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 在本篇論文中，我們提出三種正交分頻多工系統結合具有低複雜度之部分傳輸序列的方法，來降低正交分頻多工系統的峰均功率比。在部分傳輸序列中，隨著子區塊的增加，降低峰均功率比的效果也越好，但複雜度則卻是呈現指數成長。第一種降低複雜度的方法為透過疊代的方式，由前次得到的資訊來得到更好的效果，故可以用較少的子區塊來得到相同的效果；第二種方法則是結合了修改型樹狀結構的部分傳輸序列，使得複雜度比樹狀結構更為降低；最後一種方法，則是結合了法諾演算法使得並列型式的樹狀結構改為串列型式的樹狀結構，並加入臨界值判斷，使得複雜度下降，且降低正交分頻多工系統的峰均功率比。
 In this paper, we proposed three methods of orthogonal frequency division multiplexing (OFDM) system combined partial transmit sequence (PTS) with low complexity. In the PTS, as sub-blocks increase, the performance of reducing peak-to-average power ratio (PAPR) is getting better, but complexity grow exponentially.The first method is to reduce the complexity of PTS by iteration, and uses the information obtained from last time to get better performance, so it can use less sub-blocks to get the same performance as PTS .The second method is to reduce much complexity by modified tree structure than RC-PTS. The last is to reduce complexity of tree structure by Fano algorithm, and changes the parallel form of tree structure into series form. In this method, we also add the threshold to let complexity lower.
 Chapter 1 前言………………1Chapter 2 簡介………………3　　2.1 正交分頻多工系統………………3　　2.2 峰均功率比值………………7　　2.3 部分傳輸序列………………10　　2.4 樹狀結構………………18Chapter 3 結合疊代型及修改型樹狀結構之PTS………………25　　3.1 疊代型部分傳輸序列………………25　　3.2 修改型樹狀結構………………31　　3.3 結合法諾演算法與樹狀結構之部分傳輸序列………………343.3.1 ZJ 演算法………………343.3.2 法諾演算法(Fano Algorithm)………………393.3.3 修改型法諾演算法與樹狀結構結合之部分傳輸序列………………41Chapter 4 模擬結果與討論………………48　　4.1 疊代型部分傳輸序列………………49　　4.2 修改型樹狀結構………………52　　4.3 結合法諾演算法與樹狀結構………………57Chapter 5　結論………………60參考文獻 ………………61
 [1].S. H. Han and J. H. Siu, “An Overview of Peak-to-Average Power Ratio Reduction on Technique for Multicarrier Transmission,” IEEE Wireless Commun., vol. 12, issue. 2, pp. 56-65, Apr. 2005.[2].H. B. Jeon, J. S. No, “A Low-Complexity SLM Scheme Using Additive Mapping Sequences for PAPR Reduction of OFDM Signals”, IEEE Trans. Broadcast., vol. 57, no. 4, pp. 866-875 , Dec. 2011.[3].C. P. Li, S. H. Wang, and C. L. Wang, “Novel Low-Complexity SLM Schemes for PAPR Reduction in OFDM Systems”, IEEE Trans. Signal Process., vol. 58, no. 5, pp. 2916-2921, May 2010.[4].L. Wang and J. Liu, “PAPR Reduction of OFDM Signals by PTS With Grouping and Recursive Phase Weighting Methods”, IEEE Trans. Broadcast., vol. 57, no. 2, pp. 299-306, Jun. 2011.[5].L. Yang, K. K. Soo, S. Q. Li, and Y. M. Siu, “PAPR Reduction Using Low Complexity PTS to Construct of OFDM Signals Without Side Information”, IEEE Trans. Broadcast., vol. 57, no. 2, pp. 284-290 , Jun. 2011.[6].L. Yang, R. S. Chen, Y. M. Siu, and K. K. Soo, “PAPR Reduction of an OFDM Signal by Use of PTS with Low Computational Complexity”, IEEE Trans. Broadcast., vol. 52, no. 1, pp. 83-86, Mar. 2006.[7].S. J. Ku, C. L. Wang and C. H. Chen, “A Reduced-Complexity PTS-Based PAPR Reduction Scheme for OFDM Systems”, IEEE Trans. Wireless Comm., vol. 9, no. 8, pp. 2455-2460, Aug. 2010.[8].Li Li and D. Qu, “Joint Decoding of LDPC Code and Phase Factors for OFDM Systems With PTS PAPR Reduction”, IEEE Trans. Vehicular Tech., vol. 62, no. 1, pp. 444-449, Jan. 2013[9].D. W. Lim, S. J. Heo, J. S. No, and H. Chung, “A New PTS OFDM Scheme with Low Complexity for PAPR Reduction”, IEEE Trans. Broadcast., vol. 52, no. 1, pp. 77-82, Mar. 2006.[10].Shu Lin et Daniel J. Costello, “Suboptimum Decoding of Convolutional Codes,” Error Control Coding, 2th ed., Pearson-Prentice Hall, 2004, ch. 13, sec. 1-2, pp. 606-626.
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 1 以格雷序列與非格雷序列降低OFDM訊號之峰均比 2 改良型基因演算法─部份傳輸序列技術降低正交分頻多工系統之峰均功率比值 3 以訊號扭曲法改善正交分頻多工訊號之非線性容忍度 4 改善相位轉向技術與頻道保留技術之研究 5 OFDM系統下利用疊加完美序列之半盲式通道估測 6 正交分頻多工系統的子載波間干擾消除與降低功率峰均值比之研究 7 結合降低峰均功率比技術與多項式預扭器技術之效能分析 8 應用於M-QAM正交分頻多工系統的改良型非互斥分割部份傳輸序列技術 9 正交分頻多工系統中降低功率峰均值比之星狀點整型選擇性映射技術研究 10 CE-OFDM-PM系統的效能分析與改進 11 在OFDM系統中考慮功率放大器效率下透明序列技術功率分配之研究 12 線性相位變化降低正交分頻多工訊號功率峰均比 13 降低正交分頻多工系統與正交分頻多工─分碼多工擷取系統之峰值對平均功率比 14 探討改善LED非線性轉換特性對DCO-OFDM訊號之影響的方法 15 改良式部分傳輸序列技術用於降低正交分頻多工系統之峰均功率比值

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