目的：介绍一种基于低压电力线通信的病房呼叫系统。
Objective To introduce ward calling system based on power line communication.
结果表明，该低压电力线扩谱通信系统具有较强的抗干扰能力。
The experiment results indicate that the system has rather strong anti-jamming ability.
电力线载波通信系统利用电力线来实现远程数据传送。
Carrier current systems use the power line mains to transfer information between remote locations.
电力线载波通信系统中，对接收信号的处理是非常重要的。
In PLC system, it is very important to process the received signal.
电力线载波通信系统中，对接收信号的处理是非常重要的。
In PLC system, it is very important to process the received signal.
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