【作者】 黄晶；

【导师】 刘德明；

【作者基本信息】 华中科技大学 ， 物理电子学， 2007， 硕士

【摘要】 基于IEEE802.11g协议的无线局域网是数据通信里的新兴领域,它所提供的无线宽带接入功能在很大程度上满足了用户在移动情况下对无线数据传输宽带接入的需求,具有巨大的市场前景。无线局域网中的核心设备是无线接入点,其性能的好坏将直接影响网络的系统容量与业务处理能力,无线接入点的研究对于无线局域网的应用和发展具有重要的意义。以太无源光网络(EPON)是一种解决宽带接入的经济高效的方案,它在中心局和用户间提供光接入。本课题设计了一种基于EPON的无线传输系统,通过无线接入的方式来解决光纤到户中“最后100米”的接入问题。本系统还利用到了有线电视网络中的同轴电缆资源。无线网络信号可以与有线电视信号混合在一起传送到用户端,然后无线网络信号分离后再通过天线发射,用户就可以实现网络的无线接入。文章深入分析了IEEE802.11无线局域网协议和无线局域网体系结构,进而得到无线接入点的实现方案。首先分析了无线接入系统的功能需求,然后选定一种基于ARM的通用嵌入式开发平台。在实现部分,重点描述了无线接入点的硬件和软件设计内容。选用基于Marvell公司的微处理芯片88W8510H为核心的硬件处理平台,并对它的硬件模块结构和软件设计层次进行了详细介绍。最后,文章列出了无线接入点单板及整个无线传输系统的性能测试结果,并对其进行了具体分析。更多还原

【Abstract】 Wireless Local Area Networks(WLAN) based on IEEE802.11g is a new and booming branch in data communication, which has a promising future. Among the WLAN networks, the Access Point(AP) is the most important device, and its performance would affect the range and throughput of the network greatly. Therefore, the research on this device is of great significance for WLAN system. Ethernet passive optical network (EPON) is emerging access network technology that provides a low-cost method of deploying optical access lines between a carrier’s central office and a customer site.Wireless access over EPON transmission system is designed in our project, Which can provide the access of "the last 100 metres" in FTTH. Our system can make use of HFC in Community Antenna Television (CATV).The RF signal of network can be mixed with the CATV signal, and they can be transmitted together. Then the signals will be separated by a filter, so user can connect to The Internet without twisted-pair.The IEEE802.11 protocol and the architecture of WLAN are investigated, and the scheme of implementation is concluded. First of all, summarize the requirement analysis, then choose a general hardware platform based on ARM. In implement part,the hardware and software development process are also presented. 88W8510H microprocessing unit from Marvell is used as the hardware design platform, and its model block of hardware and software development hiberarchy are introduced. Finally the system’s test scheme and result are presented at the end of this paper.更多还原