The compare of the modulation mode in the VDSL

WANG Yang; ZHOU Zhen

doi:10.13756/j.gtxyj.2004.05.010

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The compare of the modulation mode in the VDSL

- The compare of the modulation mode in the VDSL
- Study on Optical communication Issue 5, Pages: 30-32(2004)
- 作者机构：
  
  1. 武汉邮电科学研究院
  2. 武汉邮电科学研究院湖北武汉　430074
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2004.05.010
  CLC： TN915.6
- Published：2004，
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[1]王阳,周箴.VDSL中调制方式的比较[J].光通信研究,2004(05):30-32+67.

WANG Yang, ZHOU Zhen. The compare of the modulation mode in the VDSL. [J]. (5):30-32(2004)
[1]王阳,周箴.VDSL中调制方式的比较[J].光通信研究,2004(05):30-32+67. DOI： 10.13756/j.gtxyj.2004.05.010.

WANG Yang, ZHOU Zhen. The compare of the modulation mode in the VDSL. [J]. (5):30-32(2004) DOI： 10.13756/j.gtxyj.2004.05.010.

摘要

甚高速数字用户线（VDSL）是数字用户线（DSL）家族中速率最高的接入方式.新一代VDSL速率最高可到100Mbit/s以上

包括对称传输和非对称传输以及多种不同的传输速率.由于VDSL的传输速率高

其对应的传输距离和其他DSL技术相比较短.调制方式是VDSL中的核心技术

目前有两种并存的方式

离散多音（DMT）与正交/调幅和无载波调幅/调相（QAM/CAP）.文章主要介绍这两种调制方式

并从多个方面对其优、缺点进行比较.

Abstract

Very-high-speed digital subscriber line（VDSL） is the fastest access technology of the xDSL family.The new VDSL system’s bandwidth can reach 100 Mbit/s on a single telephone wire pair.It can provide very high symmetric and asymmetric bandwidth.Because of the high rate

the transmission distance of the VDSL is shorter than the other DSL technology.The mode of the modulation is the key technique. At present

There are two different modulation mode（DMT and QAM/CAP mode）.This article explains the two modulation modes

and compare the excellence and the disadvantage of these modes.

关键词

甚高速数字用户线调制解调正交幅度调制离散多音

Keywords

VDSLMODEMQAMDMT

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