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系統識別號 U0002-0906201015482700
中文論文名稱 基於MIMO之輔助天線與多樣性編碼調變系統設計及分析
英文論文名稱 Design and analysis of coding diversity and modulating diversity in the MIMO system using auxiliary antenna
校院名稱 淡江大學
系所名稱(中) 電機工程學系碩士班
系所名稱(英) Department of Electrical Engineering
學年度 98
學期 2
出版年 99
研究生中文姓名 程士豪
研究生英文姓名 Shih-Hao Cheng
學號 697440179
學位類別 碩士
語文別 中文
口試日期 2010-05-24
論文頁數 41頁
口試委員 指導教授-李揚漢
委員-李揚漢
委員-曹痚
委員-詹益光
委員-吳榮厚
委員-劉茂陽
中文關鍵字 多輸入多輸出  空時區塊碼  可調製散射天線陣列  分集編碼  分集調變 
英文關鍵字 Multiple-Input Multiple-Output (MIMO)  Space-Time Block Code(STBC)  Modulated scattering antenna array(MSAA)  coding diversity  modulating diversity 
學科別分類 學科別應用科學電機及電子
中文摘要 近年來,無線通訊系統有許多關於MIMO的研究,因為MIMO具有高頻譜效益。然而,欲在行動設備上放置多天線會有一些問題,例如空間大小有限。MSAA是一種多天線陣列技術,其在無線通訊設備接收端包含了主要接收天線與MSE天線,其中MSE天線並無RF接收電路,因此可以節省多天線陣列所需的空間。
本論文中,以Alamonti空時碼(Space-Time Code)推廣至四根傳送天線的空時方塊碼(Space-Time Block Code)作為基礎MIMO系統。系統的傳送端包含四根正常的傳送天線,而在接收端使用四根接收天線,其中包含兩根正常的接收天線與兩根輔助天線,這兩根輔助天線如同MSAA中的MSE天線,其並無RF電路。在系統設計中,考慮輔助天線是否改變訊號頻率,並分析是否改變訊號頻率的效能。最後設計分集編碼與分集調變系統,用來提高輔助天線系統的增益。
英文摘要 With the development of multiple-input and multiple-output (MIMO) communication system it still has the problem of implement multi-antenna system on the mobile set it is due to the limited space available on the mobile set. In the Modulated Scattering Antenna Array (MSAA) system at the receiver side it consists of one normal antenna and several modulated scattering elements (MSEs) withonly one RF circuit is fabricated to attain the MIMO advantages.
In this study we consider an MIMO communication system based on space-time code (STC). In this system it is implemented with four transmitter antenna which have the normal antenna architecture while at the receiver side it is implemented withtwo regular antenna and two auxiliary antennas thatare designed based on the concept of the MSAA technique without any feasible RF circuits implemented. The characteristics and performance of system are studied extensively when the carrier frequencies at the auxiliary antenna are fixed or ‘scanning’. Various diversities based on coding techniques and/or modulating methods are also considered in the system performance evaluation. It reveals that with this auxiliary antenna design at the receiver side it can attain the advantages of MIMO system while reducing the required antenna space and eliminating the complexities of RF circuits design.
論文目次 目錄
第一章 緒論…………………………………………..…1
1.1 前言…………………………………………………………...1
1.2 研究動機………………………………………..........................2
第二章 輔助天線系統…………………………………..4
2.1 MIMO簡介……………………………………………………….4
2.1.1 空時區塊碼………………………………………………...5
2.2 輔助天線…………………………………………………….……6
2.2.1 MSAA……………………………………………………….7
2.2.2 輔助天線系統設計……………………...............................9
2.2.2.1 增加接收功率型系統…………………………………10
2.2.2.2 增加接收分集型系統…………………………………..13
第三章 分集編碼系統…………………………………17
3.1 迴旋碼……………………………………………………...……17
3.2 一般型式系統……………………………………………...……18
3.3 分集編碼系統設計………………………………………...……19
第四章 分集調變系統…………………………………26
4.1 分集調變系統設計……………………………………………26
4.2分集調變特殊型設計……………………………..……………...29
第五章 結論與未來展望………………………………32
5.1 結論……………………………………….……………………..32
5.2 未來展望…………………………...……………………………33
參考文獻………………………………………………..37

圖目錄
圖1.1 MSAA示意圖……………………………………………………....2
圖1.2 主天線與輔助天線不同接收功率示意圖. ……………………….3
圖2.1 空間多工示意圖…………………………………………………...4
圖2.2 傳輸分集示意圖. ………………………………………………….5
圖2.3 STBC傳送端四根天線架構圖.. …………………………………...5
圖2.4 STBC傳送端四根天線複數編碼.. ………………………………...6
圖2.5 二傳一收MISO添加一根輔助天線接收示意圖…………………7
圖2.6 MSAA示意圖……………………………………………………....8
圖2.7 MSAA接收功率.. ………………………………………………….9
圖2.8 主天線與輔助天線不同接收功率示意圖. ……………………10
圖2.9 輔助天線增加些收功率系統示意圖.. …………………………..11
圖2.10 輔助天線增加接收功率系統模擬圖.. …………………………11
圖2.11輔助天線增加接收分集系統示意圖. …………………………...13
圖2.12 輔助天線增加接收分集系統模擬圖.. …………………………14
圖2.13 一傳一收SISO系統添加一根輔助天線示意圖.. ……………...15
圖3.1 (2,1,2)迴旋碼編碼器.. …………………………………………….17
圖3.2 一般型MIMO系統架構圖.. ……………………………………..18
圖3.3(a) 分集編碼傳輸端架構圖.. ……………………………………..20
圖3.3(b)分集編碼接收端架構圖.. ………………………………………21
圖3.4分集編碼模擬圖. ………………………………………………….22
圖4.1(a) 分集調變傳輸端架構圖…………………………………….....26
圖4.1(b) 分集調變接收端架構圖.. ……………………………………..27
圖4.2 分集調變模擬圖.. ………………………………………………..27
圖4.3 64QAM星座圖.. …………………………………………………..30
圖4.4 分集調變特殊設計模擬圖.. ……………………………………..31
圖5.1 多基頻和多射頻電路於多天線陣列架構圖……………………35
圖5.2 多基頻和共射頻電路於多天線陣列示意圖……………………35
圖5.3 共基頻和共射頻電路於多天線陣列示意圖……………………36

表目錄
表3.1 四傳二收與四傳四收MIMO模擬結果(BER=10^-3)……….….19
表3.2 分集編碼模擬結果(QPSK).. …………………………………….23
表3.3 分集編碼模擬結果(16QAM).. …………………………………..24
表3.4 分集編碼模擬結果(64QAM).. …………………………………..25
表4.1 分集調變模擬結果(rate=1/2).. …………………………………..28
表4.2 分集調變模擬結果(rate=2/3) .. ………………………………….28
表4.3 分集調變模擬結果(rate=3/4) .. ………………………………….29
表5.1 分集編碼與分集調變比較.. ……………………………………..32
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