Results 61 to 70 of about 6,450,359 (383)
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
doaj +1 more source
A Unified Asymptotic Analysis of Area Spectral Efficiency in Ultradense Cellular Networks [PDF]
IEEE Transactions on Information Theory, 2017 This paper studies the asymptotic properties of average area spectral efficiency (ASE) of a downlink cellular network in the limit of very dense base station (BS) and user densities.
Ahmad Alammouri, J. Andrews, F. Baccelli
semanticscholar +1 more source
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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Fundamental Limits of Low-Density Spreading NOMA with Fading
, 2018 Spectral efficiency of low-density spreading non-orthogonal multiple access channels in the presence of fading is derived for linear detection with independent decoding as well as optimum decoding.
Di Benedetto, Maria-Gabriella +3 more
core +1 more source
A New Look at Physical Layer Security, Caching, and Wireless Energy Harvesting for Heterogeneous Ultra-dense Networks [PDF]
, 2017 Heterogeneous ultra-dense networks enable ultra-high data rates and ultra-low latency through the use of dense sub-6 GHz and millimeter wave (mmWave) small cells with different antenna configurations.
Heath Jr, Robert W. +4 more
core +3 more sources
Energy- and Spectral-Efficiency Trade-Off for D2D-Multicasts in Underlay Cellular Networks [PDF]
IEEE Wireless Communications Letters, 2017 Underlay in-band device-to-device (D2D) multicast communication, where the same content is disseminated via direct links in a group, has the potential to improve the spectral and energy efficiencies of cellular networks.
Ajay Bhardwaj, S. Agnihotri
semanticscholar +1 more source
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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Dynamic base station repositioning to improve spectral efficiency of drone small cells [PDF]
IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks, 2017 With recent advancements in drone technology, researchers are now considering the possibility of deploying small cells served by base stations mounted on flying drones. A major advantage of such drone small cells is that the operators can quickly provide
Azade Fotouhi, Ming Ding, Mahbub Hassan
semanticscholar +1 more source
Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM
FEBS Letters, EarlyView.Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley +1 more source