便攜式高清晰數字無線監控系統――接收單元硬件設計

測控論文編號:CK094   論文字數:15075,頁數:41

目 錄
摘要…………………………………………………………………………...………………….I
緒論…………………………………………………………………………...……………..1
監控系統原理…………………………………………………………………………...…3
2.1 系統原理概述……………………………………………………………………………3
2.2 系統主要技術簡介……………………………………………………………………....4
2.3 系統主要優勢…………………………………………………………………………....5
高清圖像傳輸系統總體設計…………………………………………………………....8
 3.1系統主要技術指標……………………………………………………………………....8
 3.2系統構成…………………………………………………………………………...…….9
3.2.1音視頻信號源單元……………………………………………………………….9
3.2.2編碼單元…………………………………………………………………………10
3.2.3發射單元…………………………………………………………………………11
3.2.4接收單元…………………………………………………………………………13
 3.2.5解碼單元…………………………………………………………………………13
 3.2.6視頻顯示單元……………………………………………………………………14
4  高清圖像傳輸接收單元硬件設計……………………………………………………..15
4.1 信號接收單元設計要求………………………………………………………………...15
4.2 信號接收單元總體設計方案…………………………………………………………...15
 4.2.1 軟件設計路線……………………………………………………………………15
 4.2.2 硬件設計路線……………………………………………………………………18
4.3 主要芯片的選擇及說明…………………………………………………………………19
4.4 接收單元系統結構及電路原理設計……………………………………………………23
 4.4.1 射頻芯片組…………………………………………………………………….....23
 4.4.2  基帶芯片組………………………………………………………………………24
 4.4.3 電源單元………………………………………………………………………….27
5  總結…………………………………………………………………………............28
致謝…………………………………………………………………………...…………………..29
參考文獻…………………………………………………………………………...……………30
附錄1 基帶處理器引腳描述………………………………………………………………..31

摘 要
 當前，從我國應用的無線監控系統來看，高清晰度的無線視頻監控系統幾乎沒有，所有在用的無線監控系統，其系統傳輸圖像質量往往不太好，“馬賽克”圖像時常發生，并且不穩定。其次是圖像清晰度差，往往只看清楚圖像中人的形體和動作，卻不能看清楚人的臉形等。所以，開發研制高清晰度的無線視頻監控系統很有必要！
 本次系統總體設計，旨在完成一個易于組網的局域無線監控系統，且希望該系統能夠實現標清數據的實時、高速傳輸。并且具備較強的抗干擾能力以及較為廣闊的的監控范圍。而本次畢業設計主要完成的內容是接收單元的硬件設計。要求其設計應與系統的總體設計相匹配，且兼容其軟件功能。

關鍵詞:無線傳輸;監控;調制解調;
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