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研究生： 詹怡婷
Yi-Ting Chang
論文名稱： 使用決定回授檢測之相差空時調變的
A Coherent-Approaching Property ofDifferential Space-Time ModulationUsing Decision Feedback Detection
指導教授： 魏瑞益
Ruey-Yi Wei
口試委員:
學位類別： 碩士
Master
系所名稱： 資訊電機學院 - 通訊工程學系
Department of Communication Engineering
畢業學年度： 93
語文別： 英文
論文頁數： 83
中文關鍵詞： 空時碼 、多樣性 、相差空時調變 、多碼字解碼 、決定回授 、錯誤蔓延
外文關鍵詞： differential space time modulation (DSTM), diversity, space-time code, multiple symbol, decision feedback, error propagation
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    • 在這篇論文中，吾人在接收端採用決定回授檢測相差編碼技術的
    前提下定義趨近同調相差空時調變碼，並且提出趨近同調相差空
    時調變碼之性質。此性質即為判斷相差空時調變碼之充份條件。
    最後以典型的相差空時調變碼為例，模擬分析其同調偵測趨近性
    質。

    In this thesis, decision-feedback differential detection (DF-DD)
    receiver is applied and decision-feedback approaching-coherent
    differential space-time modulation (DFAC-DSTM) code is defined.
    One of its properties is proposed, which is the sufficient
    condition ofDFAC-DSTM codes. Analytical results of classic DSTM
    codeword sets confirm the interpretation of the proposed property.

    Contents 1 Introduction 1 2 Reviews of Differential Unitary Space-Time Modulation 3 2.1 Multiple Antennas In Unknown Rayleigh Flat Fading 3 2.1.1 Notation 3 2.1.2 Rayleigh Flat-Fading Channel Model 4 2.1.3 Unitary Space-Time Modulation 5 2.2 Standard Single-Antenna Differential Modulation 9 2.3 System Model of Uncoded DSTM 12 2.3.1 Signal Requirements for Differential Modulation 12 2.3.2 Differential Space-Time Modulator 14 2.3.3 Differential Reception 16 2.4 Connection Between Unknown And Known Channel 18 2.4.1 Known Channel 18 2.4.2 Connection Between Signal Designs 19 2.4.3 Connection Between Demodulation Strategies 21 3 Coherent-Approaching Differential Space-Time Modulation 23 3.1 Properties of Coherent-Approaching Differential Space-Time Modulation 23 3.2 Some DFAC-DSTM Code 26 3.2.1 Group Constellations 26 A. Group Conditions 26 B. Unitary Group Codes 28 C. Diagonal Code 31 3.3 Non-DFAC-DSTM Code 37 3.3.1 TJ’s DSTBC 37 3.3.2 Unitary Space-Time Codes From Alamouti’s SchemeWith APSK Signal 41 3.3.3 Parametric Codes 52 3.4 Trellis-Coded DSTM Coding Scheme 54 3.4.1 Modified TJ’s DSTM Scheme 52 3.4.2 DSTM Based on Generalized Multi-channel Amplitude And Phase Modulation 62 4 Conclusions 70

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