Results 21 to 30 of about 996,599 (191)

Performance analysis of precoding-aided differential spatial modulation systems with transmit antenna selection

ETRI Journal, 2021
In this paper, the performance of precoding-aided differential spatial modulation (PDSM) systems with optimal transmit antenna subset (TAS) selection is examined analytically.
Sangchoon Kim
doaj   +1 more source

Capacity Analysis of Lattice Reduction Aided Equalizers for Massive MIMO Systems

Information, 2020
Massive multi-input-multi-output (MIMO) systems are the future of the communication system. The proper design of the MIMO system needs an appropriate choice of detection algorithms. At the same time, Lattice reduction (LR)-aided equalizers have been well
Samarendra Nath Sur, Rabindranath Bera, Akash Kumar Bhoi, Mahaboob Shaik, Gonçalo Marques   +4 more
doaj   +1 more source

Spectral-Efficiency of TDD Multiuser Two-Hop MC-CDMA Systems Employing Egocentric-Altruistic Relay Optimization [PDF]

, 2010
In this contribution we investigate the spectral-efficiency of a two-hop cooperative network using multicarrier code-division multiple-access (MC-CDMA) transmission scheme.
Tingting Liu, Yang, Lie-Liang, Lie-Liang Yang, Chenyang Yang, Liu, Tingting, Yang, Chenyang   +5 more
core   +2 more sources

Block diagonal GMD for zero-padded mimo frequency selective channels with zero-forcing DFE [PDF]

, 2010
In the class of systems with linear precoder and zero-forcing (ZF) DFE for zero-padded MIMO frequency selective channels, existing optimal transceiver designs present two major drawbacks.
P. P. Vaidyanathan, Ching-Chih Weng, Weng, Ching-Chih, Vaidyanathan, P. P.   +3 more
core   +1 more source

Singular value decomposition-based multiuser multiple-input multiple-output vector perturbation-aided downlink transmitter and lattice-reduction-assisted uplink receiver pair [PDF]

, 2012
: A full-duplex uplink/downlink (UL/DL) system having a UL transmitter/receiver (transceiver) pair and a DL transceiver is considered. Both the UL and DL are improved.
Li, J.-D., Liu, Wei, Li, C, Hanzo, Lajos
core   +1 more source

Performance Analysis of Precoding Based on Massive MIMO System

MATEC Web of Conferences, 2015
In order to improve the system performance, the authors consider a single-cell multiuser Massive MIMO downlink time-division duplex (TDD) system for the imperfect channel state information (CSI).
Li Yi, Wang Junxuan, Gao Zhenzhen
doaj   +1 more source

Line graphs: their maximum nullities and zero forcing numbers [PDF]

, 2008
summary:The maximum nullity over a collection of matrices associated with a graph has been attracting the attention of numerous researchers for at least three decades.
Fallat, Shaun, Wang, Wendy, Johnson, Charles, Harris, Benjamin, Lay, Margaret, Soltani, Abolghasem, Mitchell, Lon, Narayan, Sivaram, Steinmetz, Kelly, Sutton, Brian, Hackney, Philip, Booth, Mathew, Pascoe, Amanda   +12 more
core   +1 more source

Laser‐Induced Ultrafast Magnetic Phase Transition in 2D Van Der Waals Antiferromagnetic Heterostructures

Advanced Science, EarlyView.
In this work, ultrafast laser‐induced spin transfer and spin relaxation dynamics in 2D van der Waals antiferromagnetic CrI3/CrGeTe3 heterostructures are investigated. Laser excitation is demonstrated to induce pronounced interlayer nonequilibrium spin dynamics and ultrafast magnetic moment reconstruction, driving a transition from an antiferromagnetic (
Yang Wu, Fulu Zheng, San‐Dong Guo, Thomas Frauenheim, Zhaobo Zhou, Junjie He   +5 more
wiley   +1 more source

Propagation time for probabilistic zero forcing [PDF]

, 2018
Zero forcing is a coloring game played on a graph that was introduced more than ten years ago in several different applications. The goal is to color all the vertices blue by repeated use of a (deterministic) color change rule. Probabilistic zero forcing
Hogben, Leslie, Geneson, Jesse
core  

Novel Leakage-Based Capacity Enhancement Scheme for Multi-User OAM Communications

IEEE Access
This paper explores a novel leakage-based capacity enhancement scheme in an orbital angular momentum (OAM) integrated multiuser MIMO system, where the leakage refers to the signal interference affecting other users.
Aye Yadanar Win, Merhawit Berhane Teklu, Yeon Ho Chung   +2 more
doaj   +1 more source