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研究生： 陽湘安
Hsiang-An Yang
論文名稱： LTE下行鏈路系統之通道估測與等化
Channel Estimation and Equalization for LTE Downlink System
指導教授： 陳逸民 博士
口試委員:
學位類別： 碩士
Master
系所名稱： 資訊電機學院 - 通訊工程學系在職專班
Executive Master of Communication Engineering
論文出版年： 2016
畢業學年度： 104
語文別： 中文
論文頁數： 88
中文關鍵詞： 長期演進技術 、正交分頻多工 、空頻區塊碼 、空間通道模型 、可加性白色高斯雜訊 、多輸入多輸出
外文關鍵詞： LTE/LTEA, OFDM, SFBC, SCM, AWGN, MIMO
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    • 本論文介紹了正交分頻多工技術（Orthogonal Frequency Division Multiplexing，OFDM）的流程、多天線分集技術之空頻區塊碼（Space Frequency Block Code，SFBC）的編碼方式、LTE/LTE-A下行鏈路系統簡介、通道與空間通道模型（Spatial Channel Model，SCM）、可加性白色高斯雜訊（Additive White Gaussian Noise，AWGN）、通道估測與等化技術，並參考LTE/LTE-A下行鏈路系統的規格來進行通道的估測與等化，比較幾種不同的通道估測技術在不同的通道中與不同的天線數量下的性能評比。

    This thesis introduces the orthogonal frequency division multiplexing technology、space frequency block code、LTE/LTE-A downlink system、spatial channel model、additive white gaussian noise、channel estimation and equalization，and reference to LTE/LTE-A downlink system specifications for channel estimation and equalization，compared the performance of different channel estimation techniques for different channels and different number of antennas。

    第一章 緒論 .............................................1 1.1 簡介 ............................................... 1 1.2 章節提要 ............................................ 1 第二章 正交分頻多工技術與多天線分集技術簡介 .................. 3 2.1 正交分頻多工技術簡介 .................................. 3 2.1.1 調變 ........................................... 4 2.1.2 串列和並行 ...................................... 5 2.1.3 IFFT和FFT ...................................... 5 2.1.4 保護區間和循環字首 ................................ 6 2.2 多天線分集技術簡介 .................................... 8 第三章 LTE/LTE-A下行鏈路系統簡介 ......................... 12 3.1 傳輸資源結構 ........................................ 12 3.2 實體層下行通道與訊號 ................................. 17 3.3 實體層下行鏈路 ...................................... 19 3.4 下行鏈路傳輸參數與通道模型參數 ......................... 24 第四章 通道估測與等化 ................................... 26 4.1 通道簡介 ........................................... 26 4.2 可加性白色高斯雜訊 ................................... 31 4.3 通道估測與等化 ...................................... 32 4.3.1 頻域上線性內插之通道估測 .......................... 32 4.3.2 頻域上三次多項式內插之通道估測 ..................... 34 4.3.3 頻域上Pilot位置的二次多項式曲線擬合之通道估測 ........ 35 4.3.4 時域上符元平均之通道估測 .......................... 36 4.3.5 頻域上零値逼近法之通道等化 ........................ 36 第五章 模擬結果與分析 ................................... 37 5.1 一發射天線與一接收天線 ............................... 38 5.2 双發射天線與一接收天線 ............................... 44 5.3 双發射天線與双接收天線 ............................... 58 第六章 結論與展望 ...................................... 72 參考文獻 ............................................... 73

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