ZigBee技术物理层传输技术的研究与实现-通信与信息系统专业论文.docx

摘要 摘要 万方数据 万方数据 摘 要 ZigBee 无线技术是一种新兴的无线传感技术，因其短距离传输、低功耗、低 速率、低成本等显著特点，引起广泛关注。随着 IT 行业快速的发展和单片机集成 处理速度的提高，ZigBee 无线传感技术将在无线传感网络中扮演一个重要的角 色。近年来，在国内外关于 ZigBee 技术的研究已有很多，但是 ZigBee 物理层实现 的论文却不多见。很多应用开发都是用到厂商做好 ZigBee 芯片开发调试。 本文是在前人研究的的基础上，借助软件无线电开发平台(Soft Defined Radio Development Platform,SDR DP)实现 ZigBee 技术的物理层系统。 本文的工作主要可以分为三个部分，一是对 ZigBee 协议规范做简要叙述,引 出物理层系统基带处理的结构，然后详细分析，得出多进制奇偶相关解扩解调的 方法。二是在基于 matlab 的 simulink 环境下对 ZigBee 物理层系统仿真，与理论性 能作比较后得出加入编码来提高误码率性能，在误码率为10?5 的时候，编码增益约 3dB。然后对系统性能进行定点仿真，给平台上的实现提供量化参考。浮点仿真性 能和理论性能吻合，定点仿真性能和浮点仿真性能很接近。三是实现部分，首先 完成了基带、中频和射频的自环链路，在此基础上完成了收发分开链路，并且进 行了性能测试，工作期间分析和解决了实现上资源优化、比特量化、时序控制等 关键问题。测试结果与定点仿真性能做了比较分析，中频性能比定点仿真性能差 约 0.7dB，射频则差 1.3dB 左右。 关键词：ZigBee，扩频，滤波成型，奇偶相关 I Abstract Abstract Abstract ZigBee wireless technology is a new type of wireless sensor technology because its short transmission, low power consumption, low rate, low cost and other characteristics, aroused widespread concern. With the rapid development of IT industry and single-chip microcomputer integrated processing speed increase, ZigBee wireless sensing technology in wireless sensor network will play an important role. In recent years,a lot of researches about ZigBee have been done in domesticand and at home, however,there are few papers which are about the realization of the physical ZigBee. Many application developments are used to ZigBee chip manufacturer development of commissioning. In this paper, the physical ZigBee will be realized on the previous research with Soft Defined Radio Development Platform (SDR DP) . The main work in this thesis can be divided into three parts,First briefly described ZigBee protocol specification,and leads to the structure of physical layer system,then analysis it in detail and get the demodulation method；Second, perform the simulation of ZigBee physical layer, and compare with the theoretical performance .In ordor to improve the BER performance, adding code.When the bit error rate reach  10?5 , encoding gai