基于USRP的高效多址接入协议的设计与实现-电子与通信工程专业论文.docx

多址接入控制协议是网络的重要组成部分，特别是在分布式网络中，它直接影 响网络的性能。随着技术的发展，如何将物理层和多址接入层有效的结合起来， 如何在接入时可以有效的利用资源，这些因素对网络性能上的提升具有重要意义 和价值。本文研究了高通公司提出的 FlashLinQ 协议，该协议是一种高效的并且有 效利用空间资源的多址接入协议，相比于 RTS/CTS 机制的 CSMA/CA 机制的多址 接入协议有较大的增益。协议可以在信号覆盖范围之内实现多条链路的并行传输， 增加了网络的吞吐量，改善了网络的性能。为了验证协议的实用性，本文在 USRP （Universal Software Radio Peripheral，通用软件无线电外设）平台上实现了该协议， 结果表明协议在真实的环境中运行具有良好的性能。 关键词：分布式网络 OFDMA 技术 多址接入协议 USRP 平台 Abstract MAC (Media Access Control) protocol is also an important part of distributed network, which is a key factor that affects the performances of a network directly. With the development of technology, it has great significance and value in the networks that combine the physical layer and media access layer effectively, take good use of resources and bring the ascension of the network performance. The article studies a distributed scheduling mechanism of FlashLinQ protocol, which is proposed by Qualcomm company.The protocol is effective use of space resources and have greater gain compared with the RTS/CTS mechanism of the CSMA/CA protocol. The physical layer of the protocol use OFDMA technology and an analog signal dectecting technology to perceived channel information. With the information, a parallel transmission of multiple links can be implemented within the signal coverage. So the protocol increases the throughput and inprove the performance of the network. In order to validate the FlashLinQ protocol, it is implemented in the USRP platform，which validates that our scheme has good performance in a real environment. Keyword: Distributed networks OFDMA technology Media Access Control protocol USRP platform HYPERLINK \l _bookmark0 摘要 1 HYPERLINK \l _bookmark1 Abstract 2 HYPERLINK \l _bookmark2 目 录 1 HYPERLINK \l _bookmark3 第一章 绪论 1 HYPERLINK \l _bookmark4 1.1 研究背景 1 HYPERLINK \l _bookmark5 1.1.1 FlashLinQ 概念的介绍 1 HYPERLINK \l _bookmark6 1.1.2 分布式网络现有 MAC 协议分类 1 HYPERLINK \l _bookmark7 1.1.3 分布式网络现有接入机制的缺点 2 HYPERLINK \l _bookmark8 1.2 FlashLinQ 协议研究意义 3 HYPERLINK