This book comprehensively investigates an advanced chirp-based waveform— Affine Frequency Division Multiplexing (AFDM)—for next-generation wireless networks (NGWN) particular for high-mobility scenarios, such as vehicle-to-vehicle (V2V), unmanned aerial vehicles (UAV), and satellite networks. Adopting a holistic perspective, this book outlines the evolutionary road towards AFDM, demonstrates its mathematical fundamentals and theoretical performance limits in both wireless communications and sensing, and highlights its native flexibility, backward compatibility, security, and versatility. Moreover, this book discusses the main challenges of AFDM, including channel estimation, signal detection, multiple-input multiple-output (MIMO), multiple access, and integrated sensing and communications (ISAC), providing promising solutions to achieve a compelling trade-off between effectiveness and complexity. Looking ahead, this book explores several potential applications of AFDM and outlines key open research directions to guide its future development.

Prof. Yanqun Tang received his B.Sc., M.Sc., and Ph.D. degrees from the School of Electronic Science and Engineering, National University of Defense Technology, Changsha, China, in 2007, 2009, and 2013, respectively. He is currently an associate professor at the School of Electronics and Communication Engineering, Sun Yat-sen University, Shenzhen, China. He was a recipient of the IEEE PIMRC 2025 Best Paper Award and served as the technical program co-chair for the AFDM workshops in IEEE/CIC ICCC 2025. He served as a reviewer for many IEEE flagship journals and conferences. His research interests are affine frequency division multiplexing (AFDM), integrated sensing and communication (ISAC), full duplex communications, wireless physical-layer security, and machine learning techniques for wireless communications.

Dr. Haoran Yin received his B.Eng. and D.Eng. degrees from the School of Electronics and Communication Engineering, Sun Yat-Sen University, Shenzhen, China, in 2021 and 2026, respectively. He is currently a Research Fellow with the Harbin Institute of Technology (Shenzhen), Shenzhen, China. From July 2025 to March 2026, he was a visiting Ph.D. student at the Wireless Research Lab, New York University (NYU) Abu Dhabi, Abu Dhabi, United Arab Emirates. He was a recipient of the IEEE PIMRC 2025 Best Paper Award and was awarded the China National Scholarship for two consecutive years. He served as a reviewer for many IEEE flagship journals, including IEEE JSAC, IEEE TWC, IEEE TCOM, IEEE WCM, and IEEE COMMAG, and many IEEE flagship conferences. His research interests include advanced waveform design for Affine Frequency Division Multiplexing (AFDM), channel estimation, and integrated sensing and communications (ISAC) for next-generation wireless communication networks.

Dr. Yao Ge received the Ph.D. degree in Electronic Engineering from The Chinese University of Hong Kong (CUHK), Shatin, Hong Kong, in 2021, and the M.Eng. degree (research) in Communication and Information System and the B.Eng. degree in Electronics and Information Engineering from Northwestern Polytechnical University (NPU), Xi’an, China, in 2016 and 2013, respectively. He is currently a Research Fellow with the AUMOVIO-NTU Corporate Lab, Nanyang Technological University (NTU), Singapore. From October 2015 to March 2016, he was a Visiting Scholar with the Department of Electrical and Computer Systems Engineering, Monash University, Melbourne, VIC, Australia. From April 2016 to August 2016, he was a Visiting Scholar with the Department of Computer, Electrical and Mathematical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia. From May 2019 to December 2019, he was a Visiting Scholar with the Department of Electrical and Computer Engineering, University of California at Davis (UC Davis), Davis, CA, USA. His current research interests include wireless communications and system design, the Internet of Things, cognitive radio networks, automotive vehicle signal processing and communications, integrated sensing and communication, wireless network security, statistical signal processing, optimization, and game theory. He has been actively involved in organizing and chairing sessions and has served as a TPC member in numerous international conferences. He received the Best Paper Award from the International Conference on Wireless Communications and Signal Processing (WCSP) 2022 and the Best Poster Award of the Chinese Institute of Electronics Conference on Information Theory 2024. He is a Founding Member of the IEEE ComSoc Special Interest Group (SIG) on OTFS and has served as the Co-Chair for the IEEE/CIC ICCC 2022/2025 Workshop on OTFS and AFDM. He is also a Youth Editor of the Engineering, Journal of Information and Intelligence and a Regional Editor of the Computing & AI Connect.