line attenuation coefficient 线衰减系数
overall line attenuation 线路净衰减 ; 线路总衰减
transmission-line attenuation [电讯] 传输线衰减
But, there exists serious noise and channel attenuation in power line and they affect the quality of communication seriously.
但由于电力线路存在着强噪音、信道衰减等原因，严重影响了通信质量。
First, power line Communication is introduced. The noise and attenuation characteristics of power line channel are measured and modeled.
首先，介绍了电力线通信，测量并分析了电力线信道的噪声和复衰减特性，并分别进行了建模。
First, power line Communication (PLC) is introduced. The noise and attenuation characteristics of power line channel are measured and modeled.
首先，介绍了电力线通信(plc)，测量并分析了电力线信道的噪声和复衰减特性，并分别进行了建模。
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