Results 61 to 70 of about 68,865 (333)
Sectoring in Multi-cell Massive MIMO Systems
, 2017 In this paper, the downlink of a typical massive MIMO system is studied when each base station is composed of three antenna arrays with directional antenna elements serving 120 degrees of the two-dimensional space.
Ashikhmin, Alexei +3 more
core +1 more source
On Eavesdropping Attacks in Wireless Sensor Networks with Directional Antennas
International Journal of Distributed Sensor Networks, 2013 The eavesdropping attack is a serious security threat to a wireless sensor network (WSN) since the eavesdropping attack is a prerequisite for other attacks.
Hong-Ning Dai +3 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Cu‐based catalysts as a cornerstone in advancing sustainable energy technologies are fully reviewed in this manuscript, highlighting their potential in photo‐ and electrocatalysis. It includes metallic copper, copper oxides, copper sulfides, copper halide perovskites, copper‐based metal–organic frameworks (MOFs), and covalent organic frameworks (COFs),
Jéssica C. de Almeida +16 more
wiley +1 more source
Directional GPS antenna for indoor positioning applications [PDF]
, 2009 In this paper, a directional GPS antenna for L1 frequency - 1575 MHz - with RHCP and a high directive gain is proposed for indoor positioning applications.
Ozsoy, Kerem +3 more
core
Toward End-to-End, Full-Stack 6G Terahertz Networks
, 2020 Recent evolutions in semiconductors have brought the terahertz band in the spotlight as an enabler for terabit-per-second communications in 6G networks.
Jornet, Josep +3 more
core +1 more source
Qos Enhancement in Manet by Directional Power Control
Communications, 2014 In this paper, the 4-Way Directional Power Control with Recoil Loop (4WDPCRL) protocol for power control of directional antennas is presented. We propose the scheme with using of control packets (RTS/CTS/DATA/ACK) for exchanging information about node's ...
Tomas Cakan +2 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Plasmonic photocatalytic ammonia decomposition occurs at near‐room temperature on a plasmonic Au nanocone array under visible light illumination. The nanostructure efficiently harnesses plasmonic modes, leading to increased reaction rates upon plasmon decay.
Thanh‐Lam Bui +17 more
wiley +1 more source
SOFTWARE DEFINED ANTENNA TESTING
ICTACT Journal on Communication Technology, 2017 Micro strip patch directional antennas are an attractive solution for modern wireless systems due to their high gain and directivity. Being an attractive solution creates the need to design such devices for various application scenarios.
Dan Asabe Gambo +3 more
doaj +1 more source
Double Helical Plasmonic Antennas
Advanced Functional Materials, EarlyView.Plasmonic double helical antennas funnel circularly polarized light to the nanoscale, offering strong chiroptical interaction and directional light emission. Extending a single helix design tool, this study combines numerical modeling with experimental validation, revealing large, broadband dissymmetry factors in the visible range.
Aleksei Tsarapkin +7 more
wiley +1 more source
On Over-the-Air Testing for Devices With Directional Antennas
IEEE Access, 2020 This paper investigates the impact of devices under test (DUTs) with directional antennas on the recreated channel in the over-the-air (OTA) testing for massive multiple-input multiple-output (MIMO) devices using prefaded signal synthesis (PFS) technique.
Lijian Xin +3 more
doaj +1 more source