Results 51 to 60 of about 38,046,255 (222)
IEEE Access, 2021 In this paper, we consider the decode-and-forward (DF) relay system in millimeter-wave (mmWave) massive multiple-input multiple-output (MIMO) systems, and propose a hybrid beamforming design method for the mixed structure, which contains the fully ...
Meng Han +5 more
doaj +1 more source
Recent Advances in Programmable Metasurfaces and Meta‐Devices
Advanced Electronic Materials, EarlyView.Programmable metasurfaces enable various novel functionalities by dynamically tuning electromagnetic wavefronts. This article provides a comprehensive review of recent advances in microwave and terahertz programmable metasurfaces, covering electrical, thermal, optical, and mechanical control mechanisms.
Linda Shao +4 more
wiley +1 more source
Digital Beamforming: A Paradigm Shift for Spaceborne SAR [PDF]
, 2013 Spaceborne Synthetic Aperture Radar (SAR) provides high-resolution, day-and-night and weather-independent images for a multitude of applications ranging from geoscience and climate change research, environmental monitoring, global 2-D and 3-D mapping ...
Moreira, Alberto
core
Ambiguity Suppression by Azimuth Phase Coding in Multichannel SAR Systems [PDF]
, 2011 The Azimuth Phase Coding (APC) technique, proposed to suppress range ambiguities in conventional SAR systems, stands out for its low implementation complexity and its effectiveness for point and distributed ambiguities.
Bordoni, Federica +5 more
core +1 more source
Minimum symbol error rate turbo multiuser beamforming aided QAM receiver [PDF]
, 2008 This paper studies a novel iterative soft interference cancellation (SIC) aided beamforming receiver designed for high-throughput quadrature amplitude modulation systems communicating over additive white Gaussian noise channels.
Chen, Sheng, Tan, S, Hanzo, L
core +3 more sources
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
Analog Current-Mode 8-Point Approximate-DFT Multi-Beamformer With 4.7 Gbps Channel Capacity
IEEE Access, 2023 This paper describes a current-mode on-chip analog architecture suitable for multi-beamforming of IF band signals from small- to moderate-sized antenna arrays.
Haixiang Zhao +3 more
doaj +1 more source
Kaleidoscopic Electromagnetic Wave Manipulation via a Universal Reconfigurable Metasurface Platform
Electron, EarlyView.A multidimensional reconfigurable metasurface enables independent control of the amplitude, phase, polarization, and spectral responses of reflected electromagnetic (EM) waves. Integrating spatial, polarization, and spectral manipulation within a single platform, it provides a versatile solution for intelligent EM systems, next‐generation wireless ...
Wanting Tong +9 more
wiley +1 more source
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
Predictive Digital Twin-Assisted Geometry-Aware Uncertainty-Adaptive Beamforming for ISAC
IEEE AccessIntegrated Sensing and Communication (ISAC) is becoming an important part of sixth-generation (6G) wireless networks, where the same radio resources are used for both data transmission and environmental sensing. In practical systems, however, beamforming
Anwitha Vishwanath +3 more
doaj +1 more source