Miaowen Wen - Index Modulation for OFDM Communications Systems (Wireless Networks)

The purpose of Springers Wireless Networks book series is to establish the state of the art and set the course for future research and development in wireless communication networks. The scope of this series includes not only all aspects of wireless networks (including cellular networks, WiFi, sensor networks, and vehicular networks), but related areas such as cloud computing and big data. The series serves as a central source of references for wireless networks research and development. It aims to publish thorough and cohesive overviews on specific topics in wireless networks, as well as works that are larger in scope than survey articles and that contain more detailed background information. The series also provides coverage of advanced and timely topics worthy of monographs, contributed volumes, textbooks and handbooks.

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The unprecedented surge of mobile data traffic requires future wireless networks to support both high spectral efficiency and energy efficiency. The currently employed orthogonal frequency division multiplexing (OFDM) technique, unfortunately, is not capable of satisfying such requirements. The OFDM modulation is prone to Doppler-induced intercarrier interference. Its inherent high peak-to-average power ratio also necessitates expensive power amplifiers. In this context, novel advanced modulation techniques are therefore very much needed. Among these, the recently emerging index modulation has attracted significant interest. Index modulation refers to a family of modulation techniques that leverage upon the onoff state of the transmission entities such as antenna, signal constellation, spreading code, and pilot to convey information. A prominent feature of index modulation is that the additional information is implicitly transmitted over the emitted signal at the cost of little or even no power, achieving significant benefits in terms of spectral efficiency and energy efficiency. The recent standardization that OFDM is deemed as both uplink and downlink waveforms of the fifth-generation wireless networks sets off a new wave of development of index modulation techniques for OFDM communications systems.

This monograph includes transceiver design, system optimization, and performance analysis of index modulation techniques based on constellation, code, and pilot resources for OFDM communications systems. The chapters of this monograph are relatively independent of each other. The readers can go directly to the chapter(s) of interest. In Chap. , some open problems and discussions about the future research directions are highlighted.

This monograph is designed for researchers in the field of wireless communications.

We would like to thank Mr. Wensong Zhang, Mr. Yuekai Zhang, Mr. Meng Zhang, Dr. Jun Li, Dr. Ertugrul Basar, and Dr. Beixiong Zheng for their much help in the research. Finally, we would like to thank the continued support from the National Natural Science Foundation of China under grant 61871190, and the Natural Science Foundation of Guangdong province under grant 2018B030306005. Ministry National Key Research and Development Project under Grant 2017YFE0121400: 20192020 and the Open Research Fund from Shenzhen Research Institute of Big Data under Grant No. 2019ORF01006.