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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 張進福(Jin-Fu Chang) | |
| dc.contributor.author | Yi-Yao Lan | en |
| dc.contributor.author | 藍義堯 | zh_TW |
| dc.date.accessioned | 2021-06-14T16:44:00Z | - |
| dc.date.available | 2013-08-08 | |
| dc.date.copyright | 2008-08-08 | |
| dc.date.issued | 2008 | |
| dc.date.submitted | 2008-08-01 | |
| dc.identifier.citation | [1] http://www.hsr.gov.tw/
[2] http://www.thsrc.com.tw/ [3] J. Irvine, J. -P. Couvy, F.Graziosi, J. Laurila, G. Mossakowski, and P Robin,“System Architecture for the MOSTRAIN Project ( mobile services for high speedtrains),” Vehicular Technology Conference, IEEE 47th Volume 3, pp. 1917-1921vol.3, 1997. [4] Theodore S. Rappaport,“Wireless Communications: Principles and Practice”, 2nd Edition, Prentice Hall PTR, 2002 [5] Richard van Nee and Ramjee Prasad, “OFDM for wireless multimedia communications”, Artech House, 2000. [6] J. K. Cavers, Mobile Channel Characteristics, Kluwer Academic Publisher, 2000 [7] Hiroshi Harada and Ramjee Prasad, Simulation and Software Radio for Mobile Communications, Artech House, 2002 [8] 溫志宏、劉宗憲、邱茂清、林仁勇、連振凱、林進豐、李國瑞， 正交分頻多重進接技術， 滄海書局，民96 [9] J. K. Cavers, Mobile Channel Characteristics, Kluwer Academic Publisher, 2000 [10] 3gpp TR 25.943 V7.0.0 (2007-06) [11] Wideband Wireless Digital Communications Andreas F. Molisch 2001 by Prentice Hall PTR Prentice-Hall,Inc [12] 通訊與電腦整合應用人才培訓計畫，沈文和教授上課講義。 [13] T. M. Schmidl and D. C. Cox, “Robust frequency and timing synchronization for OFDM”,[ IEEE Trans. Commun., vol. 45, no. 12, pp. 1613–1621, Dec. 1997. [14] M. Morelli and U. Mengali, “An improved frequency offset estimator for OFDM applications”,[ IEEE Commun. Lett., vol. 3, no. 3, pp. 75–77, Mar. 1999. [15] Jia-Chin Lin, “Maximum-likelihood frame timing instant and frequency offset estimation for OFDM communication over a fast Rayleigh-fading channel,” IEEE Trans. Veh. Technol., vol. 52, no. 4, pp. 1049-1062, Jul. 2003. [16] Lv, T.; Hua Li; Jie Chen;” Joint estimation of symbol timing and carrier frequency offset of OFDM signals over fast time-varying multipath channels” Signal Processing, IEEE Transactions on [see also Acoustics, Speech, and Signal Processing, IEEE Transactions on] Volume 53, Issue 12, Dec. 2005 Page(s):4526 – 4535 [17] J. J. van de Beek, M. Sandell, and P. O. Borjesson, “ML estimation of timing and frequency offset in OFDM systems”,[IEEE Trans. Signal Proc., vol. 45, no. 7,pp. 1800–1805, Jul. 1997. [18] Jia-Chin Lin,“A frequency offset estimation technique based on frequency error characterization for OFDM communication on multipath fading channels.” IEEE Trans. Veh. Technol., vol. 56, no. 3, pp. 1209-1222, May 2007. [19] Morelli, M.; Kuo, C.-C.J.; Pun, M.-O.” Synchronization Techniques for Orthogonal Frequency Division Multiple Access (OFDMA): A Tutorial Review” Proceedings of the IEEE Volume 95, Issue 7, July 2007 Page(s):1394-1427 . [20] Bhatt, Tejas; Sundaramurthy, Vishwas; Zhang, Jianzhong; McCain, Dennis;“Initial Synchronization for 802.16e Downlink”Signals, Systems and Computers, 2006. ACSSC '06. Fortieth Asilomar Conference on Oct. 29 2006-Nov. 1 2006 Page(s):701 - 706 | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/40283 | - |
