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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 闕志達(Tzi-Dar Chiueh) | |
dc.contributor.author | Chun-Hao Liu | en |
dc.contributor.author | 劉峻豪 | zh_TW |
dc.date.accessioned | 2021-06-15T02:38:12Z | - |
dc.date.available | 2011-08-19 | |
dc.date.copyright | 2009-08-19 | |
dc.date.issued | 2009 | |
dc.date.submitted | 2009-08-12 | |
dc.identifier.citation | [1] 財團法人國家實驗研究院科技政策研究與資訊中心, “產業資訊服務電子報第151期”, Jan. 6, 2006.
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[15] Hyun Jong Yang and Joohwan Chun, 'Generalized Schur Decomposition-Based Two-Way Relaying for Wireless MIMO Systems,' IEEE Global Telecommunications Conference(GLOBECOM), pp.1-6, Dec. 2008. [16] Sigen Ye, Rick S. Blum, and Leonard J. Cimini, “Adaptive OFDM systems with imperfect channel state information,” IEEE Trans. Wireless Commun., vol. 5, no.11, Nov. 2006. [17] R. Narasimhan, “Performance of diversity schemes for OFDM systems with frequency offset, phase noise, and channel estimation errors,” IEEE Trans. Commun., vol. 50, pp. 1561–1565, Oct. 2002. [18] H. Cheon and D. Hong, “Effect of channel estimation error in OFDM based WLAN,” IEEE Commun. Lett., vol. 6, pp. 190–192, May. 2002. [19] Xiaozhou Huang, Hsiao-Chun Wu, 'Robust and Efficient Intercarrier Interference Mitigation for OFDM Systems in Time-Varying Fading Channels,' IEEE Transactions on Vehicular Technology, vol. 56, issue 5, pp. 2517-2528, Sep. 2007. [20] Gabriele Dona and Witold A. Krzymien, “MMSE channel estimation using two-dimensional filtering in rapid time-variant environments,” in Proc. of IEEE Vehicular Technology Conference, pp. 490-494, Sep. 2005. [21] Volker Fischer, Alexander Kurpiers and Dominik Karsunke, “ICI reduction method for OFDM systems,” Proc. of 8th International OFDM-Workshop, Sep. 2003. [22] Lin Jun-Wei, “Design of an Adaptive OFDM System for Mobile Wireless Communication,” Master Thesis, Dept. of Electrical Engineering, NTU, Taipei, Taiwan, 2008. [23] Alexandra Duel-Hallen, Hans Hallen, and Tung-Sheng Yang, “Long range prediction and reduced feedback for mobile radio adaptive OFDM systems,” IEEE Trans. Wireless Commun., vol. 5, no. 10, pp. 2723-2733, Oct. 2006. [24] Dieter Schafhuber and Gerald Matz, “MMSE and adaptive prediction of time-varying channels for OFDM systems,” IEEE Trans. Wireless Commun., vol. 4, no. 2, pp. 593-602, March 2005. 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[30] Najoua ACHOURA, and Ridha BOUALLEGUE, “Multi-user detection for MIMO-OFDM system using joint adaptive Beamforming,” IEEE International Conference on Information and Communication Technologies: From Theory to Applications (ICTTA), pp. 1-5, Apr. 2008. [31] Stephen Boyd, and Lieven Vandenberghe, Convex Optimization, Cambridge University Press, 2004. [32] Chung-Jin Tsai, “IQ Imbalance and Phase Noise Mitigation for Wireless MIMO-OFDM Systems,” Master Thesis, Dept. of Electrical Engineering, NTU, Taipei, Taiwan, 2008. [33] Charlie Hsiao, “Design and Implementation of a Baseband Receiver for 802.11n & 802.16e Dual Mode MIMO OFDM/OFDMA,” Master Thesis, Dept. of Electrical Engineering, NTU, Taipei, Taiwan, 2008. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/44060 | - |
dc.description.abstract | 為滿足下個世代無線通訊傳輸的高頻譜使用率,高效率以及低錯誤率傳輸的要求,多輸入多輸出正交分頻多工(MIMO-OFDM)的技術應運而生。甚者,要是我們能透過聯合傳送機與接收機做波束合成的同步設計,不但可以更進一步充分利用通道資訊(CSI),而且使得設計複雜度合適地分配在傳送機與機收機。
傳統的聯合波束合成設計通常假設在靜態或是低速移動的通道環境下進行設計。本論文針對這點,將其重點擴展到高速移動的環境下做設計,並且使用最佳化(optimization)技巧和遞迴式平行干擾消除法(iterative parallel interference cancellation)同時對抗由MIMO系統產生的天線間干擾(inter-antenna interference)和由OFDM系統產生的載波間干擾(inter-carrier interference)。 本論文另一個重點在於考慮傳統聯合波束合成設計假設上的缺點-假設在傳送端與接收端擁有完美的通道資訊。事實上通道資訊在接收端被估測後會有估測誤差(estimation error),回傳通道資訊給傳送端也會有回傳延遲(feedback delay)。針對這些不完美的通道資訊,我們不僅評估了它們對聯合波束合成的影響,還提出了使用低複雜度(low complexity)的通道預估(channel prediction)技巧對回傳延遲做補償,例如用一個聯合計算架構(joint calculation structure)可以大大降低所需運算複雜度,或是採用快速收斂的遞迴式可抗噪性演算法。最後搭配外傳送機與接收機(outer transceiver),本系統可以更進一步達到高水準的系統效能。 | zh_TW |
dc.description.abstract | In order to satisfy several advantages such as high utility rate of frequency spectrum, high efficiency of transmission rate and low error rate in wireless communication systems, MIMO-OFDM has been proposed for many years as a hot topic to achieve high quality of service. Furthermore, if we can design transmitter and receiver synchronously using joint beamforming technique, in addition to take full advantage of channel state information (CSI), we can also distribute design complexity on both transmitter and receiver appropriately.
