非对称数字用户线（ADSL）技术与应用研究

【作者】 彭宝华；

【导师】 赵忠；

【作者基本信息】 西北工业大学 ， 检测技术与自动化装置， 2002， 硕士

【摘要】 信息产业飞速发展，尤其是因特网的普遍应用，使宽带化成为接入网的发展趋势。非对称数字用户线(ADSL)技术以充分利用现有双绞线资源的潜力为出发点，在不影响电话业务的同时，提供高速、非对称的数据接入。本文系统研究了非对称数字用户线的理论，重点研究了国际上对其通用的编码方式—离散多音调制(DMT)技术。同时还研究了其发送与接收机模型。针对ADSL应用，本文着重介绍了32路ADSL局端业务板的开发与设计。同时，在开发的过程中，运用理论知识解决了ADSL初始化和其建立连接等问题。 论文的主要工作：深入研究ADSL理论及其离散多音调制。设计、并实际开发了高集成度32路ADSL局端业务板。目前，ADSL业务板已经过各项严格测试，在实验室及深圳试验局运行良好。更多还原

【Abstract】 With the rapid development of Information Technology (IT), especially the universal application of Internet, broadband Access Networks (AN) become more and more prevalent. Asymmetric Digital Subscriber Loop (ADSL) is the technology that provides high-speed, asymmetric data access, synchronously the potential of Twisted Pair(TP) is utilized, and the Plain Old Telephone Service(POTS) is not interrupted. We study the theory of Asymmetric Digital Subscriber Loop (ADSL), important in Discrete Multi-Tone (DMT) modulation that is the usual international encoder in ADSL. In the same time, we study the model of transmitter and receiver. About the application of ADSL, We design and debug the of 32 line ADSL board for CO(Center Office) in this paper. In addition, about the process of practice in design the ADSL board, we solve the questions such as the initialization and connection of ADSL etc.The main works in the paper could be described as follow: Study the theory of ADSL and DMT, design and debug the high density 32 line ADSL board for CO. At present, the ADSL board has passed all strict tests. They run steadily in the lab and the telecommunication office of Shenzhen for test.更多还原