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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 張進福 | |
| dc.contributor.author | Yao-Jen Liang | en |
| dc.contributor.author | 梁耀仁 | zh_TW |
| dc.date.accessioned | 2021-06-15T05:26:22Z | - |
| dc.date.available | 2011-07-16 | |
| dc.date.copyright | 2010-07-16 | |
| dc.date.issued | 2010 | |
| dc.date.submitted | 2010-07-15 | |
| dc.identifier.citation | [1] K. Shi, E. Serpedin, and P. Ciblat, “Decision-directed fine synchronization in OFDM systems,” IEEE Trans. Commun., vol. 53, no. 3, pp. 408–412, 2005.
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/46735 | - |
| dc.description.abstract | 本研究主要探討了高速無線通訊系統中的多通道路逕干擾及時變通道效應。在超高速通訊環境下，多路徑通道造成的碼間干擾(Inter-Symbol Interference)和都普勒飄移產生的載波間干擾(Inter-Carrier Interference)對多天線系統(Multiple antenna system)和正交分頻多工(Orthogonal Frequency-Division Multiplexing)系統的效能表現有著嚴重的影響。這篇論文除了針對前述兩個傳輸技術作深入的探討，並研究了多用戶(Multiple User)多天線系統下的下行廣播通道(Downlink Broadcasting Channel)之傳送端前置訊號處理(Preprocessing)和整合式的多重輸出多重輸入正交分頻多工(MIMO-OFDM)系統的通道估測和頻率飄移問題。
研究方法主要經由相關文獻的回顧，再利用統計和訊號處理技巧對上述問題提出可能的解決方法並以電腦模擬來驗證方法的優越性。 | zh_TW |
| dc.description.abstract | This research studies the multi-path interference and time varying channel effect due to very high mobility terminals and provides possible solutions. The critical issues in very high mobility wireless communications are inter-symbol interference (ISI) due to multi-path fading and inter-carrier interference (ICI) due to oscillator mismatch and high Doppler shift. Two transmission techniques (orthogonal frequency division multiplexing, OFDM and multiple-input multiple-output, MIMO) are considered in this thesis. In addition to discussing the above mentioned techniques individually, we also study the multi-user MIMO preprocessing for broadcasting channels (BCs) and the MIMO-OFDM technique, which attracts much attention in both academic and industry.
Through surveying literatures, we use statistical and signal processing techniques to derive our algorithms and demonstrate our superiorities by computer simulations. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-15T05:26:22Z (GMT). No. of bitstreams: 1 ntu-99-D93942015-1.pdf: 1153801 bytes, checksum: 969eb113ebf228cbb62cd22233125e62 (MD5) Previous issue date: 2010 | en |
| dc.description.tableofcontents | Abstract i
Acknowledgements ii List of Figures vi List of Tables viii Abbreviations ix 1 Introduction 1 1.1 Wireless Communications 1 1.2 Mobile Channel Model 3 1.3 Overview 5 1.4 Motivation and Contributions 6 1.4.1 Motivation 6 1.4.2 Contributions of This Thesis 7 1.5 Thesis Outlines 8 1.6 Notations 10 2 Joint Carrier and Sampling Frequency Offset Compensator in OFDM Systems 11 2.1 Introduction 11 2.2 System Model 12 2.3 Proposed Algorithm 14 2.3.1 CFO and SFO estimation 14 2.3.2 Proposed Joint CFO and SFO Compensation Scheme 15 2.4 Performance Analysis 17 2.4.1 Joint CFO and SFO estimator 17 2.4.2 Closed loop 18 2.4.3 Complexity Comparison with [1] 18 2.5 Simulation Results 19 2.6 Conclusions 21 3 Joint Carrier Frequency Offset Estimation and Signal Detection in MIMO BLAST Systems 22 3.1 Introduction 22 3.2 System Model And Relevant Algorithms 24 3.2.1 System Model 24 3.2.2 Review of CFO Estimation Algorithms 27 3.2.3 Review of Relevant Detection Algorithms 28 3.3 Proposed Algorithms 31 3.3.1 Frequency Offset Estimation 31 3.3.2 Joint Frequency Offset Estimation and Signal Detection (JFESD) 33 3.3.3 Complexity Analysis 37 3.4 Simulation Results 38 3.5 Conclusions 45 3.6 Appendix 47 3.6.1 Description of (3.3): 47 3.6.2 Derivation of (3.14): 48 4 Stream-Level Transmit Preprocessing Scheme for Multiuser MIMO Downlink Communications 49 4.1 Introduction 49 4.2 System Model 51 4.3 Existing ZF and SJNR Methods 52 4.3.1 ZF Scheme 52 4.3.2 SJNR Scheme 53 4.3.3 Enhanced-SJNR Scheme 54 4.4 Proposed Algorithm 55 4.5 Simulation Results 58 4.6 Conclusions 60 5 Joint Frequency Offset and Channel Estimation for MIMO OFDM Systems 61 5.1 Introduction 61 5.2 System Model 63 5.3 Proposed Algorithm and Performance Analysis 65 5.3.1 Algorithm Derivation 65 5.3.2 Performance Analysis 68 5.4 Simulations Results 69 5.5 Conclusion 73 5.6 Appendix 74 5.6.1 Derivation of (5.5) 74 5.6.2 Derivation of the MSE of channel (5.17) 74 6 Conclusions and Future Directions 77 Bibliography 80 | |
| dc.language.iso | en | |
| dc.subject | 頻率偏移 | zh_TW |
| dc.subject | 正交分頻多工 | zh_TW |
| dc.subject | 多重輸入多重輸出 | zh_TW |
| dc.subject | 通道估測 | zh_TW |
| dc.subject | OFDM | en |
| dc.subject | MIMO | en |
| dc.subject | frequency offest | en |
| dc.subject | channel estimation | en |
| dc.title | 多天線正交分頻多工系統之頻率補償與資料估測 | zh_TW |
| dc.title | Frequency Synchronization and Data Detection in MIMO and OFDM Systems | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 98-2 | |
| dc.description.degree | 博士 | |
| dc.contributor.oralexamcommittee | 陳光禎,張時中,許大山,溫志宏,張正尚 | |
| dc.subject.keyword | 正交分頻多工,多重輸入多重輸出,頻率偏移,通道估測, | zh_TW |
| dc.subject.keyword | OFDM,MIMO,frequency offest,channel estimation, | en |
| dc.relation.page | 88 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2010-07-16 | |
| 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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