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MAX-SLNR Precoding Algorithm for Massive MIMO System
2016
MATEC Web of Conferences
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Pilot Contamination obviously degrades the system performance of Massive MIMO systems. ...
Massive MIMO precoding algorithm. ...
System Model In this paper, we consider uplink training and transmit precoding in a multi-cell scenario with I cells in the Massive MIMO TDD system where each cell consists of a base station with t N antennas ...
doi:10.1051/matecconf/20165605005
fatcat:2og75jbfnnajxniee4h6v6nb3q
ON PILOT CONTAMINATION IN MASSIVE MULTIPLE-INPUT MULTIPLE OUTPUT SYSTEM WITH LEAST SQUARE METHOD AND ZERO FORCING RECEIVER
2017
ICTACT Journal on Communication Technology
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In this paper, we present a comprehensive overview of massive MIMO system and studied degradation in performance due to pilot contamination. ...
Further improvement is achieved in this work by introducing precoding technique for massive MIMO systems. ...
METHODS FOR MITIGATION OF PILOT CONTAMINATION In this section, we review existing methods proposed to eliminate the effects of pilot contamination in multi-cell TDD system. ...
doi:10.21917/ijct.2017.0228
fatcat:7hbhnaa7ebhatj65utfme4ej7q
Linear precoder optimization of spectral efficiency of time division duplex hyper MIMO system with pilot contamination
2023
Indonesian Journal of Electrical Engineering and Computer Science
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The aim is to optimize spectral efficiency of several users hyper MIMO system during Uplink communication in a multi-cell contaminated pilot environment, using a new type of precoders called single cell-minimum ...
Our work is developed in context of studing Massive MIMO in a 5G context. ...
INTRODUCTION Massive MIMO systems or high integration scale antenna systems or multi-user Massive MIMO represent a new research direction in microwave data transmission [1] . ...
doi:10.11591/ijeecs.v29.i3.pp1520-1528
fatcat:giesn3yzkrbsjmc2ssgqnxvy5q
LS-Based Pilot Contamination Pre-coding for Large-scale MIMO System
2014
International Journal of Future Generation Communication and Networking
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To reduce pilot contamination, a downlink precoding algorithm was put forward for Large-scale MIMO system. ...
Based on simulation results, it was shown that the proposed algorithm can achieve better performance than popular Large-scale MIMO precoding algorithms, e.g. single-cell Zero-Forcing precoding and multi-cell ...
Uplink System Model of Massive MIMO
the noise. ...
doi:10.14257/ijfgcn.2014.7.4.05
fatcat:ehkk5syrwzak3ebhychzewihxi
An Overview of Massive MIMO Technology Components in METIS
2017
IEEE Communications Magazine
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state information for sparse channels in frequency division duplexing systems, managing user grouping and multi-user beamforming, and a decentralized coordinated transceiver design. ...
Indeed, in its final deliverable, the European 5G project Mobile and Wireless Communication Enablers for the 2020 Information Society (METIS) identifies massive MIMO as a key 5G enabler and proposes specific ...
Low Rate Multi-cell coordination for pilot contamination mitigation in TDD systems Understanding and managing the inherent trade-offs related to CSI acquisition in massive MIMO systems is fundamental to ...
doi:10.1109/mcom.2017.1600802
fatcat:5rq2s6repzauznp2lgui2ezizi
An Overview of Massive MIMO: Benefits and Challenges
2014
IEEE Journal on Selected Topics in Signal Processing
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We particularly focus on the potential impact of pilot contamination caused by the use of non-orthogonal pilot sequences by users in adjacent cells. ...
Index Terms-Channel estimation, energy efficiency, massive MIMO systems, orthogonal frequency division multiplexing (OFDM), pilot contamination, precoding and detection, single-carrier transmission, spectral ...
Multi-Cell Precoding Linear precoders can also be used in multi-cell massive MIMO systems, where cooperating BSs are designed to jointly serve users in different cells [37] . ...
doi:10.1109/jstsp.2014.2317671
fatcat:x3hzg3mmizanlnei4lir6z6m4a
Pilot Contamination Elimination for Channel Estimation with Complete Knowledge of Large-Scale Fading in Downlink Massive MIMO Systems
[article]
2021
arXiv
pre-print
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However, massive massive multiple input multiple output systems are still limited because of pilot contamination, impacting the data rate due to the non-orthogonality of pilot sequences transmitted by ...
users in the same cell to the neighboring cells. ...
In multi-cell massive MIMO systems, PC is a fundamental problem, which impacts the DR. ...
arXiv:2106.13507v1
fatcat:ln22glps5ne6xfp3sq6c6irz3q
A pilot allocation method for multi-cell multi-user massive MIMO system
2021
Journal of Systems Engineering and Electronics
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This paper proposes a method based on cell classification and users grouping to mitigate the pilot contamination in multi-cell massive MIMO systems and improve the spectral efficiency. ...