| dc.description.abstract | 本篇論文主要研究在超高移動速度下使用正交分頻多工技術的頻率同步。台灣高速鐵路的超高移動速度環境下將導致嚴重的都卜勒效應，所以通道將會是一個快速衰變且多路徑干擾(雙選擇性通道)。傳送端與接收端的振盪器彼此不匹配與通道的都卜勒效應會產生載波頻率偏移量。為了能在超高移動速度環境下使用正交分頻多工技術，我們提出多段式訓練符元、權重法與預測機制法來抵抗時變通道的破壞並進行載波頻率偏移量估測。當載波頻率偏移量估測完成後，我們在接收端會進行頻率補償來完成整個頻率同步。 | zh_TW |
| dc.description.abstract | This thesis emphasize on frequency synchronization for OFDM in very high mobility environment. The very high mobility environment for TAIWAN HIGH SPEED RAIL (300km/hr) leads to critical doppler effect, so the channel will cause fast fading and multipath interference (doubly selective channel).The mismatch between transmitter and receiver and doppler effect will bring about carrier frequency offset. In order to working OFDM technique in very high mobility environment, we propose multiple sections training symbol method、weighting method and prediction mode method to resist time-variant channel and then do carrier frequency offset estimation。After we finish carrier frequency offset estimation, we do frequency compensation to reach whole frequency synchronization. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-14T16:44:00Z (GMT). No. of bitstreams: 1 ntu-97-R95942119-1.pdf: 10150392 bytes, checksum: 5b02a8cc90120d5d2caa300be66b21ae (MD5) Previous issue date: 2008 | en |
| dc.description.tableofcontents | 致 謝 I
中文摘要 II Abstract III 圖目錄 VI 表目錄 VIII 第一章 緒論 1 1.1 前言 1 1.2 研究背景 2 1.3 台灣高速鐵路的環境與其通訊系統架構 3 1.4 正交分頻多工技術的介紹 8 1.5 通道模型的探討 11 1.6 研究動機 18 1.7 論文架構 18 第二章 超高移動速度環境下使用正交分頻多工系統的頻率同步 20 2.1 正交分頻多工下的同步問題 20 2.2 同步誤差對系統效能的影響 21 2.3 傳統頻率同步的方法 30 2.4 超高速移動環境下載波偏移量的估測方法 31 2.5 模擬結果 39 2.6 討論 44 第三章 超高移動速度環境下用權重改善頻率同步 45 3.1 使用權重改善頻率同步的動機 45 3.2 權重頻率同步的基礎理論 46 3.3 權重頻率估計子與系統架構圖 57 3.4 模擬結果 60 3.5 討論 64 第四章 超高移動速度環境下利用預測機制提昇頻率估計準確度 66 4.1 預測機制的理論基礎 66 4.2 預測機制的演算程序 76 4.3 模擬結果 85 4.4 討論 88 第五章 超高移動速度環境下使用700MHz頻段的頻率同步 89 5.1 前言 89 5.2 700MHz頻段的簡介 89 5.3 頻率同步方法的回顧 92 5.4 模擬結果 94 5.5 討論 97 第六章 總結 99 6.1 論文總結 99 6.2 未來展望 100 | |
| dc.language.iso | zh-TW | |
| dc.title | 在超高速移動環境下使用正交分頻多工技術之頻率同步 | zh_TW |
| dc.title | Frequency Synchronization for OFDM System
in Very High Mobility Environment | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 96-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 金力鵬,魏學文 | |
| dc.subject.keyword | 超高移動速度環境,正交分頻多工,載波頻率偏移,都卜勒效應,雙選擇性通道,頻率同步, | zh_TW |
| dc.subject.keyword | Very high mobility environment,OFDM,Carrier frequency offset,Doppler effect,Doubly selective channel,Frequency synchronization, | en |
| dc.relation.page | 104 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2008-08-01 | |
| dc.contributor.author-college | 電機資訊學院 | zh_TW |
| dc.contributor.author-dept | 電信工程學研究所 | zh_TW |
| 顯示於系所單位： | 電信工程學研究所 | |
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