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Index Modulation Techniques for Next-Generation Wireless Networks Ertugrul Basar, Miaowen Wen, Raed Mesleh, Marco Di Renzo, Yue Xiao, Harald Haas

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Index Modulation Techniques for Next-Generation Wireless Networks Ertugrul Basar, Miaowen Wen, Raed Mesleh, Marco Di Renzo, Yue Xiao, Harald Haas IEEE Access Special Section Editorial: Index Modulation Techniques for Next-Generation Wireless Networks Ertugrul Basar, Miaowen Wen, Raed Mesleh, Marco Di Renzo, Yue Xiao, Harald Haas To cite this version: Ertugrul Basar, Miaowen Wen, Raed Mesleh, Marco Di Renzo, Yue Xiao, et al.. IEEE Access Spe- cial Section Editorial: Index Modulation Techniques for Next-Generation Wireless Networks. IEEE Access, IEEE, 2018, 6, pp.26452 - 26456. 10.1109/ACCESS.2018.2833265. hal-02376143 HAL Id: hal-02376143 https://hal-centralesupelec.archives-ouvertes.fr/hal-02376143 Submitted on 22 Nov 2019 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Date of current version June 5, 2018. Digital Object Identifier 10.1109/ACCESS.2018.2833265 EDITORIAL IEEE ACCESS SPECIAL SECTION EDITORIAL: INDEX MODULATION TECHNIQUES FOR NEXT-GENERATION WIRELESS NETWORKS I. INTRODUCTION The 23 articles published in this Special Section can Index modulation (IM) techniques appear as competitive can- be categorized under four major groups. We have received didates for next-generation (5G and beyond) wireless net- i) 3 tutorial type articles (one of them has been submitted works due to the attractive advantages they offer in terms of by our Guest Editorial Team itself upon the invitation of spectral and energy efficiency as well as hardware simplicity. the Editor-in-Chief of IEEE ACCESS), ii) 10 articles cov- IM is a highly spectrum- and energy-efficient yet simple ering the most recent advances in the field of orthogo- digital modulation technique, which utilizes the indices of nal frequency division multiplexing with index modulation the building blocks of the corresponding communication (OFDM-IM), iii) 6 articles on the recent developments in the systems to convey additional information bits. IM systems field of spatial modulation (SM) techniques, and iv) 4 arti- provide alternative ways to transmit information in contrast cles in other relevant areas in which IM technologies were to traditional digital modulation schemes that rely on the applied. modulation of the amplitude/phase/frequency of a sinusoidal In the opening article of this Special Section (Index Modu- carrier signal for transmission, as widely considered in the lation Techniques for Next-Generation Wireless Networks), field of communications over the past 50 years. Radically, which carries the same title as our Special Section, we, IM schemes have the ability to map information bits by the Guest Editors, have provided a comprehensive overview altering the on/off status of their transmission entities such of the most recent developments in the field of IM technolo- as transmit antennas, subcarriers, radio frequency (RF) mir- gies and focused on the three popular forms of IM: SM, chan- rors, transmit light emitting diodes, relays, modulation types, nel modulation (media based modulation) and OFDM that time slots, precoder matrices, dispersion matrices, spreading consider the transmit antennas of a multiple-input multiple- codes, signal powers, loads and so on. In other words, IM output (MIMO) system, the RF mirrors (parasitic elements) creates completely new dimensions for data transmission. mounted at a transmit antenna, and the subcarriers of an Since the initial skepticism of both academia and industry OFDM system for IM techniques, respectively. We strongly on the potential and applicability of IM technologies has believe that this 54-page masterpiece will be a classic ref- now gone away, we strongly believe that IM is not another erence for the researchers working in this frontier for many simple digital modulation alternative, but rather can be a years to come. In the tutorial article of Sugiura et al. (State- game-changing communication paradigm whose time has of-the-Art Design of Index Modulation in the Space, Time, come! and Frequency Domains: Benefits and Fundamental Limita- There has been a tremendous interest in IM schemes over tions), the authors presented a comprehensive review of IM the past few years. Therefore, we decided to organize this architectures that operate in the space, time, and frequency IEEE ACCESS Special Section, which has been the first in the domains and clarified the advantages of IM-based systems literature in this frontier, at the end of 2016. The aim of this over the conventional schemes in wireless standards, such IEEE ACCESS Special Section has been