Results 21 to 30 of about 38,046,255 (222)
Spectral Efficiency Optimization of Uplink Millimeter Wave MIMO-NOMA Systems
Sensors, 2022 In this paper, we considered uplink communication, focusing on the improvement of spectral efficiency (SE) for millimeter wave (mmWave) multiple-input multiple-output non-orthogonal multiple access (MIMO-NOMA) systems.
Yinhao Zhang +5 more
doaj +1 more source
IEEE Access, 2022 Beamforming is the fundamental concept of wireless communications to serve several users through multiple-antenna transceivers. The advent of massive multiple-input multiple-output (MIMO) systems leads to an investigation into beamforming to reach ...
Jamal Beiranvand +3 more
doaj +1 more source
Low Complexity and Robust Codebook-Based Analog Beamforming for Millimeter Wave MIMO Systems
IEEE Access, 2017 Millimeter-wave (mm-Wave) MIMO systems have been proposed to achieve higher spectral efficiency via the hybrid beamforming structure, which consists of analog beamforming and digital beamforming.
Yong Niu +5 more
doaj +1 more source
Wideband analog and digital beamforming [PDF]
2009 9th International Conference on Telecommunication in Modern Satellite, Cable, and Broadcasting Services, 2009 High quality beamforming is necessary for the integrity of phased arrays and accuracy of monopulse direction finding systems. Traditionally, beamformers are realized as hybrid or monolithically integrated analog sub-systems. Their wideband operation is plagued by higher loss, amplitude and phase misbalances, weight, complex integration, etc.
Kasemir, Paul +5 more
openaire +2 more sources
, 2023 <p><strong>Full Changelog</strong>: https://github.com/jdassink/beamforming/commits/beamforming</p ...
Jelle Assink
core +1 more source
Transceiver Design in Millimeter Wave Full-Duplex Multi-User Massive MIMO Communication Systems
IEEE Access, 2021 We consider hybrid transmit precoding and receive combining in a millimeter wave (mmWave) multiple-input multiple-output (MIMO) multi-user cellular system, where a full-duplex (FD) base station (BS) serves multiple half-duplex (HD) uplink and downlink ...
Mostafa Darabi +2 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
IEEE Access, 2019 Medium-scale or large-scale receive antenna array with digital beamforming can be employed at receiver to make a significant interference reduction but leads to expensive cost and high complexity of the RF-chain circuit.
Linlin Sun +7 more
doaj +1 more source
Adaptive Beamforming With Software-Defined-Radio Arrays
IEEE Access, 2022 Digital beamforming is the holy grail of antenna array technologies, however implementing digital beamforming into practical antenna arrays has been slow due to hardware complexity and cost.
Daniel Christopher Gaydos +2 more
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Using of Deep Learning in Beamforming Antenna Array
Wasit Journal of Engineering SciencesDigital beamforming (DBF) is a crucial technology for large antenna arrays, offering precise control over beam steering. This research introduces a novel method to enhance millimeter wave transmission by incorporating DBF with long-term memory (LSTM ...
Ali Naji +2 more
doaj +1 more source