Index Modulation for OFDM Communications Systems

Thanks to their considerable advantages, index modulation and orthogonal frequency division multiplexing (OFDM) are considered to be promising candidates for future wireless communications. This book focuses on the index modulation techniques for OFDM communications systems, which allow information to be conveyed not only via constellation symbols, but also by the indices of various transmission entities in OFDM systems, such as signal constellations, spreading codes, and pilots.

The book discusses representative transmitter and receiver designs, optimization and performance analysis of index modulation based on various transmission entities. It first introduces readers to constellation-based index modulation via a combinatorial approach, including the classical index modulation scheme and two embodiments of information-guided precoding for OFDM systems. It further discusses constellation-based index modulation via a permutational approach, including the basic, generalized, and diversity-enhancing forms. It then describes how the spreading code is used to design an index modulated spread spectrum for OFDM systems, and the extensions to multi-code and multi-user scenarios. In addition it explores information guided pilot insertion for OFDM systems, followed by applications to carrier phase tracking and channel estimation. Lastly, the book highlights a number of open problems and discusses future research directions in the general field of index modulation.

Intended for professionals and researchers in the field of wireless communications, this book is also a valuable resource for advanced-level electrical engineering and computer science students.

• Index modulation
• orthogonal frequency division multiplexing (OFDM)
• constellation
• spread spectrum
• pilot insertion
• performance analysis

• School of Electronic & Information Engg, South China University of Technology, Guangzhou, China

  Miaowen Wen

• College of Information Science and Technology, Jinan University, Guangzhou, China

  Qiang Li

• School of Electronics Engineering and Computer Science, Peking University, Beijing, China

  Xiang Cheng

Miaowen Wen received his Ph.D. degree from Peking University, Beijing, in 2014. From 2012 to 2013, he was a Visiting Student Research Collaborator with Princeton University, NJ, USA. He is currently an Associate Professor at the South China University of Technology, Guangzhou, China. He has published one book and more than 100 IEEE journal papers. His research interests include a variety of topics in the areas of wireless and molecular communications.

Qiang Li received his Ph.D. degree from South China University of Technology, Guangzhou, in 2020. From 2018 to 2019, he was a Visiting Student Research Collaborator with Princeton University, NJ, USA. He is currently a faculty member at the Jinan University, Guangzhou, China. His research interests include index modulation and reconfigurable intelligent surfaces.

Xiang Cheng received his Ph.D. degree from Heriot-Watt University and The University of Edinburgh, U.K., in 2009, where hewas awarded the Postgraduate Research Thesis Prize. He is currently a Professor at Peking University. His general research interests are in areas of channel modeling, wireless communications and data analytics, subjects on which he has published more than 200 journal and conference papers, five books, and holds 10 patents.

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