非对称数字用户环路

本文较详细地介绍了非对称数字用户环路（ADSL）模拟前端的功能以及发信通道与接收信道的优化设计，可用于各种数字通信电路的设计中。

This paper introduces the function of simulators of unsymmetrical ADSL and the excellent design of sending and receiving message channels , which can be applied to many different designs of digital communication circuits .

今天，非对称数字用户环路和光纤同轴混合网掌握着市场的主要份额，这些宽带接入技术主要采用ATM技术。

Asymmetrical Digital Subscriber Loop ( ADSL ), Hybrid Fiber-Coax ( HFC ) based on ATM technique grabbed the main market share currently .

目前，非对称数字用户环路ADSL宽带技术倍受关注。

Presently , Asymmetric Digital Subscriber Line ( ADSL ) wideband technique is paid attention to extremely .

第一个OFDM技术的实际应用是非对称数字用户环路（ADSL），这是一种能够通过普通电话线提供宽带数据业务的标准。

One of the first commercial systems utilizing OFDM was ADSL ( asymmetrical digital subscriber line ), a standard for high data-rate communication over twisted-pair wires .

ADSL（非对称数字用户环路）以接入速度快、操作便捷、成本较低等独特优势，在宽带接入技术中占有举足轻重的地位。

ADSL ( Asymmetric Digital Subscriber Line ); an access fast , convenient access , lower cost and other unique advantages in the broadband access technology ; plays a decisive role .

Lite标准的非对称数字用户环路（ADSL）和甚高速数字用户环路（VDSL）都采用离散多音频（DMT）作为调制编码技术。

Lite Asymmetric Digital Subscriber Line ( ADSL ) modems and some Very-high-speed Digital Subscriber Line ( VDSL ) modems rely on discrete multitone modulation ( DMT ) .

除了流行的非对称数字用户环路、光纤同轴混合网和ATM无源光网络，学术界和工业界正日益表现出对于以太网技术应用于宽带社区接入网的巨大关注。

Apart from popular ADSL ( asymmetrical digital subscriber loop ), HFC ( hybrid fiber-coax ) and APON ( ATM passive optical network ), academic communities and industry are increasingly showing great concern about Ethernet technique in the subscriber access network .

简单介绍了各种宽带接入技术，重点介绍了ADSL（非对称数字用户线环路）接入技术及其应用，并给出详细的系统设计方案。

This paper gives a brief introduction of the main broad bandwidth IP accessing technology . It focuses on the ADSL ( Asymmetrical Digital Subscriber Loop ) access system , and gives the system solution to ADSL in the modern distance education .