Wireless relay networks

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Table of contents

1 General Introduction 
1.1 Wireless sensor networks :merits and challenges
1.2 Thesis objective
1.3 Thesis overview
1.4 Thesis contributions
1.5 Author’s publications
1.5.1 Journal papers
1.5.2 Conference papers
2 Wireless Sensor Networks, State-of-the-Art 
2.1 Overview of wireless sensor networks
2.2 Sensor nodes
2.2.1 Classification of sensor nodes
2.2.2 Sensor configuration
2.3 Energy consumption issues
2.3.1 Network lifetime
2.3.2 Energy consumption and protocol layers
2.4 Design challenges ofWSNs
2.4.1 Trade-off between communication and computation
2.4.2 Connectivity and coverage in hostile environments
2.5 Cooperative communication
2.5.1 Multipath fading
2.5.2 Cooperative diversity inWSNs
2.6 Wireless relay networks
2.6.1 Cooperation strategies
2.6.2 Distributed space-time coding
2.7 Chapter summary
3 Signal Transmission in aWRN Case Study 
3.1 Introduction
3.2 Assumptions and system model
3.2.1 Network structure and definitions
3.2.2 Power distribution over network nodes
3.3 Data transmission formulation
3.4 Node cooperation and DSTBC at the relays
3.4.1 Case of two relay nodes
3.4.2 Case of four relay nodes
3.5 Signal detection at the destination
3.5.1 MMSE detection under full CSI
3.5.2 MMSE detection under partial CSI
3.5.3 LLR calculation
3.5.4 ML signal detection
3.6 Channel estimation
3.6.1 LS channel estimation
3.6.2 LMMSE channel estimation
3.7 Performance study through numerical results
3.7.1 Simulation parameters
3.7.2 ML versusMMSE detection under full CSI
3.7.3 Performance comparison under perfect full or partial CSI
3.7.4 Gaussian versus enhanced Gaussian approximation under perfect partial CSI
3.7.5 LS versus LMMSE channel estimation
3.7.6 LS estimation for different numbers of pilot blocks
3.8 Chapter conclusion
4 EM-Based Semi-Blind Channel Estimation 
4.1 Introduction
4.2 Classical EM-based channel estimation
4.3 Improving the classical EM-based estimator
4.4 Performance comparison between CB-EMand UL-EMmethods
4.4.1 Simulation parameters
4.4.2 Case of R = 2
4.4.3 Case of R = 4
4.4.4 Estimation error variance
4.5 Chapter conclusion and discussions
5 Iterative Data Detection and Channel Estimation for Non-Orthogonal DSTBC at Relays 
5.1 Introduction
5.2 Reformulation of data transmission
5.3 Signal detection and channel estimation at the destination
5.3.1 First iteration
5.3.2 Succeeding iterations
5.3.2.1 Channel estimation
5.3.2.2 PIC detection for non-orthogonal DSTBC
5.4 EXIT chart analysis
5.5 Simulation results
5.5.1 BER performance
5.5.2 EXIT Chart performance
5.6 Chapter conclusion and discussions
6 Improved Detection for AFWRN with Imperfect Channel Estimation 
6.1 Introduction
8 TABLE OF CONTENTS
6.2 Data transmission formulation
6.3 Signal detection under perfect partial CSI
6.4 Signal detection under imperfect partial CSI
6.4.1 Mismatched signal detection
6.4.2 Improved signal detection
6.5 Numerical results
6.5.1 BER performance
6.5.2 Convergence analysis using EXIT charts
6.6 Chapter conclusion and discussions
7 Conclusions and Perspective 
7.1 Conclusions
7.2 Perspectives