結合發射分集多天線技術之TDD MC/DS-CDMA 架構性能研究

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姓名

廖漢淳(Han-chun Liao) 查詢紙本館藏

畢業系所

通訊工程學系

論文名稱

結合發射分集多天線技術之TDD MC/DS-CDMA 架構性能研究
(The Research of TDD MC/DS-CDMA Architecture Performance with MISO Antenna)

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摘要(中)

未來無線通訊系統，將朝向寬頻、高速資料傳送、高品質與多用戶同時傳輸的方向發展。所以本篇論文在於探討一個結合時域、頻域與空域等全方位的寬頻數位收發機系統。也就是說，本論文在分時雙工的系統中，利用寬頻多載波直接序列分碼多重進接通訊技術以及MISO天線技術，並且結合空-頻通道預先處理器(Pre-RAKE)，即可獲得發射的分集增益，而在接收機方面可利用Matched Filter，解相關偵測器(decorrelating Detector) ，最小平方差偵測器(MMSE Detector)來處理多用戶之間的干擾(MAI) ，進而檢測出高速與高品質的資料。其中，分集增益將有助於提昇接收訊號的訊雜比品質與效益，並且具有可彈性改變調變模式、用戶台省電等優點。
本論文系統架構更進而符合未來接收機“輕薄短小又省電”的設計需求。

摘要(英)

In the Future wireless communication system will develop to be broadband, higher transmit data rate, higher quality and multi-user. This thesis will discuss that omni-directional and broadband digital communication system that was combined time domain, frequency domain and space domain. We used Orthogonal Frequency Division Multiplexing (OFDM)-Code Division Multiple Access (CDMA) technology and Multiple-input single-output (MISO) and Pre-Rake technique to improve the performance. In the receiver, we used Matched Filter, Decorrelating Detector and Minimal Mean Square Error to process the problem of Multiple access interference (MAI). The system can have more higher transmit data rate and quality data information, the transmitter diversity can make up to improve signal to noise ratio, easily change modulation model and lower power for mobile station.
However, We proposed system architecture can be small, light and lower power for future mobile station.

關鍵字(中)

★ 分碼多工
★ 多天線
★ 分時多工

關鍵字(英)

★ MC-CDMA
★ DS-CDMA
★ MISO
★ TDD
★ MC/DS-CDMA
★ MT-CDMA

論文目次

中文摘要 I
ABSTRACT II
誌謝 III
CONTENTLIST OF FIGURE IV
LIST OF FIGURE V
LIST OF TABLE VII
CHAPTER 1 INTRODUCTION 1
1.1 MOTIVATION AND OBJECTIVE 1
1.2 STRUCTURE OF THESIS 2
CHAPTER 2 BASIC PRINCIPLES OF COMMUNICATION 3
2.1 MOBILE RADIO CHANNELS 3
2.1.1 Introduction of Mobile Radio Channels 3
2.1.2 Rayleigh Fading 4
2.1.3 Ricean Fading 5
2.1.4 Summary 5
2.2 ARCHITECTURE OF ANTENNA 7
2.2.1 Introduction 7
2.2.2 Technology of MISO 8
2.3 MODULATION TECHNIQUE OF MC/DS-CDMA 9
2.3.1 Introduction of OFDM 9
2.3.2 Multicarrier Modulation 10
2.3.3 Orthogonal Frequency Division Multiplexing (OFDM) 11
2.3.4 Cyclic Prefix(CP) 13
2.3.5 Multi-Carrier Equivalent Implementation by Using IDFT 14
2.4 TDD CDMA OF PRE-RAKE MODEL 16
2.4.1 TDD Communication System 16
2.4.2 Pre-Rake Model 17
2.5 TECHNOLOGY OF COMBINED CDMA WITH OFDM 19
2.5.1 Introduction of OFDM-CDMA System 19
2.5.2 DS-CDMA 21
2.5.3 MC-CDMA 23
2.5.4 MC/DS-CDMA 25
2.5.5 MT-CDMA 27
2.5.6 Compare of System 29
CHAPTER 3 ARCHITECTURE OF TDD MC/DS-CDMA 31
3.1 ARCHITECTURE OF SYSTEM 31
3.2 SYSTEM MODEL 32
3.2.1 Pre–Rake Transmitter 32
3.2.2 Receiver 33
3.3 DETECTION OF TRADITIONAL DS-CDMA SYSTEM 35
3.3.1 Types of Linear Multi-User Detection (MUD) 38
CHAPTER 4 PERFORMANCE ANALYSIS 44
4.1 PERFORMANCE OF SOME BASIC SCHEME 44
4.1.1 Performance of Different Users 44
4.1.2 Performance of Guard-Time Length 48
4.2 SIGNAL–TO–NOISE RATIO ANALYSIS 50
4.3 SIGNAL–TO–INTERFERENCE RATIO ANALYSIS 57
4.4 NUMBER OF USERS ANALYSIS 60
4.5 DATA LENGTH ANALYSIS 62
4.6 BIT ERROR PROBABILITY ANALYSIS 65
CHAPTER 5 CONCLUSION 70
REFERENCE 72

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指導教授

蔡木金(Mu-king,Tsay)

審核日期

2007-7-13

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