to provide a forum as spatial multiplexing, OFDM, and single-carrier frequency for the latest research and advances in the field of emerging division multiple access. Our Special Section closes with IM techniques. With this purpose, we have accepted 23 high- the tutorial article of Hemadeh et al. (Hierarchical Multi- quality articles from leading research groups worldwide dur- Functional Layered Spatial Modulation), which presents the ing the period of June 2017-January 2018. novel multi-functional architecture of layered multi-set mod- IEEE ACCESS's multidisciplinary, application-oriented, ulation. In this study, a generalized framework that subsumes and all-electronic concept has provided a great opportunity various MIMO techniques exhibiting different multiplex- for the dissemination of the most recent and interesting results ing and diversity functionalities, has been proposed by the in the field of IM technologies. Because of its open access authors. nature, this Special Section is freely accessible to all readers Our Special Section has attracted the attention of the around the world. researchers working on OFDM-IM, which is a promising 2169-3536 2018 IEEE. Translations and content mining are permitted for academic research only. 26452 Personal use is also permitted, but republication/redistribution requires IEEE permission. VOLUME 6, 2018 See http://www.ieee.org/publications_standards/publications/rights/index.html for more information. SPECIAL SECTION ON INDEX MODULATION TECHNIQUES FOR NEXT-GENERATION WIRELESS NETWORKS alternative to the classical OFDM, and we have accepted improve the error performance of the plain coordinate inter- 10 articles in this frontier. Considering the adoption of OFDM leaved OFDM-IM scheme through an additional diversity for both uplink and downlink of the 5G New Radio in 2017, gain. research studies in the field of OFDM-IM have gained a Our Special Section also published 6 articles on the most remarkable momentum in the past year. Li et al. (Information recent SM technologies. Cheng et al. (On Simultaneous Guided Precoding for OFDM) proposed a novel information Wireless Information and Power Transfer for Receive Spa- guided precoding technique, called precoding aided OFDM- tial Modulation) studied the performance of receive spatial IM, to improve the spectral efficiency of OFDM-IM. Hu et al. modulation combined with simultaneous wireless informa- (Low-Complexity Subcarrier-Wise Detection for MIMO- tion and power transfer. Rajashekar et al. (Transmit Antenna OFDM with Index Modulation) considered MIMO imple- Subset Selection in Spatial Modulation Relying on a Realistic mentation of OFDM-IM and developed an optimal detection Error-Infested Feedback Channel) shed light on the perfor- algorithm with reduced complexity for MIMO-OFDM-IM mance of SM employing Euclidean distance-based antenna along with a low-complexity near-optimal detector based selection in the presence of a realistic error-infested feedback on sequential Monte Carlo technique. Mao et al. (Zero- channel. Hai et al. (Complex Hadamard Matrix-Aided Gener- Padded Orthogonal Frequency Division Multiplexing with alized Space Shift Keying Modulation) presented a complex Index Modulation Using Multiple Constellation Alphabets) Hadamard matrix-aided generalized space shift keying mod- proposed the scheme of zero-padded tri-mode OFDM-IM to ulation scheme by introducing complex-Hadamard-based achieve higher spectral and energy efficiency. In this scheme, signal vectors at the transmitter to improve the spectrum only a fraction of the available subcarriers is modulated by efficiency of generalized space shift keying. Zheng (Hybrid two distinguishable constellation alphabets, while the other Spatial Modulation Aided Distributed Relays: Thresh- subcarriers remain empty to reduce the energy consump- old Detection and Constellation Rotation) studied hybrid tion. Inspired by the advantages of vector OFDM, Liu et al. SM-aided virtual MIMO one-way and two-way relaying (Vector OFDM with Index Modulation) introduced an architectures with multiple distributed single-antenna relay enhanced OFDM-IM scheme termed vector OFDM with IM nodes and proposed a two-stage relay detector for one-way not only to improve the BER performance of OFDM-IM but relaying. Hiari et al. (A Reconfigurable SDR Transmitter also to reduce the PAPR of the transmit signals. Zhang et al. Platform Architecture for Space Modulation MIMO Tech- (Dual-Mode Index Modulation Aided OFDM with Constella- niques) proposed a single software defined radio platform tion Power Allocation and Low-Complexity Detector Design) architecture that implements different space modulation tech- proposed a new dual-mode IM-aided
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