Frame Structure in 5G NR — Lesson 1

This lesson explains the concept of OFDM numerology, the frame structure, and the frame format present in 5G. The lesson also provides a detailed understanding of the expression for the OFDM symbol generation and the factors affecting it. For instance, it explains how the sub-carrier spacing and time are crucial factors in this context.

Video Highlights

00:17 - Introduction
03:29 - Overview of OFDM numerology
05:46 - Concept of frame structure
09:08 - Concept of slot
14:07 - Rearranging sequence of view
16:40 - Resource grid and resource block
29:27 - 5G NR frame structure

Key Takeaways

- The waveform used for the fourth and fifth generations is primarily the same, but it is parameterized in the fifth generation and called OFDM numerology.
- The frame structure and format in 5G have evolved for specific reasons, including the need for flexibility and the ability to accommodate multiple services.
- The OFDM symbol generation involves the symbol constellation in the case of OFDM, and the combination of the DFT spread signal.
- The concept of numerology in 5G allows for variable sub-carrier spacing or bandwidth along with variable guard interval or cyclic prefix.
- The flexibility of frame structures in 5G allows for the accommodation of multiple services, such as Ultra Reliable Low Latency Communication (URLLC).