正交分頻多工系統最大可能性聯合載波頻率和通道估測

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：25

、訪客IP：3.15.145.236

姓名

邱士豪(Shi-Hao Chiu) 查詢紙本館藏

畢業系所

通訊工程學系

論文名稱

正交分頻多工系統最大可能性聯合載波頻率和通道估測
(Joint Maximum Likelihood Estimation of Carrier Frequency Offsets and Channels in OFDM Systems)

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	★ 股票開盤價漲跌預測
★ 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
★ 具有元學習分類權重轉移網路生成遮罩於少樣本圖像分割技術	★ 具有注意力機制之隱式表示於影像重建三維人體模型
★ 使用對抗式圖形神經網路之物件偵測張榮	★ 基於弱監督式學習可變形模型之三維人臉重建
★ 以非監督式表徵分離學習之邊緣運算裝置低延遲樂曲中人聲轉換架構	★ 基於序列至序列模型之 FMCW雷達估計人體姿勢
★ 基於多層次注意力機制之單目相機語意場景補全技術	★ 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

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]

本電子論文使用權限為同意立即開放。
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。
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)

這篇論文探討了在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頻率選擇通道響應的聯合估測。首先介紹訊號模型以及聯合估測器的推導，提出的演算法可以分成兩大部分，第一部分是利用旋轉觀念初步的估測載波頻率偏移再利用頻域等化器來提升估測準確率，第二部分則是利用疊代的觀念來找到最大的頻率波峰。所提出的疊代演算法不需要做初始值的猜測，可以正確收斂至全域最大值而不是區域最大值，演算法的計算複雜度和格子搜尋法比較起來大幅度的減少，較利於硬體上的實現而且在平均錯誤平方 (MSE) 精確度上也貼近於克拉瑪 (CRB) 界線。

摘要(英)

A joint estimation method of carrier frequency offset and frequency selective channel response in orthogonal frequency division multiplexing (OFDM) systems is presented in this thesis based on the maximum likelihood (ML) criterion. The signal model is introduced and a joint estimator is derived. The proposed algorithm can be divided into two major portions. The first part is to use the rotation concept to estimate the initial CFO and design the frequency domain equalizer. The second part is making use of iterative concept to find the true frequency peak for better estimate. The proposed scheme does not require initial random guess as regular iterative algorithms, in which may suffer from the problem of the convergence to the local maximum. The proposed approach can surely converge to the global maximum for achieving the solution. The computation complexity is much less than the grid-search method and easily be implemented in hardware. The MSE performance of the proposed algorithm is close to the Cramer-Rao Lower bound which is shown in the simulation result.

關鍵字(中)

★ 正交分頻多工載波頻率偏移

關鍵字(英)

★ joint maximum likelihood estimation
★ carrier fre

論文目次

論文摘要 II
Abstract III
致謝 IV
Contents V
List of Figures VII
List of Tables VIII
1.Introduction 1
2.System Model 7
2.1 Transmitter 7
2.2 Wireless Channel 8
2.3 Receiver 8
3.Maximum Likelihood Carrier Frequency Estimation 11
4.Proposed New Algorithm Scheme 13
4.1 Mathematical Derivation 13
4.2 Initial CFO Estimation 16
4.3 Frequency Domain Equalizer Design 18
4.4 Small Step Iterative Searching 19
4.5 Computation Complexity & Procedures of proposal 23
5.Simulation Result 25
5.1 Simulation Parameters for OFDM System 25
5.2 Algorithm Performance 26
5.3 Step Frequency Analysis 28
6.Conclusion 32
7.Reference 33

