单线对高速数字用户线系统设计与实现

Design and Implementation of SHDSL

单线对高速数字用户线(SHDSL)是国际电信联盟(ITU)推荐的一种高速、对称的数字用户线技术。本文介绍了一种SHDSL设计方案和实现方法。首先对系统进行总体描述,接着描述了系统的硬件设计,介绍了嵌入式计算机C-ARM8637的特征和其PC104总线的使用,以及实现数据传输编解码的专用DSP的特征。软件部分主要描述了基于Vx-Works的开发环境配置和收发器有关的主要函数接口。

Single-Pair High Rate Digital Subscriber Line, recommended by ITU, is a high rate and symmetry digital subscriber line （SDL） technology. A design and implementation solution of symmetry single pair high-rate DSL is presented. First, this paper introduces overview of the system, then describes the hardware design, and introduces the feature of C-ARM8637 embedded computer and the use of PC104 bus, as well as the feature of dedicated DSP which implement cede and decode. The part of software mainly depicts the configuration based on VxWorks development environment and application function interface on operating transceiver.