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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 林茂昭(Mao-Chao Lin) | |
| dc.contributor.author | Lu-Chi Lin | en |
| dc.contributor.author | 林律綺 | zh_TW |
| dc.date.accessioned | 2022-11-23T09:15:15Z | - |
| dc.date.available | 2021-08-13 | |
| dc.date.available | 2022-11-23T09:15:15Z | - |
| dc.date.copyright | 2021-08-13 | |
| dc.date.issued | 2021 | |
| dc.date.submitted | 2021-08-02 | |
| dc.identifier.citation | [1] L., Deng, Z., Chen and Y., Zhao, “Basis expansion model for channel estimation in LTE-R communication system,” Digital communications and networks, vol. 2, no. 2, pp. 92-96, 2016. [2] M. Visintin, “KarhunenLoève expansion of a fast Rayleigh fading process,” IEEE Electron. Lett., vol. 32, 8:1712-1713, Aug, 1996. [3] M. K. Tsatsanis and G. B. Giannakis, “Modeling and equalization of rapidly fading channels,” Int. J. Adapt. Control Signal Process., vol. 10, pp. 159–176, Mar. 1996. [4] D. K. Borah and B. D. Hart, “Frequency-selective fading channel estimation with a polynomial time-varying channel model,” IEEE Trans. Commun., vol. 47, no. 6, pp. 862–873, June 1999. [5] E. P. Simon and M. A. Khalighi, “Iterative soft-kalman channel estimation for fast time-varying MIMO-OFDM channels,” IEEE Wireless Communications Letters, vol. 2, no. 6, pp. 599-602, 2013. [6] Y. Chen, “Code Assisted Channel Estimation for coded-OFDM Systems over Multipath Fast-Fading Channel,” National Taiwan University, Taiwan, 2020. [7] YangSeok Choi, P. J. Voltz and F. A. Cassara, “On channel estimation and detection for multicarrier signals in fast and selective Rayleigh fading channels,” IEEE Transactions on Communications, vol. 49, no. 8, pp. 1375-1387, 2001. [8] D. R. Morgan, “Analysis and realization of an exponentially-decaying impulse response model for frequency-selective fading channels,” IEEE Signal Processing Letters, vol. 15, pp. 441-444, 2008. [9] Y. Zheng and C. Xiao, “Improved models for the generation of multiple uncorrelated Rayleigh fading waveforms,” IEEE Commun. Lett., 6.6:256-258, 2002. [10] T. Kashima, K. Fukawa and H. Suzuki, “Adaptive map receiver via the em algorithm and message passings for MIMO-OFDM mobile communications,” IEEE Journal on Selected Areas in Communications, vol. 24, no. 3, pp. 437-447, March 2006. [11] 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, pp. 2226-2238, May 2007. [12] H. Lee, C. A. Gong, and P. Chen, “A compressed sensing estimation technique for doubly selective channel in ofdm systems,” IEEE Access, 7:115192–115199, 2019. [13] HAWKINS and Douglas M., “The problem of overfitting,” Journal of chemical information and computer sciences, 44.1:1-12, 2004. [14] Jon Mark and Weihua Zhuang, “Wireless Communications and Networking,” Prentice Hall. p. 139, 2003. [15] Sari, H., Karam, G., and Jeanclaud, I., “Frequency-domain equalization of mobile radio and terrestrial broadcast channels.” In IEEE GLOBECOM. Communications: The Global Bridge, pp. 1-5, 1994. [16] X. Ma, F. Yang, S. Liu, J. Song and Z. Han, “Sparse channel estimation for MIMO-OFDM systems in high-mobility situations,” IEEE Trans. Veh. Technol., vol. 67, no. 7, pp. 6113-6124, Jul. 2018. [17] Tse, D., and Viswanath, P., Fundamentals Wireless Communication. Cambridge university press, 2005. [18] K. F. Lee and D. B. Williams, “A space-frequency transmitter diversity technique for OFDM systems,” IEEE Conference on Global Telecommunications, vol. 3, pp. 1473-1477, 2000. [19] Wübben, Dirk and Yidong Lang, “Generalized sum-product algorithm for joint channel decoding and physical-layer network coding in two-way relay systems,” 2010 IEEE Global Telecommunications Conference GLOBECOM 2010 vol. 3, pp. 1-5, IEEE, 2010. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/79884 | - |
