Cooperative Diversity System for High Data Throughput over Multiple Relay Network
- 주제(키워드) cooperative diversity
- 발행기관 고려대학교 대학원
- 지도교수 고영채
- 발행년도 2010
- 학위수여년월 2010. 2
- 학위구분 박사
- 학과 일반대학원 전자컴퓨터공학과
- 세부전공 통신및네트워크 전공
- 원문페이지 129 p
- 실제URI http://www.dcollection.net/handler/korea/000000021091
- 본문언어 영어
- 제출원본 000045590032
초록/요약
To improve the system reliability of the wireless transmission by offered diversity gain over multiple relay network, this dissertation studies the cooperative diversity system that relies on the help of additional relay nodes, and addresses energy-efficient systems for the high data throughput and the low complexity. First of all, we present the low complexity relay selection algorithms which choose an adequate one among the multiple relay candidates by a certain threshold, and consider both the decodeand-forward (DF) and the amplify-and-forward (AF) protocols. In addition, we focus on their statistic analysis on the signal-to-noise ratio (SNR), and investigate the system performances such as the system throughput, average bit error rate (BER), outage probability, etc. Secondly, we consider the efficient and adaptive relaying protocol to prevent a loss in spectral efficiency by half-duplex transmission and to enhance the spatial diversity gain by the best relay selection, and provide its performance analysis in terms of average spectral efficiency, average BER and outage probability based on adaptive modulation. Another way to increase the spectral efficiency in half-duplex transmission, two-way AF relaying scheme is studied in this dissertation and its system throughput analysis on Shannon capacity and the practical rate by adaptive modulation is derived over multiple relay network.
more목차
Chapter 1 Introduction 1
1.1 Motivation and Objective 1
1.2 Low Complexity Cooperative Systems 2
1.2.1 Performance Analysis of Switch and Examine Relay Selection for Efficient Relaying over Multiple Relay Network 3
1.2.2 Low Complexity Cooperative Communication with Switched Relay Selection and Adaptive Modulation 3
1.3 Spectral-efficient Cooperative Systems 4
1.3.1 Performance Analysis of Incremental Opportunistic Relaying over Identically and non-Identically Distributed Cooperative Paths 4
1.3.2 Performance Bounds for Two-way Amplify-and-Forward Relaying Based on Relay Path Selection 5
1.3.3 Performance Analysis of Two-Way Amplify and Forward Relaying with Adaptive Modulation over Multiple Relay Network 5
1.4 System Model 7
Chapter 2 Performance Analysis of Switch and Examine Relay Selection for Efficient Relaying over Multiple Relay Network 8
2.1 Introduction 8
2.2 System and Channel Models 10
2.2.1 System Model 10
2.2.2 Channel Model 12
2.3 Mode of Operation of Proposed Algorithm 13
2.4 Statistics Analysis 15
2.4.1 CDF and PDF 15
2.4.2 MGF 18
2.5 End-to-End Performance Analysis 18
2.5.1 Average Output SNR 18
2.5.2 Outage Probability 19
2.5.3 Average Bit / Symbol Error Rate 20
2.6 Performance Analysis of Selection Decode-and-Forward 22
2.6.1 Outage Probability 22
2.6.2 Average Bit / Symbol Error Rate 23
2.7 Complexity Comparisons 23
2.7.1 Number of Active Relay Nodes 24
2.7.2 Number of Channel Estimations 24
2.8 Numerical Examples 26
2.9 Appendix 2-1 : Statistics of Combined SNR at the Destination 31
Chapter 3 Low Complexity Cooperative Communication with Switched Relay Selection and Adaptive Modulation 34
3.1 Introduction 34
3.2 System Overview 35
3.2.1 System Model 35
3.2.2 Adaptive Modulation 36
3.3 Mode of Operation 37
3.3.1 Maximum Spectral Efficiency Scheme 38
3.3.2 Minimum Relay Probing Scheme 38
3.4 Statistics of Combined Output SNR 39
3.4.1 Maximum Spectral Efficiency Scheme 39
3.4.2 Minimum Relay Probing Scheme 41
3.5 Performance Analysis 43
3.5.1 Average Spectral Efficiency 43
3.5.2 Outage Probability 44
3.6 System Complexity 44
3.6.1 Maximum Spectral Efficiency Scheme 45
3.6.2 Minimum Relay Probing Scheme 45
3.7 Numerical Results 45
3.8 Appendix 3-1 : Statistics Analysis of $Gamma_i$ 48
Chapter 4 Performance Analysis of Incremental Opportunistic Relaying over Identically and non-Identically Distributed Cooperative Paths 51
4.1 Introduction 51
4.2 System Description 53
4.2.1 System Model 53
4.2.2 Channel Model 56
4.2.3 Incremental Relaying and Opportunistic Relaying 56
4.2.4 Adaptive Modulation 57
4.3 Proposed IOR-AM Scheme 58
4.3.1 Mode of Operation 58
4.3.2 Cutoff Threshold 60
4.3.3 Average Number of Times of Relay Activation 60
4.4 Performance Analysis 61
4.4.1 Average Spectral Efficiency 61
4.4.2 Average Bit Error Rate 62
4.4.3 Outage Probability 63
4.5 Numerical Examples 64
4.6 Appendix 4-1 : Joint Statistics of the Combined Output SNR at the Destination 67
4.6.1 I.I.D. Pathes over Hops 69
4.6.2 I.nI.D. Pathes over Hops 70
4.7 Appendix 4-2 : Statistics of the Combined Output SNR at the Destination 70
4.7.1 I.I.D. Pathes over Hops 71
4.7.2 I.nI.D. Pathes over Hops 73
Chapter 5 Performance Bounds for Two-way Amplify-and-Forward Relaying Based on Relay Path Selection 75
5.1 Introduction 75
5.2 System Description 76
5.2.1 System Model 78
5.2.2 Two-Way Relaying with Opportunistic Selection 78
5.3 Performance Bounds for Average Sum-Rate of TWR-OS 80
5.4 Numerical Examples 83
Chapter 6 Performance Analysis of Two-Way Amplify and Forward Relaying with Adaptive Modulation over Multiple Relay Network 87
6.1 Introduction 87
6.2 System Description 89
6.2.1 System Model 90
6.2.2 Signal-to-Noise Ratio 91
6.2.3 Adaptive Modulation 92
6.3 TWR-AM with Relay Selection 93
6.3.1 System Description 93
6.3.2 Selection Criterion 94
6.3.3 Signal-to-Noise Ratio 95
6.4 Performance Analysis 95
6.4.1 Average Spectral Efficiency 96
6.4.2 Average Bit Error Rate 97
6.5 Two-Way Relaying with Direct Path 98
6.5.1 Statistical Analysis 99
6.5.2 Average Spectral Efficiency and Average Bit Error Rate 100
6.6 Numerical Examples 100
6.7 Appendix 6-1 : Statistic of the SNR for dual-hop AF relaying 105
Chapter 7 Conclusion 109
