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Interference-Aware Flexible TDD Design for Massive MIMO 5G Systems
[article]
2018
arXiv
pre-print
Preserved Fulltext
In this paper, a practical novel TDD design principle is proposed for massive multiple-input multiple-output (MIMO) heterogeneous networks (HetNets) that leverages the inherent features of a flexible TDD ...
The design is based on the key observation that the transmission path chosen for training by the non-massive MIMO base stations plays an important role in the interference behavior of the network, and ...
for massive MIMO systems [7] . ...
arXiv:1803.03431v1
fatcat:ibebk6mzuvd4lgr4zg3z26z4em
Experimental Evaluations of TDD based Massive MIMO Deployment for Mobile Network Operators
2020
IEEE Access
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The paper in [30] have considered performance of two different scenarios for pilot signals allocation in TDD multicell massive MIMO systems. ...
Hence, massive MIMO is a significant enabler for deployment of Gigabit LTE and 5G systems for MNOs. ...
doi:10.1109/access.2020.2974277
fatcat:7f53zd6uuvcjvgokmfxtzsunr4
Subcarrier-Interlaced FDD for Faster-than-TDD Channel Tracking in Massive MIMO Systems
[article]
2018
arXiv
pre-print
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We extend the idea of exploiting reciprocity to the coherence bandwidth, allocating subcarriers of a multicarrier (OFDM)-based system in an interlaced fashion to up- and downlink, respectively, referred ...
Canonical Massive MIMO uses time division duplex (TDD) to exploit channel reciprocity within the coherence time, avoiding feedback of channel state information (CSI), as is required for precoding at the ...
In this paper, we study a specific variant of "FDD" operation in the massive MIMO context, using the same amount of pilot overhead as in canonical massive MIMO systems. ...
arXiv:1804.05886v1
fatcat:mhfojp4w5bffpc7wjzsbxob72e
Research Challenges and Opportunities in 5G Network
2017
International Journal of Future Generation Communication and Networking
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In this paper we present several emerging technologies that support 5G standard along with research problems and challenges for 5G systems. ...
The term 5G is sometimes used to encapsulate all existing technologies for all time availability, higher coverage area and higher network density with respect to cell and devices.5G system will be compatible ...
., proposed a system model for Massive MIMO system to calculate channel estimation, pilot contamination, path loss and antenna correlation, also proposed an architecture and precoding scheme that will ...
doi:10.14257/ijfgcn.2017.10.6.02
fatcat:34jaalutwvggxausg2t6d4toom
Ubiquitous Cell-Free Massive MIMO Communications
[article]
2019
arXiv
pre-print
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Massive MIMO (multiple-input multiple-output) is a key 5G technology that uses massive antenna arrays to provide a very high beamforming gain and spatially multiplexing of users, and hence, increases the ...
Conversely, ubiquitous cell-free Massive MIMO [3] refers to a distributed Massive MIMO system implementing coherent user-centric transmission to overcome the inter-cell interference limitation in cellular ...
The TDD frame with no pilot-based DL training (right) is used in cellular Massive MIMO, which can rely on channel hardening, while both options are on the table for cell-free Massive MIMO. ...
arXiv:1804.03421v3
fatcat:3kfuwv7yl5h2thbugdldkzpg5q
An overview of transmission theory and techniques of large-scaleantenna systems for 5G wireless communications
2016
Scientia Sinica Informationis
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, and resource allocation. ...
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 ...
For CSI acquisition in massive MIMO systems, there are more challenges in FDD than in TDD. ...
doi:10.1360/n112015-00296
fatcat:mlrpynfxdfgabdzv54qjgqv3wm
Harvest the potential of massive MIMO with multi-layer techniques
2016
IEEE Network
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2016 pre-print arXiv:1601.04217v1 fatcat:7vtmy7w7wnhspk4lray3austeyOther Versions
Massive MIMO is envisioned as a promising technology for 5G wireless networks due to its high potential to improve both spectral and energy efficiency. ...
In this article, we begin with an analysis of the benefits and challenges of massive MIMO systems. ...
In [15] , a cooperative network MIMO system was considered and compared with a massive MIMO system. ...
doi:10.1109/mnet.2016.7579025
fatcat:w6fmhw54qzgufa6qiflwow5oba
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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, and resource allocation. ...
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 ...
For CSI acquisition in massive MIMO systems, there are more challenges in FDD than in TDD [43, 44] . ...
doi:10.1007/s11432-016-0278-5
fatcat:ixe5qfgsafeczd6d5nk2shh3mq
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. ...
