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研究生： 林瑋昇
Wei-Sheng Lin
論文名稱： 用於合作式無線系統之查表法相差編碼
Differential Encoding by a Look-up Table for Cooperative Wireless Systems
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 - 通訊工程學系
Department of Communication Engineering
畢業學年度： 99
語文別： 中文
論文頁數： 44
中文關鍵詞： 相差編碼 、查表法 、合作式無線系統
外文關鍵詞： look-up table, Cooperative Wireless Systems, differential encoding
相關次數： 點閱：13  下載：0 
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    • 2010年所提出查表法相差編碼在QAM可改善錯誤效能。本篇論文以此為基礎，將其運用在合作式無線系統的二種架構，架構一使用放大後傳送，在此架構下將16APSK查表法之相差編碼和16APSK傳統相差編碼比較；架構二使用分散式相差時空調變，在此架構下使用空時碼查表法之相差編碼，可避免以往相差時空調變星座圖擴展的問題，在查表法之相差編碼和架構二的比較分為放大後傳送、解碼後傳送二種方式來比較，最後把架構一和架構二在相同情況下做比較。

    Differential encoding by a table was proposed in 2010 years. Using it can effectively improve error performance in the QAM. This paper as a basis, it uses two kinds of architecture in cooperative wireless systems. First one using the amplified-and -forward transmission, in this framework will compare 16APSK differential encoding by a table with the traditional 16APSK differential encoding . Second uses distributed differential space-time modulation. In this architecture using differential space-time modulation by a table to avoid the expansion of the constellation of the transmitted signals. The differential encoding by a table compare with architecture second is divided into amplified-and-forward and decoded-and-forward two ways. Finally put two architectures in the same case for comparison.

    摘要……………………………………………………………………I Abstract………………………………………………………………II 誌謝……………………………………………………………………III 目錄……………………………………………………………………IV 圖目錄…………………………………………………………………VI 第一章 緒論…………………………………………………………1 1.1 介紹……………………………………………………………1 第二章 使用在QAM之查表法相差編碼回顧………………………3 2.1 建立差分編碼表……………………………………………3 2.1.1 符號定義…………………………………………………3 2.1.2 主要演算法………………………………………………4 2.1.3 整理群組的演算法一……………………………………6 2.2 16-QAM的相差編碼表………………………………………7 2.2.1 建立16QAM的相差編碼表…………………………………7 2.2.2 兩符號差分檢測…………………………………………12 第三章 架構一……………………………………………………13 3.1 架構一系統…………………………………………………13 3.2 架構一相差檢測……………………………………………15 3.3 架構一使用16APSK查表法…………………………………16 第四章 架構二……………………………………………………18 4.1 通道模型……………………………………………………20 4.2 傳統相差時空調變…………………………………………20 4.2.1 群組星座圖………………………………………………20 4.2.2 循環結構的差分編碼……………………………………21 4.2.3 解碼器……………………………………………………23 4.3 分散式相差時空編碼………………………………………24 4.3.1 分散式時空編碼…………………………………………24 4.3.2 分散式相差時空編碼……………………………………26 4.4 查表法分散式相差時空編碼………………………………28 4.4.1 建構差分時空調變的差分編碼表………………………28 4.4.2 以QPSK之星座圖建立的差分編碼表……………………30 4.5 架構二相差檢測……………………………………………35 4.6 模擬結果……………………………………………………36 4.7 相同條件下架構一和架構二比較…………………………40 第五章 結論………………………………………………………42 參考文獻……………………………………………………………43

    [1]R. Y. Wei,“Differential encoding by a look-up table for quadrature-amplitude modulation,”IEEE Trans. Commun., vol. 59, NO1, pp. 84-94, Jan. 2011.
    [2]R. Y. Wei and L. T. Chen,“Further Results on Differential Encoding by a Table,”sumited to IEEE Trans. Commun.
    [3]Z. Fang, L. Li, X. Bao and Z. Wang,“Generalized Differential Modulation for Amplify-and-Forward Wireless Relay Networks,”IEEE Trans.Tech, vol. 58, pp. 3058-3062, July 2009.
    [4]Y. Jing and H. Jafarkhani,“Distributed Differential Space-Time Coding for Wireless Relay Networks,”IEEE Trans. Commun., vol. 56, pp. 1092-1099, July. 2008.
    [5]R. Y. Wei, S. S. Gu and T. C. Sue,“Noncoherent block-coded TAPSK,”IEEE Trans. Commun., vol. 57, pp. 3195-3198, Nov. 2009.
    [6]B. L. Hughes,“Differential space-time modulation,”IEEE Trans. Inform. Theory, vol. 46, pp. 2567-2578, Nov. 2000.
    [7]B. M. Hochwald and W. Swelden,“Differential unitary space-time modulation,”IEEE Trans. Commun., vol. 48, pp. 2041-2052, Dec. 2000.
    [8]W. T. Webb, L. Hanzo and R. Steel,“Bandwidth efficient QAM scheme for Rayleigh fading channel,”IEE Proc. I, vol. 138, pp. 169-175, June 1991.
    [9]N. A. B. Svensson,“On differentially encoded star 16QAM with differential detection and diversity,”IEEE Trans. Veh. Technol., vol. 44, no. 3, Aug. 1995.
    [10]H. Jafarkhani,“Space-time coding: theory and practice,”Cambridge University Press, 2005.
    [11]Y. Jing and B. Hassibi, “Distributed Space-Time Coding in Wireless Relay Networks,”IEEE Trans. Commun., vol. 5, pp. 3524-3536, Dec. 2006.
    [12]T. Himsoon, W. Su and K. J. R. Liu,“Differential Transmission for Amplify-and-Forward Cooperative Communications, ”IEEE Trans. Signal Process , vol. 55, pp. 2273-2278, May 2007
    [13]T. Himsoon, W Su and K. J. R. Liu“Differential Modulation for Multi-Node Amplify-and-Forward Wireless Relay Networks,”IEEE Commun. pp. 1195-1200, 2006.

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