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研究生:羅振吉
研究生(外文):Chen-Chi Lo
論文名稱:架構在空時編碼通訊系統下之有限長度的決定迴授等化器設計
論文名稱(外文):Finite-Length Decision Feedback Equalization for Space-Time Block Coded Communication Systems
指導教授:馮世邁
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:電信工程學研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2007
畢業學年度:95
語文別:英文
論文頁數:65
中文關鍵詞:決定迴授等化器通訊系統空時編碼
外文關鍵詞:decision feedback equalizationspace-time block codecommunication systems
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Decision feedback equalization (DFE) is a well-established intersymbol interference mitigating technique for linear, noise, and dispersive channels. In this thesis, we discuss the finite length decision feedback equalization and present a new solution for the receiver based on the signal-to-interference and noise ratio (SINR) criterion. We also extend the DFE receiver concepts to space-time block-coded transmission over frequency-selective multi-input multi-output (MIMO) channels. The focus lies on Alamouti''s space-time block code with two transmit and only one receive antenna. Combined equalization and decoding scheme is presented under the constraint of linear processing complexity (no trellis search) at the receiver. Simulation is made over several channels including typical EDGE channels, and significant gains can be observed compared with a single-input single-output DFE scheme.
List of Tables.....vii
List of Figures.....viii
Abstract.....xi
Acknowledgements.....xiii

1 Introduction.....1

2 Channel Equalization.....5
2.1 Introduction to Channel Equalization.....6
2.2 Minimum Mean Square Error Equalizers.....7
2.3 MMSE Decision Feedback Equalizers.....13
2.4 Maximum Signal to Interference and Noise Ratio DFE.....20
2.5 Modified Decision Feedback Equalizers.....24
2.5.1 Constrained Decision Feedback Equalizers.....26
2.5.2 Soft Decision Feedback Equalizers.....29

3 MIMO Channel Equalization.....33
3.1 MIMO MMSE Decision Feedback Equalization.....34
3.2 Maximum SINR DFE.....40
3.3 Alamouti''s Space-Time Block Codes.....43
3.4 Equalization for Alamouti''s Codes.....45
3.4.1 Maximum SINR DFE for Alamouti''s Codes.....45
3.4.2 Delay-Optimized Maximum SINR DFE for Alamouti''s Codes.....52
3.5 Simulation and Performance Analysis.....53
3.5.1 Spatially Uncorrelated Fading Channel.....56
3.5.2 EDGE Power Delay Profiles.....57
4 Conclusion.....61

Bibliography.....63
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