This document provides an overview of 4G mobile communication systems, including a brief history of cellular networks and a comparison of key parameters between 3G and 4G technologies. It discusses the vision and motivation for 4G research, as well as technologies like OFDM that enable high-speed data transmission over 4G networks. Several applications that could benefit from 4G capabilities are also examined, along with both the advantages and limitations of the new standard.

1. TABLE OF CONTENTS
1. ABSTRACT 01
2. WELCOME TO THE 4G 02
2.1. INTRODUCTION 03
2.2. HISTORY 03
2.3. WHAT IS 4G? 05
2.4. VISION OF 4G 05
3. 4G MOBILE COMMUNICATION SYSTEMS 07
3.1. THE FOURTH GENERATION 08
3.2. MOTIVATION FOR 4G RESEARCH BEFORE 3G HAS NOT BEEN DEPLOYED? 09
3.3. COMPARING KEY PARAMETERS OF 4G WITH 3G 10
3.4. WHAT IS NEEDED TO BUILD 4G NETWORKS OF FUTURE? 12
3.5. WHY OFDM? 13
3.6. THE 4G TRANSCEIVER 13
4. 4G PROCESSING 15
4.1. RECEIVER SECTION 15
4.2. BASEBAND PROCESSING 16
4.3. TRANSMITTER SECTION 17
5. APPLICATIONS 18
5.1. MOBILE STREAMING CHALLENGES 18
5.2. HETEROGENEITY 18
5.3. STREAMING STANDARDIZATION 19
5.4. VIRTUAL NAVIGATION AND TELEGEOPROCESSING 21
5.5. TELEMEDICINE 21
5.6. CRISIS MANAGEMENT APPLICATION 22
6. ADVANTAGES OF 4G 23
7. LIMITATIONS 24
8. CONCLUSION 25
9. REFERENCE 26