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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/82143完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 馮世邁(See-May Phoong) | |
| dc.contributor.author | Po-Han Chen | en |
| dc.contributor.author | 陳柏翰 | zh_TW |
| dc.date.accessioned | 2022-11-25T05:36:47Z | - |
| dc.date.available | 2026-10-01 | |
| dc.date.copyright | 2021-11-06 | |
| dc.date.issued | 2021 | |
| dc.date.submitted | 2021-10-04 | |
| dc.identifier.citation | [1] Y.-P. Lin, S.-M. Phoong, and P. P. Vaidyanathan, Filter Bank Transceivers for OFDM and DMT Systems. Cambridge University Press, 2010. [2] G. B. Giannakis and C.Tepedelenlioglu,“Basis expansion models and diversity techniques for blind identification and equalization of time-varying channels,” Proc. IEEE, vol. 86, no. 10, pp. 1969–1986, Oct. 1998. [3] Z. Tang, R. C. Cannizzaro, G. Leus, and P. Banelli, “Pilot-Assisted Time-Varying Channel Estimation for OFDM Systems,” IEEE Trans. Signal Process., vol. 55, no. 5, pp. 2226–2238, May 2007. [4] F. Rottenberg, X. Mestre, F. Horlin, and J. Louveaux, “Efficient equalization of time-varying channels in MIMO OFDM systems,” IEEE Trans. Signal Process., vol. 67, no. 21, pp. 5583–5595, 2019. [5] P. Schniter, “Low-complexity equalization of OFDM in doubly selective channels,” IEEE Trans. Signal Processing, vol. 52, pp. 1002-1011, Apr. 2004. [6] L. Rugini, P. Banelli, and G. Leus, “Simple equalization of time-varying channels for OFDM,” IEEE Commun. Lett., vol. 9, no. 7, pp. 619–621, Jul. 2005. [7] S.-S. Li and S.-M. Phoong, “Blind estimation of multiple carrier frequency offsets in OFDMA uplink systems employing virtual carriers,” IEEE Access, vol. 8, pp. 2915–2923, 2020. [8] Y. C. Wang and S. M. Phoong, “Blind CFO estimation in OFDMA uplink transmission with general carrier assignment scheme,” IEEE Communications Letters, vol. 22, no. 5, pp. 1014-1017, May 2018. [9] W. Guo, W. Zhang, P. Mu, and F. Gao, “High-mobility OFDM downlink transmission with large-scale antenna array,” IEEE Transactions on Vehicular Technology, vol. 66, no. 9, pp. 8600–8604, 2017. [10] Y. Feng, W. Zhang, F. Gao, and Q. Sun, “Computationally efficient blind CFO estimation for massive MIMO uplink,” IEEE Transactions on Vehicular Technology, vol. 67, no. 8, pp. 7795–7799, 2018. [11] Q. Qin, L. Gui, B. Gong, X. Ren and W. Chen, 'Structured Distributed Compressive Channel Estimation Over Doubly Selective Channels', IEEE Transactions on Broadcasting, vol. 62, no. 3, pp. 521-531, 2016. [12] J. Rosen and L. Q. Gothard, Encyclopedia of physical science. New York, NY: Facts on File, 2010. [13] P. Dent, G. E. Bottomley, and T. Croft, “Jakes fading model revisited,” Electronics letters, vol. 29, no. 13, pp. 1162-1163, 1993. [14] T.-D. Chiueh, P.-Y. Tsai, and L. I-Wei, Baseband receiver design for wireless MIMO-OFDM communications. Wiley Online Library, 2012. [15] J.H. Hubbard and B.B. Hubbard, Vector calculus, linear algebra, and differential forms: a unified approach. Prentice Hall, New Jersey, 1999. [16] G. H. Golub and C. F. Van Loan, Matrix Computations, 3rd ed. The Johns Hopkins University Press, 1996. [17] C. A. Balanis, Antenna theory - analysis and design, fourth edition, John Wiley Sons, Inc., ISBN: 978-1-118-642060-1. [18] K. S. Ahn and R. W. Heath, “Performance analysis of maximum ratio combining with imperfect channel estimation in the presence of cochannel interferences,” IEEE Transactions on Wireless Communications, vol. 8, no. 3, pp. 1080–1085, 2009. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/82143 | - |
