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Evolution of reference signals for LTE-advanced systems
2012
IEEE Communications Magazine
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Enhancements Aimed at Improving MU-MIMO Performance -From the viewpoint of DMRS orthogonality, MU-MIMO schemes are categorized into two types, identical-band MU-MIMO and non-identical-band MU-MIMO, and ...
OCC is used to realize non-identical-band MU-MIMO. ...
doi:10.1109/mcom.2012.6146492
fatcat:5ayxj4phozfsvj7zysny4c2scu
Distributed precoder design for inter-cell interference suppressing in multi-cell MU-MIMO systems
2013
2013 IEEE Wireless Communications and Networking Conference (WCNC)
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In this paper, we design a distributed precoder algorithm for inter-cell interference (ICI) suppressing and maximizing the average throughput of a multi-cell multi-user multi-input multi-output (MU-MIMO ...
As the problem of finding the optimal precoder is non-convex and non-trivial, it is important to find low-complexity solutions. ...
In this paper, we study how to design distributed algorithms for multi-cell MU-MIMO systems. ...
doi:10.1109/wcnc.2013.6554768
dblp:conf/wcnc/WangYZD13
fatcat:v4mo66h4lzbvhmt5w3bposrjde
An efficient user scheduling scheme for downlink Multiuser MIMO-OFDM systems with Block Diagonalization
2013
International Journal of Advanced Computer Science and Applications
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In particular, Block Diagonalization (BD) scheme is a low-complexity precoding technique for MU-MIMO downlink channels, which completely pre-cancels the multiuser interference. ...
The combination of multiuser multiple-input multiple-output (MU-MIMO) technology with orthogonal frequency division multiplexing (OFDM) is an attractive solution for next generation of wireless local area ...
By doing so, the downlink system reduces to parallel non-interfering single user MIMO channels, where the equivalent independent channel after precoding for the th user on the th subcarrier is expressed ...
doi:10.14569/ijacsa.2013.040514
fatcat:decz63ux4rdx3blm5rgtyzk2z4
MIMO techniques in WiMAX and LTE: a feature overview
2010
IEEE Communications Magazine
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CRSs are transmitted via physical antenna ports without a spatial precoder to allow for channel measurements of the non-precoded MIMO channel. ...
In the DL 802.16m also introduced OL MU-MIMO, where a unitary precoding matrix is preset for each frequency-domain resource. ...
doi:10.1109/mcom.2010.5458368
fatcat:mh5j3i5uejcovaf5kvh5anujti
Multi-user MIMO linear precoding schemes in OFDM systems
2010
2010 3rd International Conference on Computer Science and Information Technology
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In this paper, several multi-user multiple-input multiple-output (MU-MIMO) linear precoding schemes with both perfect and imperfect channel state information (CSI) for downlink transmission are proposed ...
The proposed MU-MIMO schemes extend the point-to-point single-user precoding to point-to-multipoint multi-user precoding. ...
MU-MIMO DOWNLINK LINEAR PRECODING The detailed steps of several linear precoding schemes of MU-MIMO downlink channel will be introduced in this section. ...
doi:10.1109/iccsit.2010.5564646
fatcat:74xlnjqouzfffgjcrrbg3cncxy
Literature Survey for Transceiver Design in MIMO and OFDM Systems
2018
Journal of Communications
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In order to exploit the benefits of MIMO and OFDM systems, precoding and/or joint precoding and decoding design for MIMO and OFDM systems is of great meaning and has been widely studied. ...
., channel coding, interleaving), spatial diversity (e.g., Multiple-Input Multiple-Output (MIMO) systems), and a combination of multipath and frequency diversity (e.g., Orthogonal Frequency Division Multiplexing ...
precoder and decoder designed for uplink MU-MIMO systems can be easily extended to downlink MU-MIMO systems with both perfect and imperfect CSI. A joint precoder and decoder design for SU-and MU-MIMO ...
doi:10.12720/jcm.13.2.45-59
fatcat:3klhlx46lbdj5fr4q3xtcwv6p4
An Overview of Massive MIMO: Benefits and Challenges
2014
IEEE Journal on Selected Topics in Signal Processing
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Index Terms-Channel estimation, energy efficiency, massive MIMO systems, orthogonal frequency division multiplexing (OFDM), pilot contamination, precoding and detection, single-carrier transmission, spectral ...
We particularly focus on the potential impact of pilot contamination caused by the use of non-orthogonal pilot sequences by users in adjacent cells. ...
Gesbert with EURECOM for valuable comments and suggestions to improve the quality of this article. The authors would also like to thank Mr. Y. Liu with Beijing Jiaotong University for plots. ...
doi:10.1109/jstsp.2014.2317671
fatcat:x3hzg3mmizanlnei4lir6z6m4a
PAR-aware multi-user precoder for the large-scale MIMO-OFDM downlink
2012
2012 International Symposium on Wireless Communication Systems (ISWCS)
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We consider an orthogonal frequency-division multiplexing (OFDM)-based downlink transmission scheme for largescale multi-user (MU) multiple-input multiple-output (MIMO) wireless systems. ...
