Results 61 to 70 of about 2,697,618 (222)
Benefits of Beamforming Training Scheme in Distributed Large-Scale MIMO Systems
IEEE Access, 2018 The downlink training yields rather modest performance gains due to the high degree of channel hardening effect in co-located large-scale multi-input multi-output (MIMO) systems. However, in distributed large-scale MIMO systems, the potential benefits of
Jiamin Li +3 more
doaj +1 more source
IEEE Photonics Journal, 2020 Optical mobile communication (OMC) provides a hopeful vision to handle with wireless communication scenarios where multiple mobile users are involved.
Jiajun Gao +3 more
doaj +1 more source
Dynamic Fluorescence Modulation via Light‐Driven Competitive Protonation
Advanced Optical Materials, EarlyView.A two‐component molecular system demonstrates reversible, light‐driven fluorescence write–erase cycling and thermal imaging. Illumination of a merocyanine photoacid transfers a proton to a highly efficient fluorescent pyridinium dye, switching its emission color; thermal relaxation reverses the process in the dark.
Serena X. Liu +10 more
wiley +1 more source
Energy Efficient Joint Power Optimization for Full-Duplex Relaying
IEEE Access, 2019 Full-duplex (FD) relaying is a promising technology for the next generation communication systems. In this paper, we aim to jointly optimize the source and relay transmit powers to maximize the energy efficiency (EE) for both amplify-and-forward (AF) and
Zhenyao He +3 more
doaj +1 more source
Advanced Robotics Research, EarlyView.Visual teach‐and‐repeat (VTR) navigation allows robots to learn and follow routes without building a full metric map. We show that navigation accuracy for VTR can be improved by integrating a topological map with error‐drift correction based on stereo vision.
Fuhai Ling, Ze Huang, Tony J. Prescott
wiley +1 more source
Personal Mobile Server / Center for the Study of Mobile Devices and Communications [PDF]
, 2012 A personal server is any small, light-weight, battery-powered mobile device with capability for data storage and some form of wireless connectivity means such as Bluetooth and 802.11.
Gurminder, Singh +1 more
core +2 more sources
Optimized Full-Duplex MIMO DF Relaying With Limited Dynamic Range
IEEE Access, 2017 This paper investigates the transceiver optimization of full-duplex multiple-input multipleoutput decode-and-forward (DF) relaying by taking into account the practical factor of limited dynamic range (LDR).
Hong Shen +3 more
doaj +1 more source
Waveguide Photoactuators: Materials, Fabrication, and Applications
Advanced Robotics Research, EarlyView.Waveguide photoactuators convert guided light into mechanical motion. Their tethered‐flexible design enables minimally invasive surgery and confined‐space robotics. This review aims to guide materials selection, device design, and system integration, accelerating the transition of waveguide photoactuators from laboratory prototypes to versatile ...
Minjie Xi +4 more
wiley +1 more source
A Pilot Allocation Algorithm Based on Coalitional Game Theory for Distributed MIMO Systems
IEEE Access, 2019 With the advent of the 5G era, the number of user terminals has increased dramatically. However, the limitation of pilot resources results in pilot reuse among user terminals, which makes the performance of massive multiple-input-multiple-output (MIMO ...
Pengcheng Zhu +3 more
doaj +1 more source
Robotics in Ionizing Radiation Environments: Vulnerabilities, Hardening, and Future Directions
Advanced Robotics Research, EarlyView.Radiation exposure causes cumulative degradation in robotic sensors, actuators, and electronic logic, often leading to undetected failures. This study maps component vulnerabilities, evaluates hardening and shielding strategies, and identifies testing gaps that must be addressed to enable next‐generation radiation‐tolerant robotic systems.
Francis A. K. Djirackor +4 more
wiley +1 more source