(54.236.58.220) 您好!臺灣時間:2021/02/28 08:16
字體大小: 字級放大   字級縮小   預設字形  
回查詢結果

詳目顯示:::

我願授權國圖
: 
twitterline
研究生:黃楷捷
研究生(外文):Kai-Chieh Huang
論文名稱:多重輸入多重輸出之正交分頻多工系統中對聯合載波頻率和通道估測的疊代演算法設計
論文名稱(外文):Maximum-Likelihood-based Iteration Algorithm Design for Joint CFO and Channel Estimation in MIMO-OFDM Systems
指導教授:陳永芳陳永芳引用關係
學位類別:碩士
校院名稱:國立中央大學
系所名稱:通訊工程學系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2018
畢業學年度:106
語文別:英文
論文頁數:41
中文關鍵詞:聯合最大可能性估測載波頻率偏移估測多輸入多輸出系統正交分頻多工系統通道估測
相關次數:
  • 被引用被引用:0
  • 點閱點閱:63
  • 評分評分:系統版面圖檔系統版面圖檔系統版面圖檔系統版面圖檔系統版面圖檔
  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0
這篇論文探討了在多重輸入多重輸出之正交分頻多工系統中利用最大可能性準則做載波頻率偏移和通道響應的聯合估測。初步介紹此系統的訊號模型以及基於最大可能性的聯合估測器推導,此演算法可以分成兩大部分,第一部分是利用旋轉觀念對載波頻率偏移作初始的估測,再利用初始結果設計頻域等化器。第二部分則是利用疊代的觀念來找出真正最大的頻率波峰,使載波頻率偏移估測的效果能更好。此疊代演算法可以正確收斂至全域最大值而不是區域最大值,且與格子搜尋法相比減少計算複雜度,模擬效能表現出來在均方誤差精確度上也貼近於克拉瑪界線。
In this thesis, we present a joint carrier frequency offset (CFO) and frequency selective channel response estimation in multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM) systems. The signal model of MIMO-OFDM is introduced and the joint estimator is derived based on the maximum likelihood criterion. The proposed algorithm can be separated into two major portions. In the first part of proposed algorithm, we estimate an initial CFO by using the rotation concept and utilize the result to design the frequency domain equalizer. The second part is to employ iterative concept to find the true frequency peak for better CFO estimation performance. The proposed method can surely converge to the global maximum solution step by step. In addition, the computation complexity is less than the grid-search method. The MSE performance of the proposed algorithm shown in the simulation result is close to the Cramer-Rao Lower bound (CRB).
論文摘要 I
Abstract II
致謝 III
Contents IV
List of Figures V
List of Tables VI
1.Introduction 1
2.System Model 6
2.1 Transmitter 6
2.2 Wireless Channel 7
2.3 Receiver 7
3.Maximum Likelihood Carrier Frequency Estimation 10
4.Proposed New Algorithm Scheme 13
4.1 Mathematical Derivation 13
4.2 Initial CFO Estimation 16
4.3 Frequency Domain Equalizer Design 17
4.4 Small Step Iterative Searching 18
5.Simulation Result 22
5.1 Simulation Parameters for OFDM System 22
5.2 Algorithm Performance 23
6.Conclusion 27
7.Reference 28
[1] P. W. Wolniansky, G. J. Foschini, G. D. Golden and R. A. Valenzuela, “VBLAST: an architecture for realizing very high data rates over the rich-scattering wireless channel,” in IEEE URSI Int. Symp. Signals, Systems, and Electronics, pp. 295–300, Oct. 1998
[2] J. Bingham, “Multicarrier modulation for data transmission: An idea whose time has come,” IEEE Commun. Mag., vol. 28, pp. 5-14, May 1990.
[3] X. Ma, M.-K. Oh, G. B. Giannakis, and D.-J. Park, “Hopping pilots for estimation of frequency-offset and multiantenna channels in MIMOOFDM,” IEEE Trans. Commun., vol. 53, no. 1, pp. 162-172, 2005.
[4] J. Lee, H. Lou, D. Toumpakaris, and J. M. Cioffi, “Effect of carrierfrequency offset on OFDM systems for multipath fading channels,” IEEE Global Telecommun. Conf., vol.6, pp.3721-3725, Nov. 2004.
[5] Man-On Pun, M. Morelli and C.-C. Jay Kuo, “Iterative detection and frequency synchronization for OFDMA uplink transmissions” IEEE Trans. Wireless Commun., vol. 6, no. 2, pp. 629–639, Feb. 2007.
[6] P.H. Moose, “A technique for orthogonal frequency division multiplexing frequency offset correction,” IEEE Trans. Commun., vol 42, no. 10, pp. 2908–2914, 1994.
