Results 41 to 50 of about 7,184 (178)
PAR-Aware Large-Scale Multi-User MIMO-OFDM Downlink [PDF]
, 2012 We investigate an orthogonal frequency-division multiplexing (OFDM)-based downlink transmission scheme for large-scale multi-user (MU) multiple-input multiple-output (MIMO) wireless systems.
Larsson, Erik G., Studer, Christoph
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Uplink MU-MIMO in Asynchronous Wireless LANs [PDF]
Proceedings of the Eighteenth ACM International Symposium on Mobile Ad Hoc Networking and Computing, 2018 In wireless LANs (WLANs), network-wide time and frequency synchronization among user devices is widely regarded as a necessity for uplink MU-MIMO. Therefore, to enable uplink MU-MIMO in 802.11ax, dedicated MAC protocols (e.g., trigger frame and timing advance mechanism) have been proposed to synchronize user devices in the time and frequency domains ...
Huacheng Zeng, Hongxiang Li, Qiben Yan
openaire +1 more source
IEEE 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
Multi-User MIMO with outdated CSI: Training, Feedback and Scheduling
, 2011 Conventional MU-MIMO techniques, e.g. Linear Zero-Forced Beamforming (LZFB), require sufficiently accurate channel state information at the transmitter (CSIT) in order to realize spectral efficient transmission (degree of freedom gains).
Adhikary, Ansuman +3 more
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Deep Reinforcement Learning for MU-MIMO Beamforming Training in mmWave WLAN
IEEE AccessIn 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
IEEE 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
Capacity-Achieving Iterative LMMSE Detection for MIMO-NOMA Systems
, 2016 This paper considers a iterative Linear Minimum Mean Square Error (LMMSE) detection for the uplink Multiuser Multiple-Input and Multiple-Output (MU-MIMO) systems with Non-Orthogonal Multiple Access (NOMA).
Guan, Yong Liang +3 more
core +2 more sources
, 2013 Block diagonalization (BD) based precoding techniques are well-known linear transmit strategies for multiuser MIMO (MU-MIMO) systems. By employing BD-type precoding algorithms at the transmit side, the MU-MIMO broadcast channel is decomposed into ...
de Lamare, R. C., Haardt, M., Zu, K.
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Performance analysis and optimal design of MU-MIMO transmission scheme based on IEEE 802.11ac
Tongxin 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
Joint Optimization of Power Allocation and Training Duration for Uplink Multiuser MIMO Communications [PDF]
, 2014 In this paper, we consider a multiuser multiple-input multiple-output (MU-MIMO) communication system between a base station equipped with multiple antennas and multiple mobile users each equipped with a single antenna.
Lu, Songtao +2 more
core +3 more sources