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RIS-Assisted Coverage Enhancement in Millimeter-Wave Cellular Networks

Nemati, Mahyar, Park, Jihