Delay-Doppler Communications,
Edition 1 Principles and Applications
By Yi Hong, Tharaj Thaj and Emanuele Viterbo

Publication Date: 09 Mar 2022

Orthogonal Frequency Division Multiplexing (OFDM) has been the waveform of choice for most wireless communications systems in the past 25 years. This book addresses the “what comes next?¿ question by presenting the recently proposed waveform known as Orthogonal Time-Frequency-Space (OTFS), which offers a better alternative for high-mobility environments.

The OTFS waveform is based on the idea that the mobile wireless channels can be effectively modelled in the delay-Doppler domain. This domain provides a sparse representation closely resembling the physical geometry of the wireless channel. The key physical parameters such as relative velocity and distance of the reflectors with respect to the receiver can be considered roughly invariant in the duration of a frame up to a few milliseconds. This enables the information symbols encoded in the delay-Doppler domain to experience a flat fading channel even when they are affected by multiple Doppler shifts present in high-mobility environments.

Delay-Doppler Communications: Principles and Applications covers the fundamental concepts and the underlying principles of delay-Doppler communications. Readers familiar with OFDM will be able to quickly understand the key differences in delay-Doppler domain waveforms that can overcome some of the challenges of high-mobility communications. For the broader readership with a basic knowledge of wireless communications principles, the book provides sufficient background to be self-contained. The book provides a general overview of future research directions and discusses a range of applications of delay-Doppler domain signal processing.

Key Features

  • This is the first book on delay-Doppler communications
  • It is written by three of the leading authorities in the field
  • It includes a wide range of applications

With this book, the reader will be able to:

  • Recognize the challenges of high-mobility channels affected by both multipath and multiple Doppler shifts in physical layer waveform design and performance
  • Understand the limitations of current multicarrier techniques such as OFDM in high-mobility channels
  • Recognize the mathematical and physical relations between the different domains for representing channels and waveforms: time-frequency, time-delay, delay-Doppler
  • Understand the operation of the key blocks of a delay-Doppler modulator and demodulator both analytically and by hands-on MATLAB examples
  • Master the special features and advantages of OTFS with regard to detection, channel estimation, MIMO, and multiuser MIMO
  • Realize the importance of delay-Doppler communications for current and future applications, e.g., 6G and beyond
About the author
By Yi Hong, Associate Professor, Department of Electrical and Computer Systems Engineering, Monash University, Melbourne, VIC, Australia; Tharaj Thaj, PhD Student, Department of Electrical and Computer Systems Engineering, Monash University, Melbourne, VIC, Australia and Emanuele Viterbo, Professor and Head of Department, Department of Electrical and Computer Systems Engineering, Monash University, Melbourne, VIC, Australia
Table of Contents
1. Introduction
2. High-mobility wireless channels
3. OFDM review and its limitations
4. Delay-Doppler modulation
5. Zak transform analysis for delay-Doppler communications
6. Detection methods
7. Channel estimation methods
8. MIMO and multiuser OTFS
9. Conclusions and future directions

A: Notation and acronyms
B: Some useful matrix properties
C: Some MATLAB code and examples

Please visit the book's companion site for additional materials (MATLAB package code):
(copy and paste the URL to your browser and search or reach it through the hyperlink available in the Resources box).
Book details
ISBN: 9780323850285
Page Count: 260
Retail Price : £95.95
978012814323; 9780123748799; 9780123748799
Instructor Resources
Wireless communications systems designers and R&D engineers, graduate students, and researchers in mobile and wireless communications.
E Ertugrul Basar
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