Results 51 to 60 of about 5,997,708 (388)

Linear Constellation Precoded OFDM With Interleaved Subcarrier Index Modulation

open access: yesIEEE Access, 2019
Orthogonal frequency-division multiplexing with index modulation (OFDM-IM) is an emerging and promising multicarrier transmission technique; however, frequency diversity achievement requires further investigation for the OFDM-IM.
Qingbo Wang   +3 more
doaj   +1 more source

Packet-Level Index Modulation for LoRaWAN

open access: yesIEEE Access, 2021
The long range wide area network (LoRaWAN) is one of the enabling technologies for low power wide area (LPWA) networks. In LoRaWAN, a node transmits its packet to a gateway (GW) in an autonomous and decentralized manner.
Koichi Adachi   +5 more
doaj   +1 more source

Refractive Index Modulation in Monolayer Molybdenum Diselenide.

open access: yesNano letters (Print), 2021
Two-dimensional transition metal dichalcogenides are promising candidates for ultrathin light modulators due to their highly tunable excitonic resonances at visible and near-infrared wavelengths. At cryogenic temperatures, large excitonic reflectivity in
Melissa Li   +3 more
semanticscholar   +1 more source

Vector OFDM With Index Modulation

open access: yesIEEE Access, 2017
The concept of index modulation (IM) has gained increased attention in recent years. As a member of the IM family, orthogonal frequency division multiplexing with index modulation (OFDM-IM), which is able to convey additional information bits using the ...
Yun Liu   +4 more
doaj   +1 more source

Fluid Antenna Empowered Index Modulation for RIS-Aided mmWave Transmissions

open access: yesIEEE Transactions on Wireless Communications
In this paper, we propose a fluid antenna (FA) enabled joint transmit and receive index modulation (FA-JTR-IM) transmission mechanism for reconfigurable intelligent surface (RIS)-assisted millimeter-wave (mmWave) communication systems. By integrating the
Jing Zhu   +5 more
semanticscholar   +1 more source

Multiwavelength operation of erbium-doped fiber lasers by periodic filtering and phase modulation [PDF]

open access: yes, 2009
This paper explains the principles behind multiwavelength operation of an erbium-doped fiber laser (EDFL) under the combined effect of cavity phase modulation and periodic wavelength filtering.
Mirza, M.A., Stewart, G.
core   +1 more source

Generalized Frequency Division Multiplexing With Flexible Index Modulation

open access: yesIEEE Access, 2017
After the vision and the overall objectives of future wireless networks for 2020 and beyond have been defined, standardization activities for fifth generation (5G) wireless networks have been started.
Ersin Ozturk   +2 more
doaj   +1 more source

Performance Analysis of Novel Index Modulation-Based Non-Orthogonal Multiple Access Systems over Nakagami-m Fading Channels with Imperfect CSI [PDF]

open access: yesRadioengineering, 2023
In this paper, a novel index modulation-based non-orthogonal multiple access (IM-NOMA) system is proposed and investigated for both perfect and imperfect channel state information (CSI) uncertainty over Nakagami-m fading channel.
H. M. Shwetha, S. Anuradha
doaj  

Circular Convolution Filter Bank Multicarrier (FBMC) System with Index Modulation [PDF]

open access: yes, 2017
Orthogonal frequency division multiplexing with index modulation (OFDM-IM), which uses the subcarrier indices as a source of information, has attracted considerable interest recently.
Yu, Tianhang   +4 more
core   +1 more source

Unified Power Allocation for Receive Spatial Modulation Based on Approximate Optimization

open access: yesIEEE Access, 2018
In this paper, a novel unified power allocation (PA) framework is proposed for receive (pre-coding aided) spatial modulation (RSM). We find that the PA matrix design can be formulated as a non-convex quadratically constrained quadratic program (QCQP ...
Ping Yang   +5 more
doaj   +1 more source

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