Results 21 to 30 of about 5,997,708 (388)
Super-Mode OFDM With Index Modulation [PDF]
IEEE Transactions on Wireless Communications, 2020 Orthogonal frequency division multiplexing (OFDM) with index modulation (OFDM-IM) appears as a promising multi-carrier waveform candidate for beyond 5G due to its attractive advantages such as operational flexibility and ease of implementation. However, OFDM-IM may not be a proper choice for 5G services such as enhanced mobile broadband (eMBB) since ...
Ali Tugberk Dogukan, Ertugrul Basar
openaire +5 more sources
Polar-Coded OFDM With Index Modulation
IEEE Access, 2021 In this paper, we apply polar codes to a modified version of OFDM systems with index modulation which is called OFDM with in-phase/quadrature index modulation (OFDM-I/Q-IM).
Si-Yu Zhang, Behnam Shahrrava
doaj +1 more source
DCT-OFDM With Index Modulation [PDF]
IEEE Communications Letters, 2017 In this letter, index modulation (IM) is proposed for OFDM systems based on a discrete cosine transform (DCT) implementation. The new DCT-OFDM-IM scheme is shown to yield spectral efficiency improvements of up to 38% relative to OFDM-IM and up to 55% relative to OFDM while occupying the same bandwidth and maintaining similar robustness against the ...
Chafii, Marwa +2 more
openaire +3 more sources
Design and Analysis of a New Index-Modulation-Aided DCSK System With Frequency-and-Time Resources
IEEE Transactions on Vehicular Technology, 2023 We propose a new index-modulation-aided differential chaos shift keying (DCSK) system using frequency-and-time resources, referred to as CTIM-DCSK system, to achieve high-data-rate transmissions. In the proposed system, the orthogonal sinusoidal carriers
Yi Fang +4 more
semanticscholar +1 more source
Filter Shape Index Modulation [PDF]
ICC 2021 - IEEE International Conference on Communications, 2021 Index Modulation (IM) techniques enable a significant Spectral Energy (SE) and/or Energy Efficiency (EE) enhancement. In this paper, a novel Filter IM domain is being explored, where a novel scheme Filter Shape Index Modulation (FSIM) is proposed. In contrast to most existing Single-Input Single-Output (SISO) IM systems, the proposed scheme achieves a ...
Saad, Majed +4 more
openaire +2 more sources
Reconfigurable Intelligent Surface-Based Index Modulation: A New Beyond MIMO Paradigm for 6G [PDF]
IEEE Transactions on Communications, 2019 Transmission through reconfigurable intelligent surfaces (RISs), which control the reflection/scattering characteristics of incident waves in a deliberate manner to enhance the signal quality at the receiver, appears as a promising candidate for future ...
E. Başar
semanticscholar +1 more source
Surface acoustic waves for acousto-optic modulation in buried silicon nitride waveguides [PDF]
, 2019 We theoretically investigate the use of Rayleigh surface acoustic waves (SAWs) for refractive index modulation in optical waveguides consisting of amorphous dielectrics.
Boller, Klaus-J. +2 more
core +7 more sources
Cluster Index Modulation for mmWave Communication Systems
Frontiers in Communications and Networks, 2022 In this study, a novel cluster index modulation (CIM) scheme, which is based on indexing the available clusters in the environment, is proposed for future mmWave communication systems.
Mahmoud Raeisi +3 more
doaj +1 more source
Index Modulation for STAR-RIS Assisted NOMA System
IEEE Communications Letters, 2023 In this letter, we first incorporate the concept of index modulation (IM) into simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) aided non-orthogonal multiple access (NOMA) system to improve the spectral efficiency.
Jing Zhu +4 more
semanticscholar +1 more source
A Semidefinite Relaxation Approach to OFDM-IM Detection in Rapidly Time-Varying Channels
IEEE Access, 2018 In this paper, the signal detection of orthogonal frequency division multiplexing with index modulation (OFDM-IM) in the rapidly time-varying channel is studied.
Jianping Zheng, Hongmei Lv
doaj +1 more source