Results 31 to 40 of about 4,393 (215)

Millimeter-Wave Hybrid Beamforming Based on Implicit Channel State Information [PDF]

open access: yes, 2019
Millimeter wave (mmWave) spectrum above 30 GHz offers us an opportunity to pursue high-data-rate transmission using a channel bandwidth up to several gigahertz. To provide reliable link quality in mmWave frequency bands, hybrid analog-digital beamforming
Chiang, Hsiao-Lan
core   +2 more sources

Hybrid Beamforming for Active Sensing using Sparse Arrays [PDF]

open access: yes, 2020
This paper studies hybrid beamforming for active sensing applications, such as millimeter-wave or ultrasound imaging. Hybrid beamforming can substantially lower the cost and power consumption of fully digital sensor arrays by reducing the number of ...
Koivunen, Visa   +2 more
core   +1 more source

Near-Optimal Design for Hybrid Beamforming in mmWave Massive Multi-User MIMO Systems

open access: yesIEEE Access, 2020
Millimeter wave (mmWave) massive multiple-input multiple-output (MIMO) systems can obtain sufficient beamforming gains to combat severe path loss in signal propagation. The hybrid (analog/digital) beamforming with multiple data streams can be utilized to
Yang Zhang   +5 more
doaj   +1 more source

Hybrid Beamforming for Millimeter-Wave Heterogeneous Networks [PDF]

open access: yes, 2019
Heterogeneous networks (HetNets) employing massive multiple-input multiple-output (MIMO) and millimeter-wave (mmWave) technologies have emerged as a promising solution to enhance the network capacity and coverage of next-generation 5G cellular networks ...
Mostafa Hefnawi
core   +1 more source

Constrained Channel Decomposition-Based Hybrid Beamforming for mmWave Massive MIMO Systems

open access: yesIEEE Open Journal of the Communications Society, 2020
In this article, we propose a hybrid beamforming design for multiuser mmWave massive MIMO systems. We adopt a two-stage approach for designing the analog and digital beamforming separately. The analog beamforming design is based on a constrained low-rank
Guilherme Martignago Zilli, Wei-Ping Zhu
doaj   +1 more source

Optimal Hybrid Beamforming Design for Millimeter-Wave Massive Multi-User MIMO Relay Systems

open access: yesIEEE Access, 2019
As a promising technology in the next generation mobile network, millimeter-wave (mmWave) communication can mitigate the spectrum crunch of improving the network capacity by exploiting the large underutilized spectrum bands of the mmWave frequencies. The
Yang Zhang   +4 more
doaj   +1 more source

Optimization of Precoder and Combiner in mmWave Hybrid Beamforming Systems for Multi-user Downlink Scenario

open access: yesJournal 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

Hybrid Beamforming for Multi-User Millimeter-Wave Heterogeneous Networks [PDF]

open access: yes, 2022
Millimeter-wave (mmWave) communications are a critical technique with next-generation network characteristics such as ultra-dense small cells can meet the skyrocketing demand for mobile data. Hybrid precoding, which combines analog and digital processing
Tao Chen, Zhannan Li
core   +1 more source

Robust Hybrid Beamforming in Millimeter Wave Relay Networks With Imperfect CSI

open access: yesIEEE 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

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