Wireless Communication Standards - Part II — Lesson 2

This lesson covers the evolution of the Air Interface towards 5G, starting from the development of wireless communication and GSM (2nd generation system) to the 3rd generation systems known as IMT-2000. It further discusses the transition towards the development of IMT-Advanced, LTE, and LTE-Advanced, and their comparison. The lesson also explains the technical aspects of these systems, including their bandwidth, chip rate, frame length, modulation, and channel coding. It highlights the improvements made in these systems, such as variable data rates, flexible modulation and code rate, error correction codes, and the use of multiple antennas. The lesson concludes with a discussion on the requirements and performance of IMT-Advanced or 4G systems and cell spectral efficiency.

Video Highlights

00:17 - Introduction
01:16 - Discussion on IMT-2000
03:52 - Technologies introduced in 3G++
09:48 - Explanation of 3G
12:13 - Comparison between WCDMA, IS-95 and GSM
21:02 - IMT - advanced
29:01 - Cell spectral efficiency for different test environments

Key Takeaways

- The transition from analog to digital communication was marked by the development of GSM, the 2nd generation system.
- The 3rd generation systems, also known as IMT-2000, introduced multiple technologies that met the specifications of IMT-2000.
- The development of IMT-Advanced, LTE, and LTE-Advanced brought significant improvements in terms of variable data rates, flexible modulation and code rate, error correction codes, and the use of multiple antennas.
- IMT-Advanced or 4G systems were designed to support all mobility conditions, a wide range of data rates, high-quality multimedia applications, and worldwide roaming.
- The performance of these systems is measured in terms of cell spectral efficiency, which is defined as bits per second per hertz per cell.