VDSL收发器的硬件设计与性能分析

Proceedings of Third International Conference on Electronics, Circuits, and Systems Pub Date : 1996-10-13 DOI:10.1109/ICECS.1996.582632

A. Wörner, M. Schenk, D. Schmücking

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引用次数: 3

摘要

采用光纤/双绞线混合结构，在双绞线接入网的配电部分，通过安装的双绞线电缆，数据传输速率可达50mbit /s左右。基于测量得出的频率高达40mhz的双绞线电缆的信道模型，比较了不同的传输格式。结论是基于QAM(正交调幅)或CAP(无载波AM/PM)的频分复用VDSL(非常高比特率数字用户线)系统是一个很好的选择。本文提出了两种可扩展的系统方案。两个系统都可以在大约800米的距离上对称传输12.5 Mbit/s。系统1也可以在280米的范围内实现50/ 2mbit /s的不对称传输，而系统2可以在300米的范围内实现25mbit /s的对称传输。根据均衡器所需的滤波器长度和自适应滤波器内信号的字长，确定了所提出的VDSL收发器的硬件复杂度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Hardware design and performance analysis of VDSL transceivers

With a hybrid fiber/twisted-pair architecture, data rates up to about 50 Mbit/s can be transmitted over installed twisted-pair cables in the distribution part of twisted-pair access networks. Based on a channel model for twisted-pair cables for frequencies up to 40 MHz derived from measurements, different transmission formats are compared. It is concluded that frequency division multiplexed VDSL (Very high bit rate Digital Subscriber Line) systems based on QAM (Quadrature Amplitude Modulation) or CAP (Carrierless AM/PM) are a good choice. In this paper, two scalable system proposals are presented. Both systems can transmit 12.5 Mbit/s symmetrically over a distance of about 800 m. System 1 enables as well the asymmetrical transmission of 50/2 Mbit/s over 280 m, whereas system 2 enables the symmetrical transmission of 25 Mbit/s over 300 m. Based on the required filter lengths of the equalizer and the wordlengths of the signals within the adaptive filters, the hardware complexity of the proposed VDSL transceivers is determined.

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Proceedings of Third International Conference on Electronics, Circuits, and Systems

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