基于NRF905的无线呼叫系统设计与实现
关键词：无线呼叫系统；RFID；NRF905；STC89C52RC；碰撞检测；
Design of Wireless Calling System Based on NRF905
Abstract: With the development of RFID (radio frequency identification) technology and the improvement of people's living standards, wireless calling system is more and more popular in recent years. Because of the low-cost, low power consumption and information processing characteristics, it is quickly applied to so many fields. It also has a good prospect. This topic introduces the wireless calling system built based on RFID technology, microelectronic technology, information and communication technology to achieve wireless calling system using STC89C52RC micro controller and NRF905 wireless transmission module architecture. After completed the design of hardware and software, the slash ALOHA protocol with Carrier Sense is put forward to solve the problem of data collision. And then introduce frequency hopping which is used to ensure the transmission, the design of low-power system which make the calling system run longer and interference cancellation to ensure the system can run normally. I believe that with the changing lifestyles and social life of information technology, wireless calling system will be developed in more fields.
Keywords: Wireless Calling System; RFID; RNF905; STC89C52RC; Collision Detection;
目录
摘要 ii
Abstract. ii
目录 iii
1 绪论 1
1.1 国内外现状 1
1.2 研究背景和意义 2
1.3 论文的组织结构 3
2 技术背景 4
2.1 射频识别技术的基本概念和介绍 4
2.1.1 射频识别技术的基本概念 4
2.1.2 RFID技术优势 5
2.1.3 RFID技术应用领域 5
2.2 RFID无线呼叫系统模型 6
2.2.1 信源编码 6
2.2.2 信道编码 7
2.2.3 调制与解调 7
2.3 现有防碰撞协议介绍 7
2.3.1 空分多路法（SDMA） 8
2.3.2 频分多路法（FDMA） 8
2.3.3 时分多路法（TDMA） 8
2.3.4 码分多路法（CDMA） 8
2.4 本章小结 9
3 无线呼叫系统设计基本内容 10
3.1 无线呼叫系统基本结构和功能 10
3.2 RFID无线呼叫系统模块划分 11
3.2.1 模块总体划分 11
3.2.2 各个模块分析 11
3.3 系统设计基本方案要求 12
3.4 无线呼叫系统硬件设计思路 12
3.5 无线呼叫系统软件设计思路 13
3.6 选用硬件介绍与环境搭建 14