| dc.description.abstract | 由於正交分頻多工可有效對抗多重路徑衰落通道，因而被廣泛地運用在許多無線通訊系統中。然而，快速衰落通道會對正交分頻多工系統產生載波間干擾。許多近期的研究顯示，在多路徑快衰落通道下的通道估測，為降低載波間干擾的影響，需要成群的引導信號和跨多個符元的長時間觀測以達到較好的準確率。 根據先前研究中提出針對有嚴重都普勒效應之多路徑快速時變通道，結合錯誤更正碼使得接收端能將解碼資訊和對數概似比迭代傳回以協助估測的方法，本篇論文改良並考慮相鄰子載波間頻率通道響應的連續性，用以在一個正交分頻多工符元時間長度下僅利用多個孤立引導信號得到更準確的估測結果。由於多路徑快速衰落通道的通道估測可在一個符元時間利用多個孤立的引導信號完成，我們將此方法靈活延伸至各種多樣性中。論文中介紹可達到空間多樣性的多天線無線通訊系統，結合前述通道估測方法，以降低通道估測所需的遞迴次數並達到較好的準確率。最後，在單天線系統中若允許較長的偵測延遲，我們加入跨多個符元長度的低密度奇偶檢查碼作為內碼，達到時間多樣性並得到較佳的錯誤率表現。 | zh_TW |
| dc.description.provenance | Made available in DSpace on 2022-11-23T09:15:15Z (GMT). No. of bitstreams: 1 U0001-3007202119251600.pdf: 4294968 bytes, checksum: 37366083736c9dcbe24340505f413122 (MD5) Previous issue date: 2021 | en |
| dc.description.tableofcontents | 致謝 (i) 中文摘要 (ii) Abstract (iii) Contents (v) List of Figures (vii) List of Tables (x) Chapter 1 Introduction (1) Chapter 2 Wireless Communication Channel (4) 2.1 Multipath Fading Channel (4) 2.2 Time-Varying Fading Channel (8) 2.3 Channel Model (9) Chapter 3 Coded OFDM System (12) 3.1 Transceiver Overview (13) 3.2 Polynomial-Basis Expansion Model (18) 3.3 Frequency-Domain Equalization Techniques (23) 3.3.1 Comparisons with Channel Matrices (23) 3.3.2 Equalization Techniques (27) 3.4 Pilot Tones Allocation (30) 3.5 Codeword Arrangement (34) 3.5.1 Codeword Arrangement and Sub-block Length Analysis (34) 3.5.2 Time-Domain FEC Code Implementation (39) Chapter 4 Low-Latency Channel Estimation (43) 4.1 Core Concept (43) 4.2 Continuity of Channel Frequency Response Between Neighboring Subcarriers (47) 4.3 LMMSE Based Estimator (52) Chapter 5 MIMO System (60) 5.1 Introduction to MIMO (60) 5.2 Coded MIMO-OFDM System (62) 5.3 Discussion in 2Tx1Rx MISO Scheme (69) 5.3.1 Space Frequency Block Code (69) 5.3.2 Multiple Access (74) Chapter 6 Conclusions and Future Works (81) References (83) | |
| dc.language.iso | en | |
| dc.subject | 多輸入多輸出系統 | zh_TW |
| dc.subject | 多重路徑快速衰落通道 | zh_TW |
| dc.subject | 正交頻分多工 | zh_TW |
| dc.subject | 低密度奇偶檢查碼 | zh_TW |
| dc.subject | 通道估測 | zh_TW |
| dc.subject | LDPC codes | en |
| dc.subject | Multipath fast-fading channel | en |
| dc.subject | OFDM systems | en |
| dc.subject | MIMO systems | en |
| dc.subject | channel estimation | en |
| dc.title | 適用於多路徑快速時變通道中多天線正交分頻多工系統的低延遲通道估測方法 | zh_TW |
| dc.title | Low-Latency Channel Estimation for MIMO-OFDM System in Multipath Fast Fading Channel | en |
| dc.date.schoolyear | 109-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.coadvisor | 李晃昌(Huang-Chang Li) | |
| dc.contributor.oralexamcommittee | 呂忠津(Hsin-Tsai Liu),趙啟超(Chih-Yang Tseng),蘇育德 | |
| dc.subject.keyword | 多重路徑快速衰落通道,正交頻分多工,低密度奇偶檢查碼,通道估測,多輸入多輸出系統, | zh_TW |
| dc.subject.keyword | Multipath fast-fading channel,OFDM systems,LDPC codes,channel estimation,MIMO systems, | en |
| dc.relation.page | 85 | |
| dc.identifier.doi | 10.6342/NTU202101951 | |
| dc.rights.note | 同意授權(全球公開) | |
| dc.date.accepted | 2021-08-03 | |
| 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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| 檔案 | 大小 | 格式 | |
|---|---|---|---|
| U0001-3007202119251600.pdf | 4.19 MB | Adobe PDF | 檢視/開啟 |
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