Results 31 to 40 of about 181,659 (263)
Joint Processing of Pilot and Data for Massive MIMO Systems in Ricean Fading Channels
IEEE Access, 2019 Besides the pilot symbols, the received data signals also contain some extra channel state information (CSI), which can be exploited to further improve the channel estimation accuracy.
Yuanxue Xin +5 more
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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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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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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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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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Organoids in pediatric cancer research
FEBS Letters, EarlyView.Organoid technology has revolutionized cancer research, yet its application in pediatric oncology remains limited. Recent advances have enabled the development of pediatric tumor organoids, offering new insights into disease biology, treatment response, and interactions with the tumor microenvironment.
Carla Ríos Arceo, Jarno Drost
wiley +1 more source
Connecting communities: Enhancing broadband access in rural Tanzania through small cell deployment
Journal of Engineering Research and ReviewsAim: The aim of this study is to explore potential performance enhancement to a network infrastructure comprising with Macro-cells only by introducing and deploying cost-effective and adaptable small-cell backhaul connections.
Pascal Yamakili +1 more
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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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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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