Framework for waveform analysis - Part II — Lesson 2

This lesson covers the concept of multi-dimensional signaling, which is crucial for waveforms in IMT-Advanced or the fourth generation system. It further explains the concept of orthogonal frequency division multiplexing (OFDM) and how it forms the foundation for the next set of discussions. For instance, the lesson uses the example of sending all signals simultaneously using OFDM, resulting in a significant improvement in data rate.

Video Highlights

00:18 - Introduction and recap of previous lesson
04:43 - Concept of orthogonal frequency spacing and the conditions for orthogonality
12:32 - Use of QAM kind of signaling and the conditions for orthogonality
20:58 - Orthogonal frequency division multiplexing (OFDM)
24:48 - N-dimensional signaling framework and its application

Key Takeaways

- The signal model and waveform strategies form the basis for the evolution of Air Interface towards 5G.
- The low pass equivalent and band pass format of signals are crucial in this evolution.
- Multi-dimensional signaling forms the basis for waveforms in IMT-Advanced or the fourth generation system.
- Orthogonal frequency division multiplexing (OFDM) allows for the simultaneous sending of multiple signals, leading to a significant improvement in data rate.