Results 71 to 80 of about 25,571,688 (374)
Robust and Secure Wireless Communications via Intelligent Reflecting Surfaces [PDF]
IEEE Journal on Selected Areas in Communications, 2019 In this paper, intelligent reflecting surfaces (IRSs) are employed to enhance the physical layer security in a challenging radio environment. In particular, a multi-antenna access point (AP) has to serve multiple single-antenna legitimate users, which do
Xianghao Yu +4 more
semanticscholar +1 more source
Advanced Functional Materials, EarlyView.The SERS spectra of reporter molecules adsorbed on chiral gold nanorods depends on the handedness of circularly polarized light (CPL‐SERS). The bisignate plasmonic CD spectra of chiral nanorods provides wavelength‐dependent CPL‐SERS. Selective discrimination of chiral nanorod handedness and different Raman reporters allow highly sensitive codification ...
Andrés Serrano‐Freijeiro +9 more
wiley +1 more source
EcoEnergyAll‐perovskite tandem solar cells are regarded as the next generation of devices capable of enhancing the solar energy utilization rate. Unlike single‐junction perovskite solar cells (PSCs), the efficacy of tandem cells is contingent upon the performance
Huan Bi +13 more
doaj +1 more source
IEEE Open Journal of Circuits and Systems, 2021 Cell-free massive MIMO (CF-mMIMO) provides wireless connectivity for a large number of user equipments (UEs) using access points (APs) distributed across a wide area with high spectral efficiency (SE).
Thomas Choi +7 more
doaj +1 more source
IEEE Access, 2020 The focus of wireless research is increasingly shifting toward 6G as 5G deployments get underway. At this juncture, it is essential to establish a vision of future communications to provide guidance for that research. In this paper, we attempt to paint a
H. Viswanathan, P. Mogensen
semanticscholar +1 more source
Magnetic‐Field Dependent VB− Spin Decoherence in Hexagonal Boron Nitrides: A First‐Principles Study
Advanced Functional Materials, EarlyView.This study investigates the decoherence of the VB− defect in h‐BN under external magnetic fields using first‐principles quantum many‐body simulations. A transition boundary distinguishing distinct decoherence regimes is identified, with its dependence on isotopic composition.
Jaewook Lee +3 more
wiley +1 more source
A Study on an Object oriented Modeling for the Satelite Control System Development reusing Structured Analysis and Design Approach [PDF]
Journal of Astronomy and Space Sciences, 1998 The object-oriented approach is a difficult method for engineers who are accustomed to other software development methods although it is an excellent software development approach.
Jaehoon Kim, Wonchan Jung, Sangbum Lee
doaj
An RSSI-Based Low-Power Vehicle-Approach Detection Technique to Alert a Pedestrian
Sensors, 2019 Information about an approaching vehicle is helpful for pedestrians to avoid traffic accidents while most of the past studies related to collision avoidance systems have focused on alerting drivers and controlling vehicles.
Yoshito Watanabe, Yozo Shoji
doaj +1 more source
Communication system uses modulated laser beam [PDF]
, 1965 Electro-optical system is placed on a satellite to effect communications between two remote stations.
Minott, P. O.
core +1 more source
, 2018 Heterogeneous cellular networks (HCNs) with millimeter wave (mmWave) communications included are emerging as a promising candidate for the fifth generation mobile network.
Ai, Bo +4 more
core +1 more source