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研究生： 黃彰智
Chang-Chih Haung
論文名稱： 多層次時空編碼
Multilevel Space-time Codes
指導教授： 魏瑞益
Ruey-Yi Wei
口試委員:
學位類別： 碩士
Master
系所名稱： 資訊電機學院 - 電機工程學系
Department of Electrical Engineering
畢業學年度： 90
語文別： 中文
論文頁數： 82
中文關鍵詞： 時空編碼 、多層次編碼 、多級解碼 、多樣性 、行列式值 、訊號星座圖 、符號標記法 、傳輸率 、錯誤率效能
外文關鍵詞： Space-time coding, multilevel coding, multistage decoding, diversity, determinant, signal constellation, labeling
相關次數： 點閱：12  下載：0 
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    • 論文摘要
    本論文針對時空籬柵編碼，擬以多層次編碼（multilevel coding）技術來降低其複雜度，第三章以全多樣性（full diversity）之時空編碼為主題，採用[4]中的一個碼，來設計三個傳送天線的時空區塊編碼，並改變星座圖的符號標記法（labeling），以計算時空碼的行列式值（determinant）的方式，研究符號標記法與錯誤率效能的關係，並以此架構轉換成一時空籬柵編碼的架構，試圖找出除了延遲多樣性架構之外，設計時空籬柵編碼的準則。
    第四章以非全多樣性的時空編碼為出發點，觀察在增加傳輸率的同時，相較於時空籬柵編碼錯誤率效能的下降幅度，研究其原因，並研擬改進的方法。

    This thesis is aimed at space-time trellis coding, using multilevel coding technology to decrease complexity. Chapter 3 focuses on full diversity space-time codes, using a code in [4] to design a space-time block code which has three transmission antennas. We try to change signal labeling and calculate　determinant in order to research error performance and transform this structure to a type of space-time trellis codes. Try to find a design method to construct space-time trellis codes instead of delay diversity scheme.
    Chapter 4 focuses on non-full diversity space-time codes which increase transmission rate and reduction of observe error performance. We also compare with space-time trellis coding in order to obtain more insights and improve its error performance.

    第一章 緒論 1 1.1 時空編碼簡介.........................................................1 1.2 多重路徑衰退.........................................................3 1.3 研究動機.............................................................4 第二章 時空編碼系統分析與建構 5 2.1 系統模型.............................................................5 2.2 時空編碼的錯誤率分析及建構準則........................9 2.3 傳輸率、多樣性、籬柵複雜度的取捨....................15 2.4 計算與設計實例......................................................17 第三章 最大多樣性多層次時空編碼 21 3.1 多層次編碼..........................................................21 3.2 一種8-PSK多層次時空編碼.....................................24 3.3 變換星座圖符號對時空編碼的影響.........................29 3.4 8-PSK多層次時空編碼改良.....................................34 第四章 非最大多樣性多層次時空編碼 42 4.1 傳輸率為5的多層次時空編碼...............................42 4.2 傳輸率為6的多層次時空編碼...............................47 4.3 以碼搜尋方式改進錯誤率效能...............................50 4.4 其他改進方法及與時空籬柵編碼的比較...............59 第五章 結論

    參考文獻
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