Performance analysis of network mimo systems

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

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

TABLE OF CONTENTS

Page

LIST OF TABLES vii

LIST OF FIGURES viii

ABBREVIATIONS xi

CHAPTER 1: INTRODUCTION 1

1.1 Wireless Communication 1

1.2 MIMO Techniques 2

1.3 Network-MIMO systems 5

1.4 Thesis’s Structure 5

CHAPTER 2: BASIC MIMO THEORY 7

2.1 Wireless Background 7

2.2 MIMO Communications 8

2.2.1 MIMO systems Model 9

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

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

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