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研究生： 李秉寰
Ping-Hwan Lee
論文名稱： 使用振幅相位鍵移之么正空時調變
Unitary Space-Time Modulation using Amplitude Phase-Shift Keying
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： 96
語文別： 英文
論文頁數： 57
中文關鍵詞： 么正空時調變，振幅相位鍵移，碼搜尋
外文關鍵詞： searched codes, amplitude phase-shift keying, unitary space-time modulation
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    • 在2000年，一個使用相位鍵移(phase shift-keying, PSK)訊號之么正空時調變(unitary space-time modulation, USTM)之系統化設計被提出。在此篇論文中，我們提出三種使用振幅相位鍵移(amplitude phase-shift keying)訊號之么正空時調變架構。我們使用電腦去搜尋具有最大分集乘積 ζ的么正空時碼。相較於過去所提出的架構，在第一和第三種架構下，我們搜尋到有著較佳分集乘積的么正空時碼。模擬結果證實我們所搜尋到的么正空時碼相較於之前所提出的架構，有著較佳的錯誤率效能表現。

    A systematic design of unitary space-time modulation using phase shift-keying (PSK) signals was proposed in 2000. In this thesis, we propose three schemes of unitary space-time modulation (USTM) that use amplitude phase-shift keying (APSK) signal points. We utilize the computer to search codes in USTM that maximize the diversity product ζ. Several of searched codes in Scheme 1 and Scheme 3 have better diversity product ζ than the codes for the proposed scheme in 2000. Simulation results confirm that our searched codes have better error performances than the proposed scheme in 2000.

    Chapter 1 Introduction 1 1.1 Motivation and Background 1 1.2 Main Contribution 2 1.3 Thesis Organization 2 Chapter 2 Reviews of Unitary Space-Time Modulation 4 2.1 Communication System and Channel Model 4 2.2 Unitary Space-Time Modulation in [3] 6 2.2.1 Definition 6 2.2.2 Noncoherent Maximum-Likelihood Decoder 7 2.2.3 Code Construction of Unitary Space-Time Signal 7 2.2.4 Pairwise Error Probability 12 2.3 Unitary Space-Time Coded 8PSK 13 2.3.1 Search Codes 13 2.3.2 Results 14 Chapter 3 First Scheme 18 3.1 Introduction 18 3.2 Code Construction 19 3.3 Searched Codes 22 3.4 Simulation Results 25 3.5 Comparisons of Various Amplitude Patterns 40 3.6 The Worse Case for Proposed Scheme 1 42 3.7 Offset the Signal Points in the Outer Radius 43 Chapter 4 Second Scheme and Third Scheme 46 4.1 Scheme 2 46 4.1.1 Code Construction 46 4.1.2 Simulation Results 47 4.2 Scheme 3 48 4.2.1 Code Construction 48 4.2.2 Simulation Results 50 4.3 Compare Scheme 1 with Scheme 3 53 Chapter 5 Conclusions 55 Bibliography 56

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