Results 41 to 50 of about 191,818 (262)
IEEE Access, 2022 In this paper, it is proposed to enhance coherent optical orthogonal frequency-division multiplexing (OFDM) system by using index modulation in terms of bit error rate (BER) and spectral efficiency for different levels of the fiber nonlinearity.
Ahmet Guner
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Information, 2018 In recent years, there has been a rapid evolution of wireless technologies that has led to the challenge of high demand for spectral resources. To overcome this challenge, good spectrum management is required that calls for more efficient use of the ...
Prince Semba Yawada, Mai Trung Dong
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Sensors, 2023 Full-duplex (FD) and reconfigurable intelligent surface (RIS) are potential technologies for achieving wireless communication effectively. Therefore, in theory, the RIS-aided FD system is supposed to enhance spectral efficiency significantly for the ...
Kunbei Pan +3 more
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SCMA Spectral and Energy Efficiency with QoS [PDF]
GLOBECOM 2020 - 2020 IEEE Global Communications Conference, 2020 GC
Samira Jaber +3 more
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An Enhanced DCO-OFDM Scheme for Dimming Control in Visible Light Communication Systems
IEEE Photonics Journal, 2016 In visible light communication (VLC) systems, optical orthogonal frequency-division multiplexing (O-OFDM) is an appealing modulation scheme. Recently, a number of O-OFDM schemes have been proposed. Among them, direct-current O-OFDM (DCO-OFDM) is a widely
Yang Yang +3 more
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Spectral Efficiency Improvement and Power Control Optimization of Massive MIMO Networks
IEEE Access, 2021 Higher requirements must be put forward about wireless signal transmission in harsh environments. Energy loss mitigation, channel estimation, noise interference reduction demands high quality of service in wireless communication.
Xiu Zhang, Hao Qi, Xin Zhang, Liang Han
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Spectral Efficient Spatial Modulation Techniques [PDF]
IEEE Access, 2019 Space modulation techniques (SMTs) have emerged as promising candidates for spectral- and energy-efficient wireless communication systems since they strike a good balance among error performance, power efficiency, spectrum efficiency, and receiver complexity.
Hany S. Hussein +4 more
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IEEE Access, 2023 This paper focuses on investigating uplink (UL) data transmission in cell-free massive MIMO based on orthogonal frequency division multiplexing (CF-mMIMO-OFDM) systems, taking into account the effects of hardware impairments (HWIs).
Asma Mabrouk, Rafik Zayani
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Reciprocal control of viral infection and phosphoinositide dynamics
FEBS Letters, EarlyView.Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley +1 more source
Физика волновых процессов и радиотехнические системы, 2020 This article is devoted to the study of the possibilities of increasing spectral efficiency in MIMO systems by using antennas with substrates of biisotropic and bianisotropic chiral metamaterials and various types of fractal emitters, in particular ...
Andrey N. Bespalov +3 more
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