一种VDSL上行链路自适应功率回馈方案  

A Method of VDSL Upstream Adaptive Power Back-Off Technology

作　　者：赵永刚 郑开思 ZHAO Yonggang, ZHENG Kaisi (Department of Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China)

机构地区：南京邮电学院信息工程系，江苏南京210003

出　　处：《江苏通信技术》2003年第5期24-26,共3页Jiangsu Communication Technology

基　　金：江苏省教育厅自然科学基金资助项目(01KJB510003)

摘　　要：上行链路功率回馈技术(UPBO：upstream power back-off)是VDSL(very high-speed digital subscriber lines)系统中的关键技术，它用于抵消同一电缆中短线对长线引起的严重的远端串扰(FEXT:far-end crosstalk)。文中从功率控制的角度分析了基于迭代注水的自适应UPBO方案，并进行了性能仿真分析。Upstream power backoff is a key technology in VDSL system, applied to reduce the strong FEXT introduced by short loops working together with long loops in the same binder. This paper analyzes adaptive UPBO method based iterative waterfilling algorithm from power control view and performs the result of simulation.

关 键 词：VDSL 上行链路 功率回馈 甚高速数字用户线 远近效应 迭代注水 远端串扰 自适应 

分 类 号：TN915.61[电子电信—通信与信息系统;电子电信—信息与通信工程]