Results 21 to 30 of about 14,760 (220)
High-Efficiency Expectation Propagation Detector for High-Order Massive MIMO Systems
IEEE Access, 2019 Multiple-inputs multiple-outputs (MIMO) technology, including massive MIMO, plays an important role in modern wireless communication systems. Massive MIMO systems with high-order modulation can promote spectrum efficiency.
Guoqiang Yao +3 more
doaj +1 more source
Entropy, 2020 As the core technology of 5G mobile communication systems, massive multi-input multi-output (MIMO) can dramatically enhance the energy efficiency (EE), as well as the spectral efficiency (SE), which meets the requirements of new applications.
Bin Jiang +5 more
doaj +1 more source
Massive MIMO at night: On the operation of massive MIMO in low traffic scenarios
2015 IEEE International Conference on Communications (ICC), 2015 For both maximum ratio transmission (MRT) and zero forcing (ZF) precoding schemes and given any specific rate requirement the optimal transmit power, number of antennas to be used, number of users to be served and number of pilots spent on channel training are found with the objective to minimize the total consumed power at the base station.
Hei Victor Cheng +3 more
openaire +3 more sources
CSI Feedback Based on Deep Learning for Massive MIMO Systems
IEEE Access, 2019 Aiming at the problem of high complexity and low feedback accuracy of existing channel state information (CSI) feedback algorithms for frequency-division duplexing (FDD) massive multiple-input multiple-output (MIMO) systems, this paper proposes a CSI ...
Yong Liao +3 more
doaj +1 more source
Massive MIMO as a cyber-weapon
2014 48th Asilomar Conference on Signals, Systems and Computers, 2014 A scheme for a multi-antenna jammer, jamming a SISO primary link working in TDD mode is presented. The jammer relies on reciprocity to estimate the channel to a terminal in the primary link blindly. The jammer can then beamform noise towards this user to degrade the performance of the primary link.
Karlsson, Marcus, Larsson, Erik G
openaire +3 more sources
Massive MIMO-NOMA Based MEC in Task Offloading for Delay Minimization
IEEE Access, 2023 Mobile edge computing (MEC) has been considered a promising technology to reduce task offloading and computing delay by enabling mobile devices to offload their computation-intensive tasks. Non-orthogonal multiple access (NOMA) is regarded as a promising
Saadet Simay Yilmaz, Berna Ozbek
doaj +1 more source
Direct Localization for Massive MIMO [PDF]
IEEE Transactions on Signal Processing, 2017 Large-scale MIMO systems are well known for their advantages in communications, but they also have the potential for providing very accurate localization thanks to their high angular resolution. A difficult problem arising indoors and outdoors is localizing users over multipath channels. Localization based on angle of arrival (AOA) generally involves a
Nil Garcia +4 more
openaire +5 more sources
Analysis and Design of Channel Estimation in Multicell Multiuser MIMO OFDM Systems [PDF]
, 2014 This paper investigates the uplink transmission in multicell multiuser multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) systems. The system model considers imperfect channel estimation, pilot contamination (PC), and
Xu, Peng +3 more
core +1 more source
IEEE Access, 2018 By enabling very high bandwidth for radio communications, the millimeter-wave (mmWave), which can easily be integrated with massive-multiple-input-multiple-output (massive-MIMO) due to small antenna size, has been attracting growing attention as a ...
Wenchi Cheng +4 more
doaj +1 more source
Multi-Panel Sparse Base Station Design with Physical Antenna Effects in Massive MU-MIMO [PDF]
, 2020 A novel base station antenna (BSA) configuration is presented to mitigate degrading physical antenna effects in massive multiple-input multiple-output (MIMO) systems, while minimizing implementation complexities.
Ivashina, Marianna +11 more
core +1 more source