Results 31 to 40 of about 1,380,112 (215)
Robust Hybrid Beamforming in Millimeter Wave Relay Networks With Imperfect CSI
IEEE Access, 2018 Millimeter-wave (mmWave) communication offers rich spectrum resources and acts as a key enabling technology for future wireless communication systems. Hybrid (digital and analog) beamforming and relay techniques are important for mmWave implementations ...
Zhen Luo +3 more
doaj +1 more source
Journal of Applied Science and Engineering, 2021 Beamforming at millimeter-wave (mmWave) band, promises to significantly support 5G networks in achieving their performance goals. The conventional digital beamforming uses a separate RF chain for each antenna element, while it leads to high cost and ...
Abdul Haq Nalband +2 more
doaj +1 more source
Multiuser hybrid analog/digital beamforming for relatively large-scale antenna arrays
, 2013 Power consumption and costs of the analog front-end (AFE) chains are often not negligible for large-scale antenna array systems. A low-complexity hardware architecture is to use a number of AFE chains that is less than the number of the antennas ...
Xiang, Wei +9 more
core +1 more source
Multi-user hybrid analogue/digital beamforming for relatively large-scale antenna systems
, 2014 Power consumption and costs of analogue front-end (AFE) chains are often not negligible for large-scale antenna array systems. A low-complexity hardware architecture is to use a number of AFE chains that are less than the number of antennas.
Xiang, Wei +4 more
core +1 more source
Bioengineering, 2023 Low-complexity ultrasound systems are increasingly desired for both wearable, point-of-care ultrasound and high-end massive-channel ultrasound for 3-D matrix imaging.
Heechul Yoon +3 more
doaj +1 more source
Alternating minimum mean square error hybrid beamforming algorithm in mmWave MIMO system
Dianxin kexue, 2017 The two-stage hybrid beamforming architecture can solve the problem of limited number of RF chains effectively.However,it is still difficult to design a hybrid beamforming algorithm with better performance.In order to achieve higher spectral efficiency ...
Min SHEN, Hao XU, Yun HE, Pengguang ZHOU
doaj +2 more sources
2D-OPC Subarray Structure for Efficient Hybrid Beamforming over Sparse mmWave Channels
International Journal of Antennas and Propagation, 2021 Millimeter-wave (mmWave) communication is a key technology of 5G new radio (NR) mobile communication systems. Efficient beamforming using a large antenna array is important to cope with the significant path loss experienced in the mmWave spectrum.
Junhyuk Yoo, Wonjin Sung, In-Kyung Kim
doaj +1 more source
Metasurface‐Based Multidimensional Light‐Field Manipulation: From Technologies to Applications
Advanced Science, EarlyView.Multidimensional metasurfaces enable versatile manipulation of multiple optical degrees of freedom, including phase, amplitude, polarization, wavelength, and orbital angular momentum. This review summarizes their fundamental mechanisms, emerging strategies for multidimensional light‐field control, and key applications in optical computing, imaging ...
Heliang Yin +6 more
wiley +1 more source
Multiple-Beam Selection With Limited Feedback for Hybrid Beamforming in Massive MIMO Systems
IEEE Access, 2017 Hybrid multiple-input multiple-output (MIMO) systems have been thought as a promising technology in future 5G. Compared with conventional digital MIMO systems, such a structure is equipped with fewer RF chains, which would reduce the computational ...
Yuwei Ren +3 more
doaj +1 more source
Taxonomy and Performance Evaluation of Hybrid Beamforming for 5G and Beyond Systems
IEEE Access, 2020 Increasing demand for higher data-rate wireless connectivity with lower latency is fueling the explorations of millimeter-wave (mmWave) spectrum and massive MIMO communications.
Mohamed Rihan +4 more
doaj +1 more source