Pilot contamination can spoil the accuracy of channel estimation and then has become one of the key problems influencing the performance of massive multiple input multiple output (MIMO) systems. ...
The influence of pilot contamination on system performance in multi-cell massive MIMO systems was studied in [12, 13] . ...
doi:10.23919/jsee.2021.000033
fatcat:3vu3vujylfbafpfnajlkirzs34
Survey on Massive MIMO: Technology, Challenges, Opportunities and Benefits
2021
Ymer
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The paper then summarizes the technologies that are used in massive MIMO system, including channel estimation, pre-coding, and signal detection. ...
Massive MIMO technologies will utilize simpler and linear algorithms for beam forming and decoding. ...
Pilot Contamination: The user pilots of neighboring cells may not be orthogonal in a multicell massive MIMO system. It is estimated that there are fewer orthogonal pilots than users. ...
doi:10.37896/ymer20.11/25
fatcat:goyiab22f5dbthija57dqjcjlu
Estimation Large- Scale Fading Channels for Transmit Orthogonal Pilot Reuse Sequences in Massive MIMO System
[article]
2022
arXiv
pre-print
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However, because the pilot sequence transmitted by users in a single cell to neighboring cells is not orthogonal, massive MIMO systems are still constrained. ...
Reduced pilot contamination (PC) enhanced system performance, and reduced inter-cell interference and improved channel estimation. ...
In multi-cell massive MIMO systems, pilot contamination (PC) is a essential problem, which influences the Data Rate (DR). ...
arXiv:2212.03288v1
fatcat:q2j4ytjys5f3bbwnktqnps3j4i
A Large-Scale MIMO Precoding Algorithm Based on Iterative Interference Alignment
2014
Cybernetics and Information Technologies
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The performance of Large-scale MIMO system is degraded by Pilot Contamination. ...
The main idea of this algorithm is aligning the pilot contamination and inter-cell interference to the same null space in order to acquire the maximal degrees of freedom. ...
It can achieve the capacity lower bound of PCP which can efficiently eliminate the intercell interference in Large-scale MIMO systems. ...
doi:10.2478/cait-2014-0033
fatcat:45cqa5rznfei5jzmeoiaydvvz4
Analysis and Evaluation of Performance Gains and Tradeoffs for Massive MIMO Systems
2016
Applied Sciences
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effect of interference among cells due to pilot sequences contamination. ...
In this paper, the system performance gains are studied in a multi-cell downlink massive MIMO system under the main considerations such as perfect channel estimation, imperfect channel estimation and the ...
Acknowledgments: This work was supported in part by National High Technology Research and Development Program (2015AA015901). ...
doi:10.3390/app6100268
fatcat:evqc5lgssrcwnhroic6a4evccy
Pilot reuse sequences for TDD in downlink multi-cells to improve data rates
2019
TELKOMNIKA (Telecommunication Computing Electronics and Control)
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In this paper, we propose that system performance can be improved by using perfect channel estimation and reducing effective interference with pilot reuse that mitigate strong pilot contamination based ...
When the number of users is large, the interference between neighboring cells can be suppressed by using orthogonal pilot reuse sequences. ...
Increasing the number of transmit pilot reuse sequences for large-scale fading is able to suppress pilot contamination in multi-cell massive MIMO systems [9] . ...
doi:10.12928/telkomnika.v17i5.12809
fatcat:lvfyp6gsn5b4ngvwt2eq4xphry
An overview of transmission theory and techniques of large-scale antenna systems for 5G wireless communications
2016
Science China Information Sciences
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Other Versions
When a large-scale antenna array (which is also called massive MIMO) is equipped in a base-station, or a large number of distributed antennas (which is also called large-scale distributed MIMO) are deployed ...
This paper provides an overview of massive MIMO and large-scale distributed MIMO systems, including spectral efficiency analysis, channel state information (CSI) acquisition, wireless transmission technology ...
In the ideal case, the estimated PDP approximates to that without pilot contamination. Finally, pilot contamination can be eliminated by the estimated PDP. ...
doi:10.1007/s11432-016-0278-5
fatcat:ixe5qfgsafeczd6d5nk2shh3mq
BER Analysis of Multi-Cellular MIMO Systems with Increasing Number of BS Antennas
[article]
2014
arXiv
pre-print
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Our numerical result findings show that, in the same way as with the sum capacity, the pilot contamination also limits the BER performance of a noncooperative multi-cell MIMO system with infinite number ...
cells, channel estimation errors due to background thermal noise, and pilot contamination, which was recently shown to be the only impairment that remains in the MIMO multicell system with infinite number ...
On the other hand, a precoding technique that eliminates pilot contamination and leads to unlimited gains with N → ∞ is proposed in [15] . ...
arXiv:1406.3753v1
fatcat:n5xmk3ua45a55mfz2jp6cidrze
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