博碩士論文 945303009 詳細資訊




以作者查詢圖書館館藏 以作者查詢臺灣博碩士 以作者查詢全國書目 勘誤回報 、線上人數:6 、訪客IP:34.207.82.217
姓名 林俊宗(Chun-Tsung Lin)  查詢紙本館藏   畢業系所 通訊工程學系在職專班
論文名稱 可調適性正交分頻多工系統之長時間通道預估法分析
(Long range prediction for adaptive orthogonal frequency division multiplexing system)
相關論文
★ 利用手持式手機工具優化行動網路系統於特殊型活動環境★ 穿戴裝置動態軌跡曲線演算法設計
★ 石英諧振器之電極面設計對振盪頻率擾動之溫度相依性研究★ 感知無線電異質網路下以不完美頻譜偵測進行資源配置之探討
★ 大數量且有限天線之多輸入多輸出系統效能分析★ 應用於3GPP WCDMA-FDD上傳鏈路系統的遞迴最小平方波束合成犛耙式接收機
★ 調適性遠時程瑞雷衰退通道預測演算法設計與性能比較★ 智慧型天線之複合式到達方位-時間延遲估測演算法及Geo-location應用
★ 應用功率控制之行動載具速度區段檢測技術★ 多級威能濾波器演算法應用在瑞雷衰退通道預測之最佳化設計
★ 多輸入多輸出正交分頻多工系統之調適性通道估測★ 多載波直接序列分碼多重進接系統之調適性位元、子載波、功率和展頻因子配置機制
★ 子空間方法應用於向下鏈結多載波分碼多重進接系統頻率偏移估測之探討★ 正交分頻多工系統中之方位角估測及應用在接收器之設計
★ 多級威能濾波器之應用於向上鏈結多載波分碼多重進接系統之接收器設計★ 適用於離散多頻系統之快速交替性的多重使用者位元負載演算法
檔案 [Endnote RIS 格式]    [Bibtex 格式]    [相關文章]   [文章引用]   [完整記錄]   [館藏目錄]   [檢視]  [下載]
  1. 本電子論文使用權限為同意立即開放。
  2. 已達開放權限電子全文僅授權使用者為學術研究之目的,進行個人非營利性質之檢索、閱讀、列印。
  3. 請遵守中華民國著作權法之相關規定,切勿任意重製、散佈、改作、轉貼、播送,以免觸法。

