Delay-Doppler Communications

Chapter 1: Introduction

Abstract

The evolution of cellular wireless networks is presented in this chapter, followed by the fundamental motivation to design new waveforms for a high-mobility environment. The notions of waveform orthogonality, quasi-orthognality, and biorthogonality are discussed in relation to information multiplexing and interference caused by wireless channels.

Keywords

Introduction; Wireless communications; Modulation; OFDM; OTFS; Transmit basis; Receive basis

Chapter Outline

• 1.1  High-mobility wireless channels
• 1.2  Waveforms for high-mobility wireless channels
• 1.3  Bibliographical notes
• References

The concept of cellular wireless networks emerged in the 1980s with the first generation analog radio communications systems (1G). These ...