Traditionally, joint beamforming technique is usually designed under static or low mobility channel assumption. Our thesis focuses on channel condition with high mobility, and we use optimization technique with iterative parallel interference cancellation scheme to oppose inter-antenna interference from MIMO system and inter-carrier interference from OFDM system simultaneously. Another point in this thesis is considering the drawback of traditional joint beamforming design-assuming perfect CSI on both TX and RX. In fact, estimation error occurs after CSI is estimated in RX, and feedback CSI from RX to TX will cause feedback delay. In the light of these drawbacks, we not only evaluate the influence of these effects on joint beamforming, we also propose using low complexity channel prediction scheme to compensate for feedback delay, such as a joint calculation structure to greatly reduce computational complexity, or a recursive algorithm which can oppose noise in a high convergence rate. Finally, cascading with an outer transceiver, our system can further achieve a high level performance. | en |
dc.description.provenance | Made available in DSpace on 2021-06-15T02:38:12Z (GMT). No. of bitstreams: 1 ntu-98-R96943028-1.pdf: 1771946 bytes, checksum: fdedd1daab9cebc47fc938e3986556f6 (MD5) Previous issue date: 2009 | en |
dc.description.tableofcontents | 第一章 緒論.............................................1
1.1. 研究背景.......................................1 1.2. 研究動機.......................................3 1.3. 論文簡介.......................................4 1.4. 論文組織介紹...................................5 第二章 系統介紹.........................................7 2.1. 多輸入多輸出系統...............................7 2.1.1. 系統介紹.......................................8 2.1.1.1. 系統模型.......................................8 2.1.1.2. 通道容量.......................................9 2.1.2. 多輸入多輸出傳輸技術..........................11 2.1.2.1. 時空編碼......................................11 2.1.2.2. 空間多工......................................12 2.2. 波束合成介紹..................................13 2.2.1. 傳統波束合成技術..............................13 2.2.2. 聯合傳送機與接收機波束合成技術................16 2.3. 正交分頻多工系統..............................17 2.3.1. 系統介紹......................................17 2.3.2. 載波間干擾簡介................................21 第三章 通道模型.......................................27 3.1. 多重路徑瑞雷衰減通道..........................27 3.2. 多輸入多輸出通道模型..........................29 3.3. 加成性白色高斯雜訊............................31 第四章 聯合傳送機與接收機波束合成設計.................33 4.1. 系統架構......................................33 4.2. 外傳送機與接收機架構..........................36 4.3. 接收機波束合成設計............................39 4.4. 傳送機波束合成設計............................43 4.5. 平行干擾消除法輔助聯合波束合成設計............54 4.6. 模擬結果與比較................................55 第五章 聯合波束合成在不完美通道資訊下之設計...........69 5.1. 回傳延遲......................................69 5.2. 通道估測誤差..................................72 5.3. 通道預估......................................73 5.3.1. 線性預測器....................................74 5.3.2. 平移不變特性..................................74 5.3.3. 通道預測器係數................................76 5.3.3.1. MMSE 解法.....................................77 5.3.3.2. 聯合計算架構..................................82 5.3.4. 可適性解法....................................85 5.3.4.1. 最小均方(Least Mean Squares)預測法............86 5.3.4.2. 遞迴最小平方(Recursive Least Squares)預測法...86 第六章 結論與展望.....................................93 參考文獻...............................................95 | |
dc.language.iso | zh-TW | |
dc.title | 行動式多輸入多輸出正交分頻多工系統中聯合傳送機與接收機波束合成之設計 | zh_TW |
dc.title | Design of Joint Transmitter-Receiver Beamforming in Mobile MIMO OFDM Systems | en |
dc.type | Thesis | |
dc.date.schoolyear | 97-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 李學智(Hsueh-Jyh Li),蔡佩芸(Pei-Yun Tsai) | |
dc.subject.keyword | 聯合波束合成, | zh_TW |
dc.subject.keyword | Joint Beamforming, | en |
dc.relation.page | 98 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2009-08-12 | |
dc.contributor.author-college | 電機資訊學院 | zh_TW |
dc.contributor.author-dept | 電子工程學研究所 | zh_TW |
顯示於系所單位: | 電子工程學研究所 |
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