參考文獻

[1] J. Bingham, “Multicarrier modulation for data transmission: An idea whose time has come,” IEEE Commun. Mag., vol. 28, pp. 5-14, May 1990.
[2] Digital Audio Broadcasting (DAB) to Mobile, Portable, and Fixed Receiver ETSI Std. ETS 300 401, May 2001.
[3] Digital Video Broadcasting (DVB-T); Frame Structure, Channel Coding, and Modulation for Digital Terrestrial Television, ETSI Std. ETS 300744, Dec. 2001.
[4] Supplement to IEEE Std. 802.11, Wireless LAN Media Access Control(MAC) and Physical Layer (PHY) Specifications:High-SpeedPhysical Layer in the 5 GHZ Band, IEEE Std. 802.11a, 2001.
[5] Broadband Radio Access Network (BRAN): HIPERLAN Type 2 Functional Specification Part 1—Physical Layer, ETSI Std. ETS/BRAN 030003-1, June 1999.
[6] 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.
[7] M. Morelli and U. Mengali, “Carrier-frequency estimation for transmissions over selective channels,” IEEE Trans. Commun., vol. 48,no.9, Sept. 2000.
[8] W.-G. Song and J.-T. Lim, “Pilot-symbol aided channel estimation for OFDM with fast fading channels,” IEEE Trans. Broadcast., vol. 49, no. 4, pp. 398-402, Dec. 2003.
[9] T. Cui, C. Tellambura, and Y. Wu, “Low-complexity pilot-aidedchannel estimation for OFDM systems over doubly selective channels,” IEEE Int. Conf. Commun., vol.3, pp. 1980-1984, May 2005.
[10] H. Nguyen-Le and T. Le-Ngoc, “Pilot-aided joint CFO and doubly-selective channel estimation for OFDM transmissions,” IEEE Trans. Broadcast., vol. 56, no. 4, pp. 514-522, Dec. 2010.
[11] X. Ma, C. Tepedelenlioglu, G. B. Giannakis, and S.Barbarossa, ”Non-data-aided carrier offset estimation for OFDM with null subcarriers: identifiability, algorithms, and performance," IEEE Jour. Select. Areas Commun., vol. 19, no. 12, pp. 2504-2515, Dec. 2001.
[12] M. Ghogho and A. Swami, “Blind frequency-offset estimator for OFDM systems transmitting constant-modulus symbols," IEEE Commun. Lett., vol.6, no.8, pp. 343-345, Aug. 2002.
[13] Y. Yao and G. Giannakis, “Blind carrier frequency offset estimation in SISO, MIMO, and multiuser OFDM systems," IEEE Trans. Commun., vol. 53, pp. 173-183, Jan. 2005.
[14] T. Fusco, and M. Tanda, ”Blind synchronization for OFDM systems In multipath channels,” IEEE Trans. Wireless Commun., vol. 8, no. 3, pp. 1340-1348, Mar. 2009.
[15] H.-C.Wu, X. Huang, and D. Xu, “Pilot-free dynamic phase and amplitude estimations for wireless ICI self-cancellation coded OFDM systems,” IEEE Trans. Broadcast., vol. 51, no. 1, pp. 105-394, Mar. 2005.
[16] H.-C.Wu, “Analysis and characterization of intercarrier and interblock interferences for wireless mobile OFDM systems,” IEEE Trans. Broadcast., vol. 52, no. 2, pp. 203-210, Jun. 2006.
[17] X. Huang and H.-C.Wu, “Robust and efficient intercarrier interference mitigation for OFDM systems in time-varying fading channels,” IEEE Trans. Veh. Technol., vol. 56, no. 5, pp. 2517-2528, Sept. 2007.
[18] H.-C. Wu, X. Huang, Y. Wu, and X. Wang, “Theoretical studies and efficient algorithm of semi-blind ICI equalization for OFDM,” IEEE Trans. Wireless Commun., vol. 7, no. 10, pp. 3791-3798, Oct. 2008.
[19] 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.
[20] H. Jin and J. Moon, “Joint CFO, data symbol and channel response estimation in OFDM systems” IEEE Int. Conf. Commun, vol.3, pp. 2127-2133, May 2005.
[21] 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.
[22] Man-On Pun; Shang-Ho Tsai; Kuo, C.-C.J, “Joint maximum likelihood estimation of carrier frequency offset and channel in uplink OFDMA systems,” IEEE Global Telecommun. Conf., vol.6, pp. 3748-3752 Dec.2004.
[23] J. D. Markel, “FFT Pruning,” IEEE Trans. Audio Elect., vol.19, no.4 pp. 305-311, Dec. 1971.
[24] 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.

指導教授

陳永芳(Yung-Fang Chen)

審核日期

2012-7-19

推文