摘要(中) 為了要滿足所有無線通訊服務在聲音、資料及視訊上對頻寬的強大需求,正交分頻多工(OFDM)技術被廣為使用。OFDM系統將大量的資料分散成許多個較小的容量,並由許多個子載波同時間的傳送,這些子載波在頻率上一樣交疊著,只是藉由FFT運算有效地分散彼此,使彼此間不會和傳統FDM系統一樣會有干擾問題。
為了更進一步地改善通訊系統的效能,遂衍生出了可調適性正交分頻多工(AOFDM)技術,而為了有效地調適通道負載,通道狀態(CSI)必須被傳回至傳送端;且為了解決高速移動所帶來的通道問題,我們使用長時間通道預估法於AOFDM系統中,而本論文針對AOFDM系統來探討幾項長時間通道預估法,藉著模擬結果來了解其預估法的特性,並探討如何使系統的性能更有效地被利用。
摘要(英) To accomplish the increasing demand for all types of wireless services such as voice, data, and multimedia, orthogonal frequency division multiplexing (OFDM) technology is promoted. OFDM splits a high-rate data stream into a number of lower rate streams that are transmitted simultaneously over a number of sub-carrier. These sub-carriers typically overlap in frequency, but are designed not to interfere with each other as would be the case with traditional FDM, and may be efficiently separated by using a fast Fourier transform (FFT) algorithm.
Adaptive orthogonal frequency division multiplexing (AOFDM) technology improves the ability of OFDM. To accomplish efficient adaptive channel loading, the channel state information (CSI) needs to be fed back to the transmitter. Since the fading channel varies rapidly for fast vehicle speeds, long range fading prediction is required for mobile AOFDM to insure reliable adaptation. In this thesis, we investigate several long range predictions in AOFDM system. We’d also know the characteristics of prediction algorithms by simulation results.
關鍵字(中) ★ 長時間預估
★ 可調適性正交分頻多工
關鍵字(英) ★ AOFDM
★ LRP
論文目次 第一章 緒論 ………………………………………………… 1
1-1 前言 ……………………………………………… 1
1-2 研究動機 ………………………………………… 1
1-3 章節概要 ………………………………………… 2
第二章 正交分頻多工(OFDM)系統簡介 …………………… 4
2-1 正交分頻多工(OFDM)系統原理之介紹 ………… 4
2-1-1 分頻多工與正交原理之簡介 ……………… 4
2-1-2 保護區間之簡介 …………………………… 7
2-1-3 OFDM系統模型之簡介 ……………………… 8
2-2 IEEE 802.16-2005系統簡介 ………………… 13
第三章 通道預估法之簡介 ……………………………… 17
3-1 Least Mean Square algorithm (LMS) ……… 21
3-2 Normalized LMS algorithm (NLMS) ………… 22
3-3 Leaky-NLMS algorithm ………………………… 23
3-4 Recursive Least Squares algorithm (RLS) … 24
3-5 Adaptive LMS algorithm (ALMS) …………… 25
3-6 Adaptive RLS algorithm (ARLS) …………… 26
第四章 電腦模擬與結果分析 …………………………… 28
4-1 模擬系統簡介 ………………………………… 28
4-2 系統模擬與分析 ……………………………… 31
第五章 結論與未來研究方向 …………………………… 42
參考文獻 …………………………………………………… 43
參考文獻 [1] Alexandra Duel-Hallen, Hans Hallen, and Tung-Sheng Yang, “Long Range Prediction and Reduced Feedback for Mobile Radio Adaptive OFDM Systems” IEEE Trans. Commun., vol. 5, no. 10, Oct 2006.
[2] A. Duel-Hallen, S. Hu, and H. Hallen, “Long range prediction of fading signals: Enabling adaptive transmission for mobile radio channels” IEEE Signal Processing Mag., vol. 17, no. 3, pp. 62–75, May 2000.
[3] H. Hallen, S. Hu, M. Lei, and A. Duel-Hallen, “A physical model for wireless channels to understand and test long range prediction of flat fading” in Proc. Wireless 2001, July 2001.
[4] H. Hallen, A. Duel-Hallen, S. Hu, T. S. Yang, and M. Lei, “A physical model for wireless channels to provide insights for long range prediction” in Proc. IEEE MILCOM, Oct. 2002, vol. 1, pp. 627–631.
[5] Y. Li, L. J. Cimini, and N. R. Sollenberger, “Robust channel estimation for OFDM systems with rapid diversive fading channel” IEEE Trans Commun., vol. 46, pp. 902–915, Apr. 1998.
[6] Tung-Sheng Yang, “Performance Analysis of Adaptive Transmission Aided by Long Range Channel Prediction for Realistic Single-and Multi-Carrier Mobile Radio Channels” PhD thesis, North Carolina State University, 2004.
[7] W. C. Jakes, Microwave Mobile Communications. New York: Wiley, 1974.
[8] T. S. Rappaport, Wireless Communications: Principles and Practice, 2nd ed. Upper Saddle River, NJ: Prentice-Hall, 2000.
[9] S. Haykin, Adaptive Filter Theory, 3rd ed. Upper Saddle River, NJ: Prentice-Hall, 1996.
[10] A. Papoulis, Probability, Random Variables, and Stochastic Processes, 3rd ed. New York: McGraw-Hill, 1991.
[11] M. Lei and A. Duel-Hallen, “Long range channel prediction and adaptive transmission for frequency hopping communications” in Proc.41st Annual Allerton Conference on Communications, Control, and Computing, Oct. 2003, pp. 1-10.
[12] J. G. Proakis, Digital Communications, 3rd ed. New York: McGraw-Hill, 1995.
[13] A. Arredondo, K. R. Dandekar, and Guanghan Xu, “Vector channel modeling and prediction for the improvement of downlink received power” IEEE Trans. Commun., vol. 50, no. 7, pp.1121–1129, July 2002.
[14] Aditya Dua and Nicholas Bambos, “Downlink Scheduling of Heterogeneous Traffic” Department of Electrical Engineering, Stanford University, Stanford, CA 94305.
指導教授 陳永芳(Y.F. Chen) 審核日期 2008-7-16
推文 facebook   plurk   twitter   funp   google   live   udn   HD   myshare   reddit   netvibes   friend   youpush   delicious   baidu   
網路書籤 Google bookmarks   del.icio.us   hemidemi   myshare   

若有論文相關問題,請聯絡國立中央大學圖書館推廣服務組 TEL:(03)422-7151轉57407,或E-mail聯絡  - 隱私權政策聲明