摘要
多载波传输技术诞生于 ６０年代，理论上具有接近香农极限的性能。分析了以 ＤＭＴ和 ＤＷＭＴ为代表的多载波传输技术的特点及关键技术，并全面比较了它们的性能。详细介绍了多载波技术在宽带接入网，如ＡＤＳＬ，ＤＳＬ ｌｉｔｅ，ＶＤＳＬ，ＳＤＶ及ＨＦＣ等系统中的最新应用，并分析了存在的基本问题。
Multicarrier transmission technologies were born in 1960's and have suboptimal theoretical performance approaching Shannon limitation. This paper analyses their charcteristics and key issues, represented by DMT and DWMT. In addition, the comparison of performance between DMT and DWMT is made in detail. Finally we introduce the newest applications of multicarrier transmission technologies to broadband access networks, such as ADSL, DSL lite, VDSL, SDV, HFC system and pointout exiting problems.
出处
《数字通信》
2000年第3期38-40,共3页
Digital Communications and Networks
基金
本文受邮电部重点项目
"ADSL(不对称数字用户线)/HDSL(高速数字用户线)的研制"与信息产业部重点项目
"SAV(交换
关键词
宽带接入网
多载波
传输技术
数字用户线路
broadband access networks
multicarrier
ADSL
VDSL
HFC
SDV
discrete multitone
discrete wavelet multitone.
