Reference : On the Spectral and Energy Efficiencies of Full-Duplex Cell-Free Massive MIMO
Scientific journals : Article
Engineering, computing & technology : Electrical & electronics engineering
Security, Reliability and Trust
http://hdl.handle.net/10993/42817
On the Spectral and Energy Efficiencies of Full-Duplex Cell-Free Massive MIMO
English
Nguyen, Hieu V. mailto []
Nguyen, van Dinh mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
Dobre, Octavia A. mailto []
Sharma, Shree Krishna [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)]
Chatzinotas, Symeon mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
Ottersten, Björn mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
Shin, Oh-Soon []
In press
IEEE Journal on Selected Areas in Communications
Institute of Electrical and Electronics Engineers
Multiple Antenna Technologies for Beyond 5G
Yes
International
USA
[en] Cell-free massive multiple-input multiple output ; energy efficiency ; full-duplex radio ; inner approximation ; spectral efficiency ; successive interference cancellation
[en] In-band full-duplex (FD) operation is practically more suited for short-range communications such as WiFi and small-cell networks, due to its current practical limitations on the self-interference cancellation. In addition, cell-free massivemultiple-input multiple-output (CF-mMIMO) is a new and scalable version of MIMO networks, which is designed to bring service antennas closer to end user equipments (UEs). To achieve higher spectral and energy efficiencies (SE-EE) of a wireless network, it is of practical interest to incorporate FD capability into CF-mMIMO systems to utilize their combined benefits. We formulate a novel and comprehensive optimization problem
for the maximization of SE and EE in which power control, access point-UE (AP-UE) association and AP selection are jointly optimized under a realistic power consumption model, resulting in a difficult class of mixed-integer nonconvex programming. To tackle the binary nature of the formulated problem, we propose an efficient approach by exploiting a strong coupling between binary and continuous variables, leading to a more tractable problem. In this regard, two low-complexity transmission designs based on zero-forcing (ZF) are proposed. Combining tools from inner approximation framework and Dinkelbach method, we develop simple iterative algorithms with polynomial computational complexity in each iteration and strong theoretical performance guaranteed. Furthermore, towards a robust design for FD CFmMIMO, a novel heap-based pilot assignment algorithm is proposed to mitigate effects of pilot contamination. Numerical results show that our proposed designs with realistic parameters significantly outperform the well-known approaches (i.e., smallcell and collocated mMIMO) in terms of the SE and EE. Notably, the proposed ZF designs require much less execution time than the simple maximum ratio transmission/combining.
Interdisciplinary Centre for Security, Reliability and Trust (SnT) – University of Luxembourg
European Research Council; Luxembourg National Research Fund (FNR)
the ERC project AGNOSTIC and FNR ECLECTIC
Researchers ; Professionals ; Students ; General public ; Others
http://hdl.handle.net/10993/42817
H2020 ; 742648 - AGNOSTIC - Actively Enhanced Cognition based Framework for Design of Complex Systems
FnR ; FNR11306457 > Christos Tsinos > ECLECTIC > Energy and Complexity Efficient Millimiter-wave Large-Aray Communications > 01/05/2017 > 30/04/2020 > 2016

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