Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/7838
DC FieldValueLanguage
dc.contributor吳昭明zh_TW
dc.contributorChao-Ming Wuen_US
dc.contributor張鴻義zh_TW
dc.contributorHong-I Changen_US
dc.contributor.advisor陳後守zh_TW
dc.contributor.advisorHou-Shou Chenen_US
dc.contributor.author劉郁旻zh_TW
dc.contributor.authorLiu, Yu-Mingen_US
dc.contributor.other中興大學zh_TW
dc.date2009zh_TW
dc.date.accessioned2014-06-06T06:40:38Z-
dc.date.available2014-06-06T06:40:38Z-
dc.identifierU0005-0208200801383200zh_TW
dc.identifier.citation[1] R. V. Nee and R. Prasad, OFDM for Wireless Multimedia Communications, Artech House, Boston, 2000 [2] L. J. Cinimi Jr."Analysis and Simulation of a Digital Mobile Channel Using Orthogonal Frequency Division Multiplexing” IEEE Trans. Commun., vol. COM-33,no.7 ,pp.665-675, Jul. ,1985 [3] E. C. Ifeachor and B. W. Jervis, Digital Signal Proce- ssing, ed., Prentice Hall, 2002 [4] R. W. Chang, “Synthesis of band-limit orthogonal signals for multichannel data transmission,”Bell Syst. Tech. J.,vol.45, pp.1775-1796, Dec.1966 [5] R. W. Chang and R. A. Gibbey."A theoretical study of performance of an orthogonal multiplexing data trans- mission scheme,” IEEE Trans. Commun.,vol.COM-16,pp. 529-540, Aug.1968 [6] Mosier, R. R., and R. G. Clabaugh,“Kineplex,a Band- width Efficient Binary Transmission System," AIEE Trans., vol.76, pp.723-728, Jan.1958 [7] Porter, G. C.,“Error Distribution and Diversity Performance of a Frequency Differential PSK HF modem, " IEEE Trans. Commun. vol..COM-16, pp.567-575, Aug. 1968 [8] Zimmerman, M. S., and A. L. Kirsch,"The AN/GSC-10 (KAT HRYN) variable rate data modem for HF radio," IEEE Trans.Commun. vol.,COM-15, pp.197-205,Apr. 1967 [9] S. H. .Han and J. H. Lee, ”An Overview of Peak-to- Average Power Ratio Reduction Techniques for Multi- carrier Transmission, ”IEEE Wireless Commun.,vol:12 issue:2, pp.56-65, April 2005 [10] T. Jiang and Y. Wu, ”An Overview : Peak-to-Average Power Ratio Reduction Techniques for OFDM Signals” IEEE Trans. Broadcas., vol.54, issue.2, pp.257-268, June 2008 [11] S.H. Müller and J. B. Huber, ”OFDM with reduced peak- to-average power ratio by optimum combination of partial transmit sequences,”Electron. Lett., vol.33, p.368, Feb.1997 [12] S. G. Kang and J. G. Kim,"A Novel Subblock Partition Scheme for Partial Transmit Sequence OFDM,"IEEE Trans. Broadcas., vol:45 issue:3, pp.333-338, Sept.1999 [13] S. Lin and D. J. Costello. Jr.,”Error Control Coding, 2nd ed.,”Prentice Hall,2004 [14] L. J. Cimini, Jr. and N. R. Sollenberger.”Peak-to- Average Power Ratio Reduction of an OFDM Signal Using Partial Transmit Sequences,”IEEE Communications Lett. ,vol:4 issue:3, pp.86-88, Mar. 2000 [15] L. J. Cimini, Jr. and N. R. Sollenberger,”Peak-to- Average Power Ratio Reduction of an OFDM Signal Using Partial Transmit Sequences,”IEEE ICC'99, vol.1, pp. 511-515, Jun. 1999 [16] O. J. Kwon and Y. H. Ha, “Multi-Carrier”PAP Reduc- tion Method Using Sub-Optimal PTS With Threshold,” IEEE Trans. Broadcas., vol.49,no.2, pp.232-236,Jun. 2003 [17] S. H. Han and J. H. Lee,”PAPR Reduction of OFDM Signals Using a Reduced Complexity PTS Technique,” IEEE Signal Processing Lett.,vol.11, no.11,pp.887- 890, Nov. 2004 [18] 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.Broadcas., vol. 52, no.1, pp.83-86, Mar. 2006 [19] M. Park, H. Jun, J. Cho, N. Cho, D. Hong and C. Kang, ”PAPR Reduction in OFDM Transmission using Hadamard Transform,” IEEE ICC'00, vol.1, pp.430-433,Jun. 2000 [20] H. Chen and H. Liang, “Binary Golay Complementary Se- quences in Walsh-Hadamard Transformed OFDM Systems, IEEE International Symposium on Intelligent Signal Processing and Communication Systems, Japan, pp.999- 1002 , Dec.2006 [21] X. Zhu, G. Zhu and T. Jian,“A Novel Transformation Scheme for PAPR Reduction in OFDM Systems,” IEEE Trans. Wireless Commun., Oct. 2007 [22] C. Tellambura,"Upper bound on peak factor of N-multi- ple carriers,”Electron.Lett. vol.33, issue 19, 11, pp.1608-1609, Sept. 1997zh_TW
dc.identifier.urihttp://hdl.handle.net/11455/7838-
