超高速数字用户环路调制技术探讨

On the VDSL Modulation Technology

超高速数字用户环路（VDSL）是利用无屏蔽铜对绞线电缆（简称UTP）传输高速数字信号的新技术，将成为楼院分布系统的重要组织部分之一。本文探讨了各种对VDSL造成影响的主要因素，介绍各种VDSL的调制技术及克服VDSL主要损伤NEXT干扰的关键技术，并对各种调制技术在各方面的优劣进行了比较。

VDSL is a new technology which transmits high—speed digital via UTP cables,and will become the infrastructure of LANs.This paper explores various factors affecting VDSL,introduces various VDSk modulation technologies and a key technology,which oversomes NEXT interferences that constiture a jajor threat to VDSK,and compares various modulation technologies in all aspects.