便携式高清晰数字无线监控系统――接收单元硬件设计

测控论文编号:CK094   论文字数:15075,页数:41

目 录
摘要…………………………………………………………………………...………………….I
绪论…………………………………………………………………………...……………..1
监控系统原理…………………………………………………………………………...…3
2.1 系统原理概述……………………………………………………………………………3
2.2 系统主要技术简介……………………………………………………………………....4
2.3 系统主要优势…………………………………………………………………………....5
高清图像传输系统总体设计…………………………………………………………....8
 3.1系统主要技术指标……………………………………………………………………....8
 3.2系统构成…………………………………………………………………………...…….9
3.2.1音视频信号源单元……………………………………………………………….9
3.2.2编码单元…………………………………………………………………………10
3.2.3发射单元…………………………………………………………………………11
3.2.4接收单元…………………………………………………………………………13
 3.2.5解码单元…………………………………………………………………………13
 3.2.6视频显示单元……………………………………………………………………14
4  高清图像传输接收单元硬件设计……………………………………………………..15
4.1 信号接收单元设计要求………………………………………………………………...15
4.2 信号接收单元总体设计方案…………………………………………………………...15
 4.2.1 软件设计路线……………………………………………………………………15
 4.2.2 硬件设计路线……………………………………………………………………18
4.3 主要芯片的选择及说明…………………………………………………………………19
4.4 接收单元系统结构及电路原理设计……………………………………………………23
 4.4.1 射频芯片组…………………………………………………………………….....23
 4.4.2  基带芯片组………………………………………………………………………24
 4.4.3 电源单元………………………………………………………………………….27
5  总结…………………………………………………………………………............28
致谢…………………………………………………………………………...…………………..29
参考文献…………………………………………………………………………...……………30
附录1 基带处理器引脚描述………………………………………………………………..31

摘 要
 当前，从我国应用的无线监控系统来看，高清晰度的无线视频监控系统几乎没有，所有在用的无线监控系统，其系统传输图像质量往往不太好，“马赛克”图像时常发生，并且不稳定。其次是图像清晰度差，往往只看清楚图像中人的形体和动作，却不能看清楚人的脸形等。所以，开发研制高清晰度的无线视频监控系统很有必要！
 本次系统总体设计，旨在完成一个易于组网的局域无线监控系统，且希望该系统能够实现标清数据的实时、高速传输。并且具备较强的抗干扰能力以及较为广阔的的监控范围。而本次毕业设计主要完成的内容是接收单元的硬件设计。要求其设计应与系统的总体设计相匹配，且兼容其软件功能。

关键词:无线传输;监控;调制解调;
Abstract
 Now, applications from China's wireless monitoring system, high-definition wireless video surveillance system virtually is non-existent. With all the wireless monitoring system, the system transfers the image quality is often not very good.The "mosaic" images from time to time occur and instability. Followed by the poor image definition, often only look at images of human forms and movements, but can not see the face of such people. Therefore, the development of high-definition wireless video surveillance system is very necessary!
 The system is easy to complete a design aimed at the local wireless network monitoring systems, and hope that the system can achieve a standard definition of data in real time, high-speed transmission. And the graduation project is the main content of the completion of the hardware design of the receiving unit. Requirements and systems should be designed to match the overall design and function compatible with its software.
 
Keywords:   Wireless transmission; Monitoring; modulation and demodulation