VIET NAM NATIONAL UNIVERSITY, HA NOI UNIVERSITY OF ENGINEERING AND TECHNOLOGY PERFORMANCE ANALYSIS OF NETWORK-MIMO SYSTEMS A THESIS SUBMITTED IN FULFILMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF EECTRICAL ENGINEERING DUC-TUYEN TA 2010 Supervisor: Dr Trinh Anh Vu i TABLE OF CONTENTS Page LIST OF TABLES vii LIST OF FIGURES viii ABBREVIATIONS xi CHAPTER 1: INTRODUCTION 1.1 Wireless Communication 1.2 MIMO Techniques 1.3 Network-MIMO systems 1.4 Thesis’s Structure CHAPTER 2: BASIC MIMO THEORY 2.1 Wireless Background 2.2 MIMO Communications 2.2.1 MIMO systems Model 2.2.2 Theoretical MIMO Capacity Gains 10 2.2.3 Types of MIMO 12 2.3 Multi-user Communications 12 2.3.1 Limitations of Single-User view 13 2.3.2 Multi-User MIMO (MU-MIMO) 14 2.4 Multi-cell Communications 18 2.4.1 Limitations of Single-Cell View 19 2.4.2 Multi-Cell MIMO 19 3.1 Background 21 3.1.1 Inter-cell Interference 21 3.2 Theory behind Network MIMO 27 3.3 Network-MIMO systems Model 28 v 3.3.1 Uplink 29 3.3.2 Downlink 30 CHAPTER 4: SIMULATION AND RESULTS 34 4.1 Simulation Model 34 4.2 Simulation Diagram 36 4.3 Simulation Results 39 CHAPTER 5: CONCLUSION 45 REFERENCES 46 vi ABSTRACT Network MIMO is a means of coordinating and processing the information gathered from multiple- input multiple- output (MIMO) communication systems to increase spectral efficiency, robustness, and data rates These properties make it a topic of great interest in the near future as the number of wireless users continues to grow and their individual demands on bandwidth climb Systems employing network MIMO capitalize on the fact that inter-cell interference, a major problem for dense wireless systems, is a superposition of signals With careful coordination between receivers (and transmitters), these super-positions can be decoupled and the information they contain can be utilized The goal of this thesis is to investigate the ability of network MIMO techniques to increase data rates in multi-user indoor wireless networks of various sizes with various channel schemes The simulation results also show that Network MIMO systems can be increase data rates and good through put than non- networked MIMO systems iii ... 1.3 Network- MIMO systems 1.4 Thesis’s Structure CHAPTER 2: BASIC MIMO THEORY 2.1 Wireless Background 2.2 MIMO Communications 2.2.1 MIMO systems. .. Theoretical MIMO Capacity Gains 10 2.2.3 Types of MIMO 12 2.3 Multi-user Communications 12 2.3.1 Limitations of Single-User view 13 2.3.2 Multi-User MIMO (MU -MIMO) ... Limitations of Single-Cell View 19 2.4.2 Multi-Cell MIMO 19 3.1 Background 21 3.1.1 Inter-cell Interference 21 3.2 Theory behind Network MIMO 27 3.3 Network- MIMO