Waveform in 5G - Part II — Lesson 11

This lesson introduces the concept of numerologies in 5G and how they can be used to describe the structure of an OFDM symbol. It explains the 38.211 symbols. It also explains why OFDM could be suitable for uplink direction transmission. It covers the definition of resource block and bandwidth part in 5G. It concludes with a discussion on the variable sub-carrier spacing in 5G and its implications on the OFDM symbol duration and the guard interval.

Video Highlights

00:18 - Introduction
01:51 - Explanation of 38.211 : symbols
04:11 - Frame structure and physical resources
11:45 - Definition of resource block and OFDM baseband signal generation
18:35 - Variable sub carrier bandwidth and CP length
24:54 - Numerology summary

Key Takeaways

- The air interface in both 4G and 5G primarily consists of OFDM with access.
- DFT spread OFDM is supported in the uplink direction in both 4G and 5G.
- The user data transmission in the uplink direction does not need to be sent over the entire stretch of bandwidth.
- The concept of numerologies in 5G allows for the description of the structure of an OFDM symbol through a single parameter, mu.
- The variable sub-carrier spacing in 5G allows for a variation in the OFDM symbol duration and the guard interval.