[7] A. J. Coulson, “Maximum likelihood synchronization for OFDM using a pilot symbol: Algorithm,” IEEE J. Sel. Areas Commun., vol. 19, no. 12, pp. 2486–2494, Dec. 2001.
[8] J. J. van de Beek, O. Edfors and M. Sandell, “On channel estimation in OFDM systems,” in Proc. Vehi. Technol. Conf., vol. 2, pp. 815–819, Jul. 1995.
[9] M. Morelli and U. Mengali, “A comparison of pilot-aided channel estimation methods for OFDM systems,” IEEE Trans. Signal Proc., vol. 49, no. 12, pp. 3065–3073, Dec. 2001.
[10] B.H. Fleury , M. Tschudin, R. Heddergott, D. Dahlhaus, K. Ingeman Pedersen, “Channel parameter estimation in mobile radio environments using the SAGE algorithm,” IEEE J. Sel. Areas Commun., vol. 17, pp. 434–450, Mar. 1999.
[11] C. Tao and C. Tellambura,“Robust joint frequency offset and channel estimation for OFDM systems,” IEEE Veh. Technol. Conf., vol.1, pp. 603-607, Sept. 2004.
[12] J. Chen, Y.C. Wu and T.S. Ng, “Optimal joint CFO and channel estimation in quasi-synchronized OFDM systems,” IEEE Global Telecommun. Conf., pp. 2816-2820, Nov. 2007.
[13] M.-O. Pun, M. Morelli, C.-C.J. Kuo, “Maximum-likelihood synchronization and channel estimation for OFDMA uplink transmissions,” IEEE Trans. Commun., vol. 54, pp. 726-736, April. 2006
[14] I. Ziskind, M. Wax, “Maximum likelihood localization of multiple sources by alternating projection,” IEEE Trans. Acoustic Speech Signal Process., vol. 36, pp. 1553-1560, Oct. 1998
[15] A. Saemi, V. Meghdadi, J.P. Cances, M.R. Zahabi, J.M. Dumas, “ML Time-Frequency Synchronization for MIMO-OFDM Systems in Unknown Frequency Selective Fading Channels,” in Proc. of the IEEE Int. Symp. on Personal, Indoor and Mobile Radio Commun. (PIMRC), pp. 1-5, Sept. 2007.
[16] A. SAEMI, V. MEGHDADI, J.P. CANCES, M.R. ZAHABI, “Iterative (turbo) EM-based time and frequency synchronization for MIMO – OFDM systems,” IET Commun., vol. 2, pp. 982– 993, 2008.
[17] S. Salari, M. Ardebilipour, and M. Ahmadian, “Joint maximum-likelihood frequency offset and channel estimation for multiple-input multiple-output-orthogonal frequency-division multiplexing systems,” IET Commun., vol. 2, pp. 1069-1076, 2008.
[18] S. Salari, M. Ahmadian, M. Ardebilipour, V. Meghdadi, J. P. Cances, “Maximum-likelihood carrier-frequency synchronization and channel estimation for MIMO-OFDM systems,” Wireless Telecommun. Symp., pp. 1-5, July. 2007.
[19] S. Salari, M. Heydarzadeh, and J. P. Cances, “Joint maximum-likelihood frequency synchronization and channel estimation in MIMO-OFDM systems with timing ambiguity,” in Int. Symp. on Wireless Commun. Systems (ISWCS), pp. 954 –958, Aug. 2012.
[20] S.-H. Chiu, K.-C. Fu, Y.-F. Chen, “A modified algorithm for joint frequency offset and channel estimation in OFDM systems,” Int. Conf. on Commun. in China (ICCC), Aug. 2013.
[21] M. Morelli and U. Mengali, “Carrier-frequency estimation for transmissions over selective channels,” IEEE Trans. Commun., vol. 48,no.9, Sept. 2000.
[22] H. Hojatian, M. J. Omidi, H. Saeedi-Sourck, A. Farhang, “Joint CFO and channel estimation in OFDM-based massive MIMO systems,” Int. Symp. on Telecommun. (IST), Sept. 2016.
[23] P. Stoica and O. Besson, ‘‘Training sequence design for frequency offset and frequency-selective channel estimation,’’ IEEE Trans. Commun., vol. 51, no. 11, pp. 1910--1917, Nov. 2003.
電子全文 電子全文(網際網路公開日期:20230901)
連結至畢業學校之論文網頁點我開啟連結
註: 此連結為研究生畢業學校所提供,不一定有電子全文可供下載,若連結有誤,請點選上方之〝勘誤回報〞功能,我們會盡快修正,謝謝!
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top
系統版面圖檔 系統版面圖檔