臺灣博碩士論文加值系統

近年來隨著通訊產業的蓬勃發展，人們對影像品質的要求日益提昇，無線傳輸應用也愈來愈多。更由於液晶顯示器的普及再加上IC 積體電路的進步及成熟，良好的影像傳輸品質已是現今生活中愈來愈不可缺少的一環。但是既要能夠遠距離傳輸仍能獲致品質良好的影像，又要能兼顧其保密性，傳統類比的無線傳輸已無法滿足此一需求。本篇論文將討論數位跳頻展頻無線傳輸技術，並對保密性、長距離無線傳輸及頻寬等技術進行討論，並呈現實際量測結果。

During the past few years of rapid development in the IT industry, the demand for new wireless applications and better image quality has increased steadily. With the proliferation of LCDs and improvement in the design of ICs, quality image transmission is quickly becoming an essential part of our daily life. But when sending images over long distances, traditional methods of wireless transmission are unable to meet the dual requirements of maintaining image quality while ensuring security of the broadcast. This paper discusses the use of Frequency Hopping Spread
Spectrum (FHSS) technology in wireless transmission,
addressing technical issues related to data security, long-distance transmission and bandwidth, and presents actual test results.

中文摘要…………………………………………………………………iii
英文摘要……………………………………………………………………iv
致謝 ……………………………………………………………………… v
目錄………………………………………………………………………… vi
圖目錄……………………………………………………………………… viii
第一章 緒論…………………………………………………………………1
1.1 研究動機與目的 …………………………………………… 1
1.2 論文大綱 ……………………………………………………4
第二章 研究內容與研究方法……………………………………………… 5
2.1 研究內容…………………………………………………………5
2.2 研究方法 …………………………………………………………6
第三章 基本原理 ……………………………………………………………7
3.1 展頻理論…………………………………………………………7
3.1.1 直接序列展頻(DSS :Direct Sequence Spread Spectrum) …………………………………………………………………………………7
3.1.2 跳頻展頻(FHSS: Frequency Hopping Spread Spectrum)………………………………………………………………………………10
3.2 2.4GHz 無線跳頻展頻模組的基本原理……………………12
3.3 2.4GHz 跳頻模模組無線通訊協定…………………………………13
第四章 實驗結果 …………………………………………………………17
4.1 發射系統方塊圖 ……………………………………………17
4.2 接收系統方塊圖 ……………………………………………18
4.3 2.4GHz跳頻模組規格 ………………………………………19
4.4 電路測試板及線路圖 ………………………………………20
4.5 軟體流程圖 …………………………………………………22
4.6 無線通訊協定及操作 ………………………………………23
4.7 測試項目 ……………………………………………………26
4.8 測試儀器 ……………………………………………………26
4.9 測試資料 ……………………………………………………27
第五章 結論 ………………………………………………………………30
參考文獻：…………………………………………………………………31
附錄A PC 端測試發射及接收圖像軟體…………………………………32
附錄B ASCII Tables and Description ………………………………35
附錄C Extended ASCII Codes……………………………………………36
圖 目 錄
FIG-1 類比2.4GHz無線影像無影像載頻傳輸頻譜 ………………………2
FIG-2 類比2.4GHz無線影像傳輸頻譜 ……………………………………3
FIG-3 Direct-sequence spread—spectrum (DS-SS) block diagrams ………………………………………………………………………………8
FIG-4 Process of spreading and dispreading. A qualitative time-domain and power-spectrum ………………………………………9
FIG-5 Frequency-hopping (FH) spread-spectrum transmitter/receiver. Basic block diagram ……………………11
FIG-6 2.4GHz 無線跳頻展頻模組的方塊圖……………………………12
FIG-7 發射系統方塊圖 …………………………………………………17
FIG-8 接收系統方塊圖 …………………………………………………18
FIG-9A 電路線路圖 ………………………………………………………20
FIG-9B 電路測試板 ……………………………………………………20
FIG-10 軟體流程圖 ………………………………………………………22
FIG-11 數位 2.4GHz無線展頻跳頻傳輸頻譜 …………………………27
FIG-12 數位2.4GHz無線展頻跳頻跳頻表 ………………………………28
FIG-13 數位 2.4GHz無線展頻跳頻模組資料傳輸圖……………………28
FIG-14 數位 2.4GHz無線展頻跳頻模組資料傳輸模式…………………29
FIG-15 PC 在發射端測試軟體所發射圖像軟體…………………………32
FIG-16 PC 在接收端測試軟體所接收圖像………………………………33
FIG-17 DATA SCOPE 在接收端接收圖資料………………………………34

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