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研究生:梁瑋諭
研究生(外文):Liang, Weiyu
論文名稱:相關性通道下考慮直行連結之放大轉發式MIMO多中繼合作式通訊系統聯合收發機設計
論文名稱(外文):MMSE-Based Transceiver Design For Distributed MIMO AF Cooperative Networks In Correlated Channels
指導教授:胡家彰
指導教授(外文):Hu, Chiachang
口試委員:胡家彰陳喬恩劉宗憲張名先
口試委員(外文):Hu, ChiachangChen, ChiaoenLiu, TsunghsienChang, Mingxian
口試日期:2012-07-25
學位類別:碩士
校院名稱:國立中正大學
系所名稱:通訊工程研究所
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:2012
畢業學年度:100
語文別:中文
論文頁數:71
中文關鍵詞:放大轉發式相關性通道直行連結多輸入多輸出最小均方誤差多中繼節點預編碼器
外文關鍵詞:Amplify-and-forward (AF)correlated channeldirect linkMIMOMMSEprecoder
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本文考慮在相關性通道情況下放大轉發 (amplify-and-forward, AF) 多重輸入多重輸出(multiple-input multiple-output, MIMO)多中繼(multiple relays)合作式通訊(cooperative communication)系統之聯合收發機設計,並加入來源端直行連結傳輸至目的端之路徑(source-destination link or direct link)於系統中。統合來源端預編碼器(precoder)與多中繼站加權(weighting)矩陣以及目的端解碼器(decoder)之設計制定成一最佳化的問題。基於最小均方誤差(minimum mean-square error, MMSE)準則聯合處理解碼矩陣及合併使用非線性矩陣形式共軛梯度法(nonlinear matrix-form conjugate gradient, MCG)搜尋區域最佳預編碼器以及各中繼加權矩陣。最後,電腦模擬結果驗證有考慮直行連結路徑的合作式通訊系統設計比沒有考慮直行連結路徑的設計表現來得優異。
In the paper, the source-precoder, multiple-relay amplifying matrices, and destination-equalizer combined optimization is investigated in distributed multiple-input multiple-output (MIMO) amplify-and-forward (AF) multi-relay networks with direct source-destination transmission in correlated fading channels. With the use of taking both the direct link (DL) and spatial correlation between antenna elements into account, the cooperative transceiver joint design is developed based on the minimum mean-squared error (MMSE) criterion under individual power constraints at the source and multiple-relay nodes. The optimization problem of the cooperative transceiver joint design is neither concave nor convex so that a nonlinear matrix-form conjugate gradient (MCG) algorithm is applied to explore local optimal solutions. Simulation results demonstrate that the cooperative transceiver joint design architecture for an AF-MIMO multiple-relay system outperforms substantially the non-cooperative transceiver design techniques on the bit-error-rate (BER) performance under the correlated fading channels.
中文摘要 i
英文摘要 ii
目錄 iii
圖目錄 v
表目錄 vii
第一章 導論 1
1.1 前言 1
1.2 研究動機 3
1.3 論文架構 4
第二章 無線中繼通訊系統 5
2.1 合作式通訊基本概念 5
2.2 放大轉發式中繼對策 7
2.3 解碼轉發式中繼對策 8
2.4 預編碼技術 9
2.4.1 傳統MIMO系統 9
2.4.2 放大轉發式MIMO中繼系統 12
第三章 考慮直行連結之放大轉發式MIMO多中繼通訊系統 14
3.1 系統模型 14
3.2 空間相關性衰減通道模型 18
3.2.1 康瑞克模型簡介 18
3.2.2 康瑞克模型推導 18
3.3 完整通道模型 20
第四章 MMSE聯合處理收發機設計 21
4.1 原理 21
4.2 聯合收發機設計 22
4.3 其他波束成型技術 28
4.3.1 匹配濾波器 28
4.3.2 最小均方誤差濾波器 29
4.4 推導和證明 30
4.4.1 推導(4.4)-(4.5)式 30
4.4.2 推導(4.14)式 32
4.4.3 推導(4.23)式 34
第五章 疊代演算法 36
5.1 梯度下降法(GD) 36
5.2 共軛梯度法(CG) 38
5.2.1 線性共軛梯度法 38
5.2.2 共軛性 39
5.2.3 非線性共軛梯度法 45
第六章 電腦模擬與分析 47
6.1 電腦模擬環境參數設定 47
6.2 模擬圖分析 48
6.2.1 不同中繼節點個數的模擬與分析 48
6.2.2 不同天線個數的模擬與分析 50
6.2.3 不同相關係數的模擬與分析 52
6.2.4 不同中繼節點加權矩陣設計的模擬與分析 54
6.2.5 GD與nonlinear MCG的收斂比較 57
第七章 結論與未來展望 59
參考文獻 60

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