文档介绍：定向通信装置设计与制作
摘要
本系统设计的是一个基于红外传输的定向无线通信装置。此装置以红外线为传输媒介通过对红外线进行频率调制,实现了模拟语音信号和数字信号的定向传输。此装置实现的功能有语音信号的传输,温度、时间等数字量的实时发送,且还能传送文字图形等消息。此装置的最大通信距离可达2m,最大距离处误码率低至10-4,语音信号无明显失真;;且功耗低。
本系统的创新点是在同一信道上,能同时传输模拟信号和数字信号;另外此系统还增设了红外中继转发节点,已实现对信号传输方向的定向改变以及延长红外通信距离,解决了传统红外通信视距传播的缺点。
关键词:红外传输;频率调制;定向通信;中继转发;
Abstract
The system design is based on a directional munication devices infrared transmission. This device is an infrared transmission medium by infrared frequency modulation, the analog voice signal and directional transmission of digital signals. The function of this device to achieve transfer, temperature, time, etc. The real-time digital signal transmitting voice and graphics, but also send text messages. This means the munication distance up to 3m, the maximum distance error rate to 10-4, the speech signal without significant distortion; data transfer rate / s or more; and low power consumption.
     The innovation of this system is the same channel that can transmit both analog and digital signals; addition, this system also added an infrared relaying node, has achieved the directional change of direction and extending the signal transmission distance munication to solve the traditional munication sight propagation ings.
Keywords: infrared transmission; frequency modulation; munication; relaying;
目录
1 绪论 1
引言 1
1
2
2 系统方案设计 3
总体方案设计 3
技术指标 3
系统工作原理 4
3 硬件设计与实现 5
红外发射部分 5
语音信号的调制原理 5
语音信号的调制电路设计 6
数字信号的调制原理 7
数字信号的调制电路设计 8
温度采集电路的设计 8
时钟电路的设计 9
红外接收部分 10
10
FM信号的解调原理 11
FM信号的解调电路设计 12
2FSK信号的解调原理 13
2FSK信号的解调电路设计 14
液晶显示电路 15
中继转发节点部分 16
中继转发节点电路设计 16
4 软件设计 18
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红外发射程序流程图 18
信道编码及红外发送子程序 19
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红外接收及解码子程序 21
5 电路测试及结果分析 22
问题分析与解决 22
模拟信号的测试 22
数字信号的测试 23
数据记录 23
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