摘要
线路状况的有效检测对于运营商为客户提供开通以及维护服务有着十分重要的作用。然而,复杂的线路结构中节点间存在着多次反射和未知的终端状态,这些都会使通过单端时域反射(TDR)来判定ADSL线路拓扑变得相当困难。在此,提出了通过发射双极性脉冲,并在回波数据中搜索满足幅值与相位条件的极点对来推断线路拓扑的方法。经验证,该方法对实际系统中常见的线路拓扑有很好的识别效果。
The effective detection of the line conditions plays an important role in the process of an operator′s DSL provision and maintenance.However,complicated loop topology,multiple reflections between nodes,unknown terminal status make topology identification from the central office a challenge job.A new approach of topology identification by injecting an ambipolar pulse in the test line and searching for the extreme pairs in echo data is presented.It proves that this method has good recognition result in actual system.
出处
《现代电子技术》
2010年第10期37-39,共3页
Modern Electronics Technique
关键词
数字用户线路
单端线路测量
拓扑识别
信道容量
digital subscriber line（DSL）
single ended line testing（SELT）
topology identification
channel capacity
