Results 41 to 50 of about 724 (180)

A low‐complexity transmit combining method for downlink of massive multiuser multiple input multiple output systems

open access: yesElectronics Letters, 2023
Multiuser multiple input multiple output (MU‐MIMO) systems can provide high spectral efficiency (SE) that is achieved with transmit/receive combining schemes at the base station (BS) for downlink (DL) and uplink (UL).
Rade P. Dabetic, Goran B. Markovic
doaj   +1 more source

Optimized Precoding for MU-MIMO With Fronthaul Quantization

open access: yesIEEE Transactions on Wireless Communications, 2023
One of the first widespread uses of multi-user multiple-input multiple-output (MU-MIMO) is in 5G networks, where each base station has an advanced antenna system (AAS) that is connected to the baseband unit (BBU) with a capacity-constrained fronthaul.
Yasaman Khorsandmanesh   +2 more
openaire   +2 more sources

Multiuser MIMO Precoders With Proactive Primary Interference Cancelation and Link Quality Enhancement for Cognitive Radio Relay Systems

open access: yesIEEE Access, 2017
A novel multiuser multiple-input multiple-output (MU-MIMO) cognitive radio (CR) system with an improved received signal-to-interference-noise ratio (SINR) and enhanced primary user (PU) interference suppression is proposed for systems with the ...
Juinn-Horng Deng   +2 more
doaj   +1 more source

Proportional Fair MU-MIMO in 802.11 WLANs [PDF]

open access: yesIEEE Wireless Communications Letters, 2014
We consider the proportional fair rate allocation in an 802.11 WLAN that supports multi-user MIMO (MU-MIMO) transmission by one or more stations. We characterise, for the first time, the proportional fair allocation of MU-MIMO spatial streams and station transmission opportunities. While a number of features carry over from the case without MU-MIMO, in
Víctor Valls, Douglas J. Leith
openaire   +3 more sources

Deep Reinforcement Learning for MU-MIMO Beamforming Training in mmWave WLAN

open access: yesIEEE Access
In IEEE 802.11ay wireless local area network (WLAN), a single access point (AP) performs multi-user multiple-input-multiple-output (MU-MIMO) beamforming training (BFT) to enable simultaneous directional communications with multiple stations (STAs ...
Buseong Jo, Mun-Suk Kim, Sukyoung Lee
doaj   +1 more source

Precoding Design for Multiuser MIMO Downlink Communication Systems Using an LQ-Based Cascade GSIC Algorithm

open access: yesIEEE Access, 2017
This paper proposes a novel LQ-based generalized side-information cancellation (GSIC) precoder for multiuser multi-input multi-output (MU-MIMO) downlink systems with sum-rate performance enhancement.
Juinn-Horng Deng   +2 more
doaj   +1 more source

Matched Filtering in Massive MU-MIMO Systems [PDF]

open access: yes, 2021
<p>This thesis considers the analysis of matched filtering (MF) processing in massive multi-user multiple-input-multiple-output (MU-MIMO) wireless communication systems. The main focus is the analysis of system performance for combinations of two linear processers, analog maximum ratio combining (MRC) and digital MRC.
openaire   +2 more sources

Performance analysis and optimal design of MU-MIMO transmission scheme based on IEEE 802.11ac

open access: yesTongxin xuebao, 2013
The recent IEEE 802.11ac adopted a novel multi-user access technique,which was the downlink multi-user MIMO (MU-MIMO) transmission.This was very different from the former IEEE 802.11 standard's protocols.The MU-MIMO transmission technique in IEEE 802 ...
Bao-feng JI   +3 more
doaj   +2 more sources

Fundamental Challenges, Physical Implementations, and Integration Strategies for Ising Machines in Large‐Scale Optimization Tasks

open access: yesAdvanced Electronic Materials, EarlyView.
Ising machines are emerging as specialized hardware solvers for computationally hard optimization problems. This review examines five major platforms—digital CMOS, analog CMOS, emerging devices, coherent optics, and quantum systems—highlighting physics‐rooted advantages and shared bottlenecks in scalability and connectivity.
Hyunjun Lee, Joon Pyo Kim, Sanghyeon Kim
wiley   +1 more source

Precoded Generalized Spatial Modulation for Downlink MIMO Transmissions in Beyond 5G Networks

open access: yesApplied Sciences, 2020
The design of multiple input multiple output (MIMO) schemes capable of achieving both high spectral and energy efficiency constitutes a challenge for next-generation wireless networks. MIMO schemes based on generalized spatial modulations (GSM) have been
João Pedro Pavia   +4 more
doaj   +1 more source

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