摘要
上行链路功率回馈是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。文中首先对串扰做出分析，然后重点介绍了5种UPBO（upstream power back-off methods）的方案。最后，对多种UPBO方案的兼容性问题，描述了一种全球统一的理想接收功率谱密度的方案。
Upstream power backoff is the key technology in VDSL system. It is applied to reduce the strong FEXT introduced by short loops working together with long loops in the same binder. The principle of crosstalk is analyzed in this paper firstly. Then five methods of UPBO are introduced. Finally, a method of global desired receive PSD is described to the problem of compatibility in the methods of UPBO.
作者
郑开思
董俊
等
ZHENG Kaisi, DONG Jun, CAO Xuehong(Department of Information Engineering, Nanjing University of Posts and Telecommunications; Nanjing 210003, China)
出处
《江苏通信技术》
2002年第5期1-4,共4页
Jiangsu Communication Technology
基金
江苏省教育厅自然科学研究基金资助项目(01KJB510003)