Numerical results demonstrate tremendous PAR-reduction capabilities of the proposed method, which eventually enables us to use low-cost RF components for the large-scale MU-MIMO-OFDM downlink. ...
PAR-reduction schemes suitable for the MU-MISO and MU-MIMO downlink were described in [8] and [9] , respectively, and rely on Tomlinson-Harashima precoding. ...
doi:10.1109/iswcs.2012.6328479
dblp:conf/iswcs/StuderL12
fatcat:p7yn5owiljbondb47k3t644anu
An optimized hybrid beamforming for millimeter wave musassive MIMO system
2019
3C Tecnología
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The design of combined analog and digital precoding for the mmWave MU-massive MIMO system becomes a non-convex problem. ...
Therefore, we proposed a suboptimal design, where we split the transmitter and receiver hybrid precoding and decoding and adopt orthogonal matching pursuit algorithm for their design. ...
CONCLUSION We have designed a hybrid beamforming scheme for downlink MU-massive MIMO system. ...
doi:10.17993/3ctecno.2019.specialissue.09
fatcat:y4jw7iupfrg4lo42cdrtevubsq
Optimal ZF Precoder for MU massive MIMO Systems over Ricean Channel with per Antenna Power Allocation
2019
EAI Endorsed Transactions on Mobile Communications and Applications
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However, in a typical urban wireless network, the MU massive MIMO channels have both LoS channel and non-paltry scattering channel. ...
In this paper, we primarily concentrate on Ricean channel (combination of LoS and scattering channels) in actualizing efficient beamforming for the MU massive MIMO system. ...
The goal of this work is to analyze the performance of MU massive MIMO downlink system with non-square channel matrix under Ricean channel. ...
doi:10.4108/eai.13-7-2018.156088
fatcat:dqk3wyxpfrcjbmm6airtkdmiaq
Optimal Block Diagonalization precoding scheme for MU-MIMO Downlink channel Using Particle Swarm Optimization
2018
International Journal of Engineering & Technology
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In this regard, this paper presents optimization of Block-Diagonalization (BD) based linear precoding scheme for multi-user multiple-input multiple output (MU-MIMO) systems. ...
Simulation environment consists of a MIMO downlink scenario where a single base station (BS) with antennas transmits to K receivers each with antenna. ...
In this regard, this research work presents optimization of block-diagonalization precoding scheme using PSO for MU-MIMO downlink system. ...
doi:10.14419/ijet.v7i2.17.11565
fatcat:ywblprmcnjfuvlnhtzlhqbxeaa
Improved Precoding Algorithm Design for Downlink Large Scale MU-MIMO System
2020
International Journal of Intelligent Engineering and Systems
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In this paper, we propose an improved design of a precoding algorithm for LS-MU-MIMO communication system. ...
QR decomposition operation again to further enhance the spectral efficiency of a single cell downlink LS-MU-MIMO system. ...
Conclusion We proposed QR-ZF-BD precoding algorithm design for the downlink of a LS-MU-MIMO system where users having multi-antennas. ...
doi:10.22266/ijies2020.0630.14
fatcat:zg5ktxmgbjablanbgmpnlty5sm
Transceiver design using linear precoding in a multiuser multiple-input multiple-output system with limited feedback
2011
IET Communications
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This study makes three contributions: first, the authors provide an end-toend SMSE transceiver design that incorporates receiver combining, feedback policy and transmit precoder design with channel uncertainty ...
The authors design minimises the sum mean squared error (SMSE) while accounting for the imperfections in channel state information (CSI) at the transmitter. ...
Once the quantised channel of the first stream is chosen, the user assumes it to be a non-orthogonal channel for the second stream's vector downlink channel. ...
doi:10.1049/iet-com.2010.0015
fatcat:fdb6u33ts5fkzk2fsbgnv53nze
PAR-Aware Large-Scale Multi-User MIMO-OFDM Downlink
2013
IEEE Journal on Selected Areas in Communications
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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. ...
The significantly reduced linearity requirements eventually enable the use of low-cost RF components for the large-scale MU-MIMO-OFDM downlink. ...
Sankaranarayanan for inspiring discussions. We also thank the anonymous reviewers for their valuable comments, which helped to improve the exposition of our results. ...
doi:10.1109/jsac.2013.130217
fatcat:k27s5qdanzcqfj4vbrbkkpq7fu
Downlink MIMO in LTE-advanced: SU-MIMO vs. MU-MIMO
2012
IEEE Communications Magazine
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of a non-transparent MU-MIMO design in a real-life network. ...
This includes: Rank indicator (RI): number of layers recommended for SU-MIMO transmission Precoding matrix indicator (PMI): index of the recommended SU-MIMO precoding matrix in the feedback/precoding codebook ...
doi:10.1109/mcom.2012.6146493
fatcat:usr5mjxzerg6xo25oqauxhyriu
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