Journal ArticleDOI
Massive MIMO: survey and future research topics
Daniel C. Araujo,Taras Maksymyuk,Andre L. F. de Almeida,Tarcisio F. Maciel,Joao C. M. Mota,Minho Jo +5 more
TLDR
This paper presents an overview of the basic concepts of massive multiple-input multiple-output, with a focus on the challenges and opportunities, based on contemporary research.Abstract:
Massive multiple-input multiple-output technology has been considered a breakthrough in wireless communication systems It consists of equipping a base station with a large number of antennas to serve many active users in the same time-frequency block Among its underlying advantages is the possibility to focus transmitted signal energy into very short-range areas, which will provide huge improvements in terms of system capacity However, while this new concept renders many interesting benefits, it brings up new challenges that have called the attention of both industry and academia: channel state information acquisition, channel feedback, instantaneous reciprocity, statistical reciprocity, architectures, and hardware impairments, just to mention a few This paper presents an overview of the basic concepts of massive multiple-input multiple-output, with a focus on the challenges and opportunities, based on contemporary researchread more
Citations
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Journal ArticleDOI
A Survey on Hybrid Beamforming Techniques in 5G: Architecture and System Model Perspectives
Irfan Ahmed,Hedi Khammari,Adnan Shahid,Ahmed Musa,Kwang Soon Kim,Eli De Poorter,Ingrid Moerman +6 more
TL;DR: The suitability of hybrid beamforming methods, both, existing and proposed till first quarter of 2017, are explored, and the exciting future challenges in this domain are identified.
Journal Article
Massive MIMO for Maximal Spectral Efficiency: How Many Users and Pilots Should Be Allocated?
TL;DR: In this article, the optimal number of scheduled users in a massive MIMO system with arbitrary pilot reuse and random user locations is analyzed in a closed form, while simulations are used to show what happens at finite $M$, in different interference scenarios, with different pilot reuse factors, and for different processing schemes.
Journal ArticleDOI
A Comprehensive Survey on Millimeter Wave Communications for Fifth-Generation Wireless Networks: Feasibility and Challenges
TL;DR: This survey provides a comprehensive overview of several emerging technologies for 5G systems, such as massive multiple-input multiple-output (MIMO) technologies, multiple access technologies, hybrid analog-digital precoding and combining, non-orthogonal multiple access (NOMA), cell-free massive MIMO, and simultaneous wireless information and power transfer (SWIPT) technologies.
Journal ArticleDOI
A Comprehensive Survey of RAN Architectures Toward 5G Mobile Communication System
TL;DR: An inclusive and comprehensive survey on various RAN architectures toward 5G, namely cloud-RAN, heterogeneous cloud-rAN, virtualized cloud- RAN, and fog-Ran, and compares them from various perspectives, such as energy consumption, operations expenditure, resource allocation, spectrum efficiency, system architecture, and network performance.
Journal ArticleDOI
Dynamic Spectrum Sharing in 5G Wireless Networks With Full-Duplex Technology: Recent Advances and Research Challenges
Shree Krishna Sharma,Tadilo Endeshaw Bogale,Long Bao Le,Symeon Chatzinotas,Xianbin Wang,Bjorn Ottersten +5 more
TL;DR: A novel communication framework to enable CST in DSS systems by employing a power control-based SI mitigation scheme is proposed and a throughput performance analysis of this proposed framework is carried out.
References
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Compressed sensing
TL;DR: It is possible to design n=O(Nlog(m)) nonadaptive measurements allowing reconstruction with accuracy comparable to that attainable with direct knowledge of the N most important coefficients, and a good approximation to those N important coefficients is extracted from the n measurements by solving a linear program-Basis Pursuit in signal processing.
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Noncooperative Cellular Wireless with Unlimited Numbers of Base Station Antennas
TL;DR: A cellular base station serves a multiplicity of single-antenna terminals over the same time-frequency interval and a complete multi-cellular analysis yields a number of mathematically exact conclusions and points to a desirable direction towards which cellular wireless could evolve.
Journal ArticleDOI
Massive MIMO for next generation wireless systems
TL;DR: While massive MIMO renders many traditional research problems irrelevant, it uncovers entirely new problems that urgently need attention: the challenge of making many low-cost low-precision components that work effectively together, acquisition and synchronization for newly joined terminals, the exploitation of extra degrees of freedom provided by the excess of service antennas, reducing internal power consumption to achieve total energy efficiency reductions, and finding new deployment scenarios.
Journal ArticleDOI
Scaling Up MIMO: Opportunities and Challenges with Very Large Arrays
Fredrik Rusek,Daniel Persson,Buon Kiong Lau,Erik G. Larsson,Thomas L. Marzetta,Fredrik Tufvesson +5 more
TL;DR: The gains in multiuser systems are even more impressive, because such systems offer the possibility to transmit simultaneously to several users and the flexibility to select what users to schedule for reception at any given point in time.
Journal ArticleDOI
Scaling up MIMO: Opportunities and Challenges with Very Large Arrays
Fredrik Rusek,Daniel Persson,Buon Kiong Lau,Erik G. Larsson,Thomas L. Marzetta,Ove Edfors,Fredrik Tufvesson +6 more
TL;DR: Very large MIMO as mentioned in this paper is a new research field both in communication theory, propagation, and electronics and represents a paradigm shift in the way of thinking both with regards to theory, systems and implementation.