摘要
作者根据高频传输线理论导出了用于分析同轴电缆网络回波反射的等效基带模型.在此基础上,作者导出了用同轴电缆参数、电缆两端器件的反射损耗、所选调制技术的接收门限信噪比和信息传输速率表示的存在码间干扰的电缆长度区间公式和电缆网络不需均衡的信息传输速率上限.该结果既适用于上行信道。
According to the high frequency transmission line theory,the equivalent basband model applied to the analysis of the reflection in cable network is derived first.And the cable length region formula where the inter\|symbol interference will occur,represented by the cable parameters,reflection distortion of the devices at the two ends of the cable,the signal\|to\|noise ratio threshold of the selected modulation and the information transmission rate,is presented. The upper limit of the information transmission rate in the cable network that equalization is unrequired is also given. The results obtained here are applicable to the return channel,as well as the digital signal transmission and digital television transmission in the downstream channel.
关键词
同轴电缆网络
回波反射
码间干扰
cable network
reflection
inter\|symbol interference
