Results 91 to 100 of about 109,670 (318)

Wireless Communications and Mobile Computing [PDF]

open access: yes
Presenting comprehensive coverage of this fast moving field, Wireless Communications and Mobile Computing provides the R&D communities working in academia and the telecommunications and networking industries with a forum for sharing research and ideas.
Enrico M. Vitucci
core  

Resource allocation for delay constrained wireless communications [PDF]

open access: yes, 2010
The ultimate goal of future generation wireless communications is to provide ubiquitous seamless connections between mobile terminals such as mobile phones and computers so that users can enjoy high-quality services at anytime anywhere without wires ...
Chen, J.
core  

Bending‐Resistant Intimate 3D Graphene–Metal Heterojunctions for Highly Sensitive and Robust Flexible Sensors

open access: yesAdvanced Science, EarlyView.
A reservoir‐guided silver‐nanoparticle soldering strategy is developed for bending‐resistant 3D graphene–metal heterojunctions. Controlled hot‐plate evaporation confines conductive ink within the metal reservoir, suppressing spreading and protecting the LIG interface from deformation‐induced fracture.
Saeyoung Park   +5 more
wiley   +1 more source

A new authentication protocol based on pointer forwarding for mobile communications [PDF]

open access: yes, 2010
[[abstract]]A frequently moving mobile user in GSM must re-register at the HLR frequently, and, therefore, the signaling traffic is overhead and HLR database update cost raised.
Cheng-Chi Lee; Min-Shiang Hwang; I-En Liao   +1 more
core  

Subarray-Cooperation-Based Multi-Resolution Codebook and Beam Alignment Design for mmWave Backhaul Links

open access: yesIEEE Access, 2019
The conflict between heavy training overhead and large beamforming gain is a bottleneck to deploy millimeter-wave (mmWave) communications for the next-generation wireless networks.
Renmin Zhang   +3 more
doaj   +1 more source

Tunable Dynamics via Dual‐Ion Modulation for Event‐based Data Processing Using a Highly Uniform and Self‐Rectifying Memristor Array

open access: yesAdvanced Science, EarlyView.
Tunable dynamics of an interface‐type memristor array enabled by dual‐ion modulation through Ag nanoclusters are demonstrated. A 32 × 32 one‐resistor (1R) array exhibits 100% yield with high temporal/spatial uniformity (<3%) and a rectification ratio of 105.
Yoonho Cho   +7 more
wiley   +1 more source

Performance Evaluation of Distributed-Antenna Communications Systems Using Beam-Hopping [PDF]

open access: yes, 2005
Digital beamforming (DBF) techniques are capable of improving the performance of communications systems significantly. However, if the transmitted signals are conflicted with strong interference, especially, in the direction of the transmitted beams ...
Yang, L.-L., Zhu, J., Hu, H.
core  

Incorporating Importance Sampling in EM Learning for Sequence Detection in SPAD Underwater OWC

open access: yesIEEE Access, 2019
In this paper, an importance sampling-based expectation-maximization (EMIS) algorithm is developed for sequence detection in single-photon avalanche diode underwater optical wireless communication (OWC) systems.
Nuo Huang   +3 more
doaj   +1 more source

Dipole‐Manipulated Built‐In Electric Field Enables Ultrafast Charge Separation in Perylene Diimide Polymers for Photoelectrochemical Water Splitting

open access: yesAdvanced Science, EarlyView.
Molecular dipole engineering in dendritic perylene diimide polymers through nitrogen‐rich heterocyclic linkers amplifies the built‐in electric field, enabling sub‐picosecond charge separation and efficient multi‐electron accumulation. This structure–dynamics–performance relationship establishes a versatile design strategy for high‐performance organic ...
Ying‐Xin Qiao   +11 more
wiley   +1 more source

Large System Performance and Distributed Scheme of Downlink Beamforming in F-RANs With Distributed Antennas

open access: yesIEEE Access, 2019
This paper addresses the performance of downlink beamforming in fog radio access networks (F-RANs) with distributed antennas. The wireless channel is modeled as Rician fading.
Pengcheng Zhu   +3 more
doaj   +1 more source

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