dc.description.abstract正交分頻多工(Orthogonal Frequency Division Multiplexing ,OFDM)系統為多載波傳輸系統的一個特例,OFDM系統中其中一個缺點就是高峰均值比(peak-to-average power ratio,PAPR)。當子載波的相位具某種特定組合的時候,所有的符元(symbol)功率將會一起加起來,這將會引起高的PAPR。 降低PAPR的方法有很多種,我們採用部分傳輸序列(Partial Transmit Sequence,PTS)系統當主系統,並使用在其系統中使用預轉換的觀念來降低PAPR,我們使用哈達碼轉換(Walsh-Hadamard Transform,WHT)以及反離散傅立葉轉換(Inverse Discrete Fourier Transform,IDFT)來當預轉換,根據預轉換的放置位置,針對每個預轉換我們可以得到兩個系統。 高運算複雜度一直是PTS系統的一個大缺點,針對這項缺點,我們採用一種降低複雜度演算法的觀念,把這些觀念放在不同預轉換系統中進行分析模擬。此外,為使PTS系統中的權重因子(weighting factor)具有錯誤更正的能力,我們對其編碼,並於不同預轉換系統中進行分析。 最後,我們會從各種模擬結果中得到不一樣的結論並且驗證了使用預轉換能改善PAPR的效能。zh_TW
dc.description.abstractOrthogonal Frequency Division Multiplexing (OFDM) System is a special case of the multicarrier transmission system. One of the faults is the high peak-to-average power ratio( PAPR) in OFDM system. When subcarriesrs'' phase has certain combination, all of the symbol power summarize together.It causes the high PAPR. There are many ways to reduce PAPR. We select Partial Transmit Sequence (PTS) system as the main system and take the concept of the pre-transform in the PTS system to re duce PAPR. We use the Walsh-Hadamard Transform (WHT) and Inverse Discrete Fourier Transform (IDFT) as the pre-transform. According to the pre-transform's location ,we can get the two systems for every pre-transform. High computation complexity is always the big fault of the PTS system. We will take a concept of reduction complexity algorithm for this fault and use this concept to simulate and analyze for different pre-transform systems. Besides, in order to let the weighting factor of the PTS system has error correcting ability, we encodes it and analyze for different pre-transform systems. Finally, we have the different conclusions from every simulation results and prove that using pre-transform can improve PAPR reduction performance.en_US
dc.description.tableofcontents誌謝………………………………………………………………………i 中文摘要………………………………………………………………ii Abstract…………………………………………………………….iii 目錄……………………………………………………………………iv 圖目錄…………………………………………………………………vi 表目錄…………………………………………………………………ix 第一章 緒論……………………………………………………………1 1.1 研究動機…………………………………………………1 1.2 章節介紹…………………………………………………2 第二章 OFDM系統介紹…………………………………………………3 2.1 OFDM系統架構及其原理…………………………………3 2.2反離散傅立葉轉換(Inverse Discrete Fourier Trans- form,IDFT)………………………………………………6 2.3 OFDM的正交性……………………………………………8 2.4 保護區間(Guard Interval)和循環延伸(Cyclic Exten- sion)……………………………………………………10 2.4.1保護區間(Guard Interval)……………………11 2.4.2循環延伸(Cyclic Extension)…………………12 2.5 OFDM的優缺點………………………………………… 13 2.6 OFDM的歷史用應用…………………………………… 14 第三章 OFDM系統的高峰均值比問題……………………………… 16 3.1 OFDM的峰均值比……………………………………… 16 3.1.1 補累積分布函數(Complementary CDF,CCDF) ………………………………………………… 17 3.2 部分傳輸序列(Partial Transmit Sequence,PTS) ………………………………………………………… 17 3.2.1 區塊劃分方式………………………………… 21 3.3 其他降低PAPR問題的方法介紹……………………… 23 3.3.1 振幅截波(Amplitude Clipping)…………… 23 3.3.2 編碼(Coding)………………………………… 24 3.3.3 峰值視窗(Peak Windowing)………………… 25 3.3.4 峰值刪除(Peak Concellation )…………… 25 第四章 PTS系統使用預轉換來降低PAPR效果之研究………………28 4.1 線性區塊碼(Linear Block Code)之介紹……………28 4.1.1 徵狀(Syndrome)與錯誤更正………………… 32 4.1.2 區塊碼的漢明權重與最小距離……………… 32 4.1.3 漢明碼(Hamming Code)……………………… 35 4.2 降低複雜度演算法…………………………………… 36 4.3 使用哈達碼轉(Walsh-Hadamard Transform)換當預 轉換之PTS系統…………………………………………41 4.4 使用反離散傅立葉轉換當預轉換的OFDM系統……… 44 4.5 PTS系統使用預轉換來降低PAPR之效果分析與比較…49 第五章 結論………………………………………………………… 65 參考文獻………………………………………………………………66zh_TW
dc.language.isoen_USzh_TW
dc.publisher電機工程學系所zh_TW
dc.relation.urihttp://www.airitilibrary.com/Publication/alDetailedMesh1?DocID=U0005-0208200801383200en_US
dc.subjectPTSen_US
dc.subject部分傳輸序列zh_TW
dc.subjectWHTen_US
dc.subjectIDFTen_US
dc.subjectOFDMen_US
dc.subjectPAPRen_US
dc.subjectPre-Transformen_US
dc.subject哈達碼轉換zh_TW
dc.subject正交分頻多工zh_TW
dc.subject高峰均值比zh_TW
dc.subject預轉換zh_TW
dc.title使用哈達碼轉換/反離散傅立葉轉換作為正交分頻多工系統之預轉換藉部分傳輸序列來降低峰均值比zh_TW
dc.titleUsing WHT/IDFT as the Pre-Transform in OFDM System to Reduce PAPR by Partial Transmit Sequenceen_US
dc.typeThesis and Dissertationzh_TW
Appears in Collections:電機工程學系所
文件中的檔案:

取得全文請前往華藝線上圖書館



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.