ABSTRACT
• The approaching 4G (fourth generation) mobile communication systems are projected to solve still-remaining problems of 3G (third generation) systems and to provide a wide variety of new services, from high-quality voice to high-definition video to high-data-rate wireless channels.
4G DEFINITION
• Fourth Generation Cellular Communication (4G) is not one defined technology or standard, but rather a collection of technologies and protocols aimed at creating fully packet-switched networks optimized for data.
• 4G networks are projected to provide speeds of 100 Mbps while moving and 1 Gbps while stationary.
Why 4G?
• Limitation to meet expectations of applications like multimedia, full motion video, wireless teleconferencing
• Wider Bandwidth
• Difficult to move and interoperate due to different standards hampering global mobility and service portability
• Primarily Cellular (WAN) with distinct LANs’; need a new integrated network
• Limitations in applying recent advances in spectrally more efficient modulation schemes
• Need all all digital network to fully utilize IP and converged video and data.
3 Major Components to 4G
– Modulation/Demodulation
– Multiple-Input Multiple-Out (MIMO)
– Channel Decoder/Encoders
3G vs. 4G
• Less Complexity, Faster Transmission
• Unlike the 3G networks which are a combination of circuit switched and packet switched networks, 4G will be based on packet switching only. This will allow low-latency data transmission.
Conclusion
• As the history of mobile communications shows, attempts have been made to reduce a number of technologies to a single global standard. Projected 4G systems offer this promise of a standard that can be embraced worldwide through its key concept of integration.
