Results 61 to 70 of about 4,370 (213)
FlexMat, EarlyView.This review organizes flexible wearable electronics for cardiovascular monitoring into four interconnected information layers: surface electrophysiology, hemodynamic sensing, vascular imaging, and biofluid biomarker analysis. This framework clarifies how electrical rhythm, vascular loading, structural and flow‐related features, and biochemical states ...
Qiao Chen +5 more
wiley +1 more source
Deep learning approach for hybrid beamforming design in MU-MISO mmWave systems
Scientific ReportsHybrid beamforming is a promising approach to alleviate hardware complexity in multi-user multiple-input single-output (MU-MISO) systems while maintaining high data rate performance.
Ebrahim Ghaith +3 more
doaj +1 more source
Joint User Scheduling and MU-MIMO Hybrid Beamforming Algorithm for mmWave FDMA Massive MIMO System
International Journal of Antennas and Propagation, 2016 The large bandwidth and multipath in millimeter wave (mmWave) cellular system assure the existence of frequency selective channels; it is necessary that mmWave system remains with frequency division multiple access (FDMA) and user scheduling. But for the
Jing Jiang, Deting Kong
doaj +1 more source
Directional modulation design for multi-beam multiplexing based on hybrid antenna array structures
EURASIP Journal on Advances in Signal Processing, 2023 For integrated sensing and communication, one important research direction is to employ various beamforming techniques to avoid interference between the two functions.
Maolin Li +5 more
doaj +1 more source
Review of millimeter‐wave and terahertz near‐field synthetic aperture radar imaging technology
InfoScience, EarlyView.Abstract This paper comprehensively reviews the development of millimeter‐wave (MMW) and terahertz (THz) near‐field imaging technologies, with an emphasis on the state of synthetic aperture radar (SAR)‐based imaging technologies. Near‐field imaging technologies are categorized into passive and active imaging modes, among which active imaging is favored
Qi Yang +3 more
wiley +1 more source
A low complexity hybrid combiner design for the ill‐conditioned multiuser mmWave massive MIMO uplink
IET Communications, 2021 This paper presents a simple and robust hybrid combiner for the multiuser massive multiple‐input multiple‐output (MIMO) uplink. The hybrid beamforming is used in massive MIMO systems to reduce the number of radio frequency chains.
Irfan Ahmed +2 more
doaj +1 more source
QoS-Aware Hybrid Beamforming With Minimal Power in mmWave Massive MIMO Systems
IEEE Access, 2021 Hybrid beamforming is used to leverage the benefits of both massive multiple input and multiple output (MIMO) systems and millimeter waves for significantly increasing the capacity of wireless networks. Existing schemes for hybrid beamforming in multiple
Mohsen Tajallifar +2 more
doaj +1 more source
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT As non‐terrestrial networks (NTNs) become integral to future 6G systems, ensuring seamless connectivity and service continuity over low Earth orbit (LEO) satellite constellations is essential. This work investigates the impact of open radio access network (RAN) functional splits on handover performance in NTNs, focusing on minimizing service ...
Siva Satya Sri Ganesh Seeram +3 more
wiley +1 more source
Spectral Efficiency of mmWave Massive MIMO Systems with Hybrid Beamforming
Wasit Journal of Engineering SciencesMillimeter wave communications (mmWave) has been considered a key enabling technique for 5G systems since it offers orders of magnitude more spectrum than current frequency bands.
Sajjad Kadhim +5 more
doaj +1 more source