Results 201 to 210 of about 184,691 (254)

Efficient multiuser MIMO scheduling strategies

IEEE 60th Vehicular Technology Conference, 2004. VTC2004-Fall. 2004, 2005
For multiuser MIMO (MU-MIMO) services, orthogonal multiple accesses, e.g., FDMA and TDMA are popular options to avoid multiuser interference. A high sum-rate is achievable in an MU-MIMO system where a common frequency or time resource is shared by multiple users if transmitters assume perfect knowledge of the corresponding channels.
null Pangan Ting, null Jung-Chieh Chen, null Chao-Kai Wen, null Jiunn-Tsair Chen   +3 more
openaire   +1 more source

Suboptimal Multiuser MIMO Techniques

2011
The previous chapter described the capacity regions of multiuser MIMO channels and techniques for achieving capacity. Due to the complexity of these optimal techniques, we are motivated to consider suboptimal multiuser MIMO techniques with lower complexity.
Howard Huang, Constantinos B. Papadias, Sivarama Venkatesan   +2 more
openaire   +1 more source

Time-Varying Channel Estimation for Millimeter Wave Multiuser MIMO Systems

IEEE Transactions on Vehicular Technology, 2018
Channel estimation for downlink millimeter wave (mmWave) multiuser multiple-input-multiple-output (MU-MIMO) communications over a time-varying channel is demandingly challenging. This is due to a massive number of channel coefficients to be estimated and
Qibo Qin, Lin Gui, Peng Cheng, B. Gong
semanticscholar   +1 more source

Hybrid Beamforming for Millimeter Wave Massive Multiuser MIMO Systems Using Regularized Channel Diagonalization

IEEE Wireless Communications Letters, 2019
This letter presents a novel hybrid analog-digital beamforming design for massive multiuser MIMO downlink transmission in sparse millimeter wave channels.
F. Khalid
semanticscholar   +1 more source

Near-Field Beamforming Optimization for Holographic XL-MIMO Multiuser Systems

IEEE Transactions on Communications
Extremely large-scale multiple-input multiple-output (XL-MIMO) communications and ultra-high frequency bands are both potential enablers for satisfying extreme performance requirements of future wireless systems.
Yihan Li, Shiqi Gong, Heng Liu, Chengwen Xing, Nan Zhao, Xianbin Wang   +5 more
semanticscholar   +1 more source

Multiuser MIMO downlink transmission using spatial modulation

2014 IEEE Latin-America Conference on Communications (LATINCOM), 2014
This paper presents a novel scheme to transmit signals in a Multiuser Multiple-Input Multiple-Output (MU-MIMO) downlink scenario. The proposed scheme uses the recently introduced Spatial Modulation (SM) technique to transmit a broadcast signal for multiple users.
F.R.C. Soria, J.S. Garcia, V.I.R. Abdala, R.P. Michel   +3 more
openaire   +1 more source

Multi-Objective Power Minimization Design for Energy Efficiency in Multicell Multiuser MIMO Beamforming System

IEEE Transactions on Green Communications and Networking, 2020
In this study, we propose a multi-objective power optimization design in a multicell multiuser multiple-input multiple-output (MIMO) beamforming system in the future era of green communications for energy efficiency.
Wei-Yu Chen, Po-Ya Hsieh, Bor‐Sen Chen
semanticscholar   +1 more source

Grouped multiuser diversity in multiuser MIMO systems exploiting spatial multiplexing

2006 IEEE International Symposium on Circuits and Systems, 2006
In order to improve the downlink capacity of a multiuser multiple input multiple output system exploiting spatial multiplexing, this paper proposes two grouped multiuser diversity schemes. Aiming at the suppression of co-channel interference, both schemes select a group of users to share the same time-frequency channel unit in two steps.
null Erlin Zeng, null Shihua Zhu, null Xuewen Liao   +2 more
openaire   +1 more source

Optimal Array size for Multiuser MIMO

2018 14th International Wireless Communications & Mobile Computing Conference (IWCMC), 2018
This paper investigates the optimal number of antennas at a base station, in contrast to what has been accepted in the past: that increasing the number of antennas at base station always enhances performance. In this study, we show that increasing the number of antennas does not always improve the desired performance.
Khalid W. Hameed, James M. Noras, Ayman Radwan, Fadi Al-Turjman, Jonathan Rodriguez, Raed A. Abd-Alhameed   +5 more
openaire   +1 more source

Alternating Minimization Algorithms for One-Bit Precoding in Massive Multiuser MIMO Systems

IEEE Transactions on Vehicular Technology, 2018
The use of low-cost and power-efficient hardware components has elicited considerable interest in the context of massive multiuser multiple-input and multiple-output (MIMO) systems because such hardware architecture enables significant power and cost ...
Jung-Chieh Chen
semanticscholar   +1 more source