| dc.description.abstract | 正交分頻多工系統已被廣泛地應用在許多通訊系統中。在接收端使用單通道等化器即可良好的消除多路徑效應造成的符碼干擾。然而，當考慮了裝置的高速移動，通道將具有雙選擇性，此時傳統的接收機將不足以應付。因此，近來許多文獻著重在正交分頻多工系統在雙選擇性通道下的問題。 本文中，考慮了兩種雙選擇性通道模型。當時變效應不嚴重的情況下，通道可以用第一種模型—複指數基底擴展模型來表示。針對此模型的特殊結構，我們的目標是設計一個低複雜度的等化器。我們提出一個低複雜度的近似方法來簡化強制歸零等化器。並且，提出一種新型的混合等化器，以及它的低複雜度近似。實驗結果顯示，我們的方法能以較少的實現成本達到滿意的錯誤率表現。 另外，我們基於分接延遲線模型，提出一個新的時變通道模型。此模型以少量的都卜勒頻率偏移參數，即能有效的描繪都卜勒效應。對於此模型，我們聚焦在都卜勒頻率偏移的估測及接收器設計。我們推導出等效的離散時間上行傳輸雙選擇性通道模型。接著，我們利用天線陣列來接收信號，提出一個盲蔽估測都卜勒頻率偏移的方法。我們將考慮均勻線性陣列及均勻平面陣列。除此之外，我們也提出了兩種對應的等化器。在我們的實驗結果中，使用均勻線性陣列的估測器與接收機有良好的均方誤差及錯誤率表現。此外，使用了均勻平面陣列之後的效能，有更進一步的提升。 | zh_TW |
| dc.description.provenance | Made available in DSpace on 2022-11-25T05:36:47Z (GMT). No. of bitstreams: 1 U0001-0110202101164300.pdf: 3266946 bytes, checksum: f108c0adf0d027f900edfbddc72b4338 (MD5) Previous issue date: 2021 | en |
| dc.description.tableofcontents | 誌謝 i 中文摘要 ii Abstract iii Contents v List of Figures vii List of Tables ix Chapter 1 Introduction 1 Chapter 2 Doubly Selective Channel Models for OFDM Systems 5 2.1 Doubly Selective Channels 5 2.1.1 Doubly Selective Channels in Single Carrier Systems 5 2.1.2 Doubly Selective Channels in OFDM Systems 7 2.2 CE-BEM of Doubly Selective Channel in OFDM 9 2.2.1 CE-BEM 10 2.2.2 CE-BEM of OFDM Systems 10 2.3 The Proposed TDL Model for Doubly Selective Channel in OFDM 11 2.3.1 Equivalent DT Channel Model 14 2.3.2 Equivalent DT Channel Model in OFDM 18 2.4 Simulation Results 19 2.5 Concluding Remarks 22 Chapter 3 Low-Cost Equalization of CE-BEM Doubly Selective Channels in OFDM 23 3.1 Equalization of BEM Channels in OFDM Systems 23 3.2 Proposed Low-Cost Equalizers for Doubly Selective Channels 25 3.2.1 Proposed Low-Cost Approximation of The ZF Equalizer 25 3.2.2 Proposed Hybrid Equalizer and Its Low-Cost Approximation 26 3.3 Implementation Structure 27 3.3.1 Complexity Analysis 28 3.4 Simulation Results 30 3.5 Concluding Remarks 37 Chapter 4 DFO Estimation and Receiver Design for TDL Doubly Selective Channels in OFDM 39 4.1 TDL Doubly Selective Channel in OFDM with Antenna Array 39 4.1.1 Equivalent DT Channel Model for ULA 40 4.1.2 Equivalent DT Channel Model for UPA 44 4.1.3 Equivalent DT Channel Model in OFDM with Antenna Array 45 4.2 Blind Estimation of Doppler Frequency Offsets (DFO) 47 4.3 Receiver Design 49 4.3.1 Efficient Receiver 49 4.3.2 Pseudo-Inverse Receiver 51 4.3.3 Complexity Analysis 52 4.4 Simulation Results 54 4.5 Concluding Remarks 64 Chapter 5 Conclusions 65 Bibliography 67 | |
| dc.language.iso | en | |
| dc.subject | 通道等化 | zh_TW |
| dc.subject | 督卜勒頻率估測 | zh_TW |
| dc.subject | 正交分頻多工系統 | zh_TW |
| dc.subject | 接收器設計 | zh_TW |
| dc.subject | 雙選擇性通道 | zh_TW |
| dc.subject | receiver design | en |
| dc.subject | doubly selective channel | en |
| dc.subject | OFDM systems | en |
| dc.subject | channel equalization | en |
| dc.subject | DFO estimation | en |
| dc.title | 於正交分頻多工系統中雙選擇性通道之研究 | zh_TW |
| dc.title | A Study on Doubly Selective Channels in OFDM Systems | en |
| dc.date.schoolyear | 109-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 蘇柏青(Hsin-Tsai Liu),劉俊麟(Chih-Yang Tseng) | |
| dc.subject.keyword | 雙選擇性通道,正交分頻多工系統,通道等化,督卜勒頻率估測,接收器設計, | zh_TW |
| dc.subject.keyword | doubly selective channel,OFDM systems,channel equalization,DFO estimation,receiver design, | en |
| dc.relation.page | 69 | |
| dc.identifier.doi | 10.6342/NTU202103484 | |
| dc.rights.note | 同意授權(限校園內公開) | |
| dc.date.accepted | 2021-10-05 | |
| 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 |
| dc.date.embargo-lift | 2026-10-01 | - |
| 顯示於系所單位： | 電信工程學研究所 | |
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