We have also studied performance improvement in presence of pilot using MMSE receiver. Further improvement is achieved in this work by introducing precoding technique for massive MIMO systems. ...
The rest of this paper is organized as follows: in section 2, we give a potential of massive MIMO system and Drawback of massive MIMO system. Section 3 describes TDD and FDD schemes. ...
doi:10.21917/ijct.2017.0228
fatcat:7hbhnaa7ebhatj65utfme4ej7q
Utility-based Downlink Pilot Assignment in Cell-Free Massive MIMO
2019
Zenodo
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We propose a strategy for orthogonal downlink pilot assignment in cell-free massive MIMO (multiple-input multipleoutput) that exploits knowledge of the channel state information, the channel hardening ...
These elements, properly combined together, are used to define an user pilot utility metric, which measures the user's real need of a downlink pilot for efficient data decoding. ...
SYSTEM MODEL We consider a TDD cell-free massive MIMO system with M single-antenna APs and K single-antenna UEs, M > K. ...
doi:10.5281/zenodo.2550561
fatcat:ch3gssnvhvgtvlpj2alkjuykfi
Surveying on MIMO Technology for Future Wireless Communication
2021
International journal of recent technology and engineering
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Using massive MIMO technique also increases reliability of the links, reduces noise effects, and mitigates and interference. ...
Massive MIMO is an extension of traditional MIMO with the exception that the BSs in massive MIMO are equipped with large number of antennas, usually hundred or more. ...
Due to dynamic behavior of the learning algorithms, they can be very much helpful in optimizing highly complex and high power-consuming massive MIMO system. ...
doi:10.35940/ijrte.d6525.1110421
fatcat:ishagldm6naivf2ygzvdodj7ny
Ubiquitous cell-free Massive MIMO communications
2019
EURASIP Journal on Wireless Communications and Networking
Preserved Fulltext
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The file type is application/pdf.
Massive MIMO (multiple-input multiple-output) is a key 5G technology that uses massive antenna arrays to provide a very high beamforming gain and spatially multiplexing of users and hence increases the ...
Conversely, ubiquitous cell-free Massive MIMO refers to a distributed Massive MIMO system implementing coherent user-centric transmission to overcome the inter-cell interference limitation in cellular ...
TDD protocol The TDD protocol recommended for cell-free Massive MIMO is illustrated in Fig. 4 . Each AP estimates the UL channel from each UE by measurements on UL pilots. ...
doi:10.1186/s13638-019-1507-0
fatcat:eguwav4tyjdihdldoht3kpa36u
Utility-based Downlink Pilot Assignment in Cell-Free Massive MIMO
[article]
2018
arXiv
pre-print
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
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Other Versions
We propose a strategy for orthogonal downlink pilot assignment in cell-free massive MIMO (multiple-input multiple-output) that exploits knowledge of the channel state information, the channel hardening ...
These elements, properly combined together, are used to define a user pilot utility metric, which measures the user's real need of a downlink pilot for efficient data decoding. ...
SYSTEM MODEL We consider a TDD cell-free massive MIMO system with M single-antenna APs and K single-antenna UEs, M > K. ...
arXiv:1803.08828v2
fatcat:pm7vcnodcvh2nat3qfxow4kx7y
Utility-Based Downlink Pilot Assignment In Cell-Free Massive Mimo
2018
Zenodo
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
We propose a strategy for orthogonal downlink pilot assignment in cell-free massive MIMO (multiple-input multiple-output) that exploits knowledge of the channel state information, the channel hardening ...
These elements, properly combined together, are used to define a user pilot utility metric, which measures the user's real need of a downlink pilot for efficient data decoding. ...
SYSTEM MODEL We consider a TDD cell-free massive MIMO system with M single-antenna APs and K single-antenna UEs, M > K. ...
doi:10.5281/zenodo.1216948
fatcat:rwc22vsfnje2vdmiwayrduicm4
Cell-Free Massive MIMO for 6G Wireless Communication Networks
[article]
2021
arXiv
pre-print
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2021 pre-print arXiv:2110.07309v1 fatcat:shcu7kxtofh73fdlewyrmbcxum
We focus on enabling physical layer technologies for cell-free massive MIMO, such as user association, pilot assignment, transmitter and receiver design, as well as power control and allocation. ...
Among the candidate technologies for such systems, cell-free massive MIMO which combines the advantages of distributed systems and massive MIMO is considered as a key solution to enhance the wireless transmission ...
Power Control and Allocation For cell-free massive MIMO systems, one of the significant challenges is power control and allocation. ...
arXiv:2110.07309v2
fatcat:5ca7tt6fzver7ecxkeyuv2h2ba
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