Results 171 to 180 of about 4,393 (215)
A Broader Survey on 6G Radio Resource Management. [PDF]
Sensors (Basel)de Faria AJ +3 more
europepmc +1 more source
A Novel Starfish Optimization Algorithm for Secure STAR-RIS Communications. [PDF]
Biomimetics (Basel)Gafar M +3 more
europepmc +1 more source
Adaptive Optical Processing for Wideband Hybrid Beamforming [PDF]
IEEE Transactions on Communications, 2019 Multiuser centralized radio access networks (C-RANs) need to adapt to time-varying radio environments, and adaptation is advantageously split between remote antenna units (RAUs) and centralized baseband units (BBUs) to minimize the required fronthaul throughput.
Combi L., Spagnolini U.
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Two-bit hybrid beamforming for broadcasting [PDF]
2016 24th Signal Processing and Communication Application Conference (SIU), 2016 In this paper, a hybrid system consisting of analog and digital beamformers is proposed to reduce the hardware complexity of full digital beamforming. In analog beamforming part, specially chosen two-bit radio frequency (RF) phase shifters are used.
Ozlem Tugfe Demir, Temel Engin Tuncer
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Design of Millimeter Wave Hybrid Beamforming Systems [PDF]
2014 IEEE 80th Vehicular Technology Conference (VTC2014-Fall), 2014 Millimeter wave (mmWave) signals experience a significant path-loss in free space. To overcome this weakness, a large number of antennas are needed to obtain a high beamforming gain.
Girim Kwon +3 more
core +4 more sources
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2023
In mmWave massive MIMO, the required number of radio frequency (RF) chains becomes impractical due to the expensive and power-hungry components such as variable gain power amplifiers, filters, mixers, and analog-to-digital/digital-to-analog converters (ADCs/DACs). A promising solution to this problem is reducing the number of radiofrequency (RF) chains
Mostafa Hefnawi, Jamal Zbitou
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In mmWave massive MIMO, the required number of radio frequency (RF) chains becomes impractical due to the expensive and power-hungry components such as variable gain power amplifiers, filters, mixers, and analog-to-digital/digital-to-analog converters (ADCs/DACs). A promising solution to this problem is reducing the number of radiofrequency (RF) chains
Mostafa Hefnawi, Jamal Zbitou
openaire +1 more source
Wideband Beamforming for Hybrid Massive MIMO Terahertz Communications [PDF]
IEEE Journal on Selected Areas in Communications, 2021 The combination of large bandwidth at terahertz (THz) and the large number of antennas in massive MIMO results in the non-negligible spatial wideband effect in time domain or the corresponding beam squint issue in frequency domain, which will cause ...
Bolei Wang, Chengwen Xing, Feifei Gao
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Analysis of diversity, beamforming and hybrid diversity-beamforming systems
2003 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03)., 2004In this paper we compare Shannon capacities of diversity, beamforming, and hybrid diversity-beamforming systems for reverse and forward links. Our results show that the reverse link capacity of a diversity system is higher than that of a beamforming system, while the beamforming system can provide higher capacity than the diversity system in the ...
Mahdi Nezafat, Mostafa Kaveh
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Deep Learning for SVD and Hybrid Beamforming
IEEE Transactions on Wireless Communications, 2020Hybrid beamforming (BF), which divides BF operation into radio frequency (RF) and baseband (BB) domains, will play a critical role in MIMO communication at millimeter-wave (mmW) frequencies. In principle, we can obtain unconstrained (optimum) beamformers of a transceiver, which approach the maximum achievable data rates, through its singular value ...
Ture Peken +3 more
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