utilizing information encoding and decoding circuit are the key to reduce wrong code in transmission.