Waveform in 4G (SCFDMA, SCFDE) - Part II — Lesson 9

This lesson covers details of OFDM, its structure, working principles, and the parameters that affect its performance. The lesson also discusses the environmental effects that influence the choice of parameters in 5G air interface. It further explains the link adaptation procedure in OFDM and how channel fluctuations are utilized. The lesson also touches on the concept of DFT spread OFDM and its benefits in uplink communication. For instance, a student learning about 5G technology would understand how the DFT spread OFDM reduces Peak to Average Power Ratio, leading to improved power budget and coverage.

Video Highlights

00:18 - Introduction and recap to previous lesson
11:15 - Channel quality indicator feedback unit
13:24 - References on OFDM
16:37 - Sub carrier spacing
22:12 - Problem description
27:55 - OFDM and SCFDMA structures

Key Takeaways

- Understanding the principles and structure of OFDM is crucial in grasping the evolution of Air Interface towards 5G.
- The choice of parameters in 5G air interface is influenced by environmental effects.
- Link adaptation procedure in OFDM utilizes channel fluctuations.
- DFT spread OFDM is beneficial in uplink communication as it reduces PAPR and improves power budget and coverage.
- The evolution of Air Interface towards 5G lays the foundation for the waveform structure or the physical layer signaling procedure for the 4th and 5th generation.