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研究生:黃偉銘
研究生(外文):wei ming huang
論文名稱:超寬頻系統(UWB)鍍於展頻通訊系統中之開發研究
論文名稱(外文):The Development of UWB Systems overlay Spread Spectrum Systems
指導教授:陳雍宗陳雍宗引用關係
指導教授(外文):Joy Iong-Zong Chen
學位類別:碩士
校院名稱:大葉大學
系所名稱:電機工程學系碩士在職專班
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2007
畢業學年度:95
語文別:中文
論文頁數:56
中文關鍵詞:中上衰落通道最大比例合成多重存取干擾偏頻干擾相關係數
外文關鍵詞:Nakagami-m distributioncorrelation coefficient
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本論文探討超寬頻(ultra-wideband, UWB)鍍於展頻(spread spectrum) 通訊系統中之開發與研究,其中並假設經由通道為中上(Nakagami-m)衰落通道,並採用耙式接收機(Rake receive)於接收端,使用最大比例合成技術(maximal ratio combine, MRC)作為接收端之位元錯誤率的效能分析。一般的通訊系統,除了相加性的白色高斯雜訊(additive white Gaussian noise, AWGN),亦需考慮到多重近接干擾(multiple access interference, MAI)和偏頻干擾(partial band interference, PBI),並且考慮通道的多重路徑於都卜勒效應(Doppler effect)下所造成的相關性環境,研究分析UWB系統之效能。經由本論文的研究中,透過電腦數值分析中的發現,路徑和路徑之間的相關係數的變化確實影響著UWB系統鍍於展頻技術的系統效能。因此在系統架構的設計上,針對此一因素必須加以考量。
The performance analysis for the UWB (ultra-wideband) system overlay the spread-spectrum system is investigated in this thesis. Except the Nakagami-m statistics is applied as the channel environments scenarios, there are some conditions were considered in this paper, e.g. the MAI (multiple access interference), PBI (partial band interference) and the correlated coefficient of multi-path channels. This thesis aims on the study of channel correlation with the correlated Nakagami-m distribution. The MRC (maximal ratio combining) diversity is also adopted at the output of the receiver and there is the Rake receiver at the spread-spectrum system output. It is clear to known that the correlation can not be ignored in the consideration of the designing for a wireless communication system.
封面內頁
簽名頁
授權頁.........................iii
中文摘要........................iv
英文摘要........................v
致謝..........................vi
目錄..........................vii
圖目錄.........................x
第一章 緒論.......................1
1.1 研究動機與目的................1
1.2 論文綱要...................4
第二章 通訊通道之衰落現象.......... .....5
2.1衰落現象之介紹................5
2.2 多重路徑及多重衰落簡介........ ....6
2.3 多重路徑衰落所造成的效應.... .......7
2.4 衰落的形式分類...............7
2.4.1 小尺度衰落..............8
2.4.1.1小尺度衰落...........8
2.4.1.2 時域上的變動性.........9
2.4.2 大尺度衰落..............10
2.4.2.1 路徑損耗............11
2.4.2.2 遮蔽效應...........14
2.5衰落通道的數學模型..............15
第三章 展頻 (spread spectrum) 技術介紹..........18
3.1前言....................18
3.2 DS-CDMA系統................18
3.3 MC-CDMA系統................20
3.4多載波直序式 (MC-DS-CDMA)系統........23
3.5 Multi-tone (MT)-CDMA系統..........25
第四章 UWB系統鋪度原理.............28
4.1 MC-CDMA系統鋪設於UWB系統之介紹......28
4.2 鋪設系統之系統模式.............30
第五章 UWB系統鋪度於展頻系統之研究..........37
5.1 展頻系統發射系統模式...........37
5.2 衰落通道分布分析.............39
5.2.1 獨立Nakagami-m分布.........39
5.2.2 相關性Nakagami-m分布........41
5.3 展頻系統接收系統模式.............43
5.4 統計特性分析................44
5.4.1 系統效能分析.............45
5.5 UWB系統鋪度於MC-CDMA系統之分析.....47
5.6系統效能之數值結果與討論...........48
第六章 結論UWB系統鋪度於展頻系統之研究.......52
參考文獻.......................53
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