Results 21 to 30 of about 39,121 (219)
Robust Beamforming for Ultrasonic Imaging using Wavelet-based Thresholding and Coherence Weighting [PDF]
International Journal of Industrial Electronics, Control and OptimizationThe delay-and-sum (DS) beamforming and delay-weight-and-sum (DWS) beamforming are primary methods in ultrasonic imaging with phased arrays. Total focusing method (TFM) and Minimum Variance (MV) based adaptive beamforming are well-known methods within DS ...
Mozhgan Ehsani +2 more
doaj +1 more source
A novel joint transmit beamforming and receive time switching strategy for MISO SWIPT system
EURASIP Journal on Wireless Communications and Networking, 2018 In multi-antenna simultaneous wireless information and power transfer (SWIPT) system, beamforming strategy has been widely analyzed due to the increasing signal strength.
Lin Ma +4 more
doaj +1 more source
New perspective on single-radiator multiple-port antennas for adaptive beamforming applications. [PDF]
PLoS ONE, 2017 One of the most challenging problems in recent antenna engineering fields is to achieve highly reliable beamforming capabilities in an extremely restricted space of small handheld devices.
Gangil Byun, Hosung Choo
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Open-Loop Beamforming Technique for MIMO System and Its Practical Realization
International Journal of Antennas and Propagation, 2011 The concept of close-loop beamforming for MIMO system was well known proposed the singular value decomposition on channel matrix. This technique can improve the capacity performance, but the cost of feedback channel and the complexity processing discard
Peerapong Uthansakul +2 more
doaj +1 more source
An applicable 5.8 GHz wireless power transmission system with rough beamforming to Project Loon
ICT Express, 2016 In recent, Google proposed the Project Loon being developed with the mission of providing internet access to rural and remote areas using high-altitude balloons.
Chang-Jun Ahn
doaj +1 more source
IEEE Access, 2022 The goal of this paper is to evaluate the performance of an adaptive beamforming approach in fifth-generation millimeter-wave multicellular networks, where massive multiple-input multiple-output configurations are employed in all active base stations of ...
Spyros Lavdas +5 more
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Impact of Beamforming on the Path Connectivity in Cognitive Radio Ad Hoc Networks
Sensors, 2017 This paper investigates the impact of using directional antennas and beamforming schemes on the connectivity of cognitive radio ad hoc networks (CRAHNs).
Le The Dung +4 more
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Impact of Beamforming Algorithms on the Actual RF EMF Exposure From Massive MIMO Base Stations
IEEE Access, 2023 Base stations equipped with large multi-antenna systems and associated beamforming schemes provide large capacity and coverage. Massive multiple-input-multiple-output (MIMO) with beamforming was introduced as one of the enablers of 5G system performance,
Marcin Rybakowski +3 more
doaj +1 more source
Advanced Functional Materials, EarlyView.The study proposes a 1‐bit programmable metasurface based on flip‐disc display, named flip‐disc metasurface (FD‐MTS). This new design enables ultralow energy consumption while maintaining coding patterns. It also exhibits high scalability and multifunctional flexibility.
Jiang Han Bao +8 more
wiley +1 more source
Joint Control of Radiated and Surface Waves via Space‐Time Coding Metasurfaces
Advanced Functional Materials, EarlyView.A unified space‐time coding metasurface platform enables simultaneous control of radiated and surface‐confined waves across multiple harmonics. Demonstrated functionalities include multi‐frequency beam shaping; surface‐wave excitation, and hybrid multiplexing.
Zihao Dai +6 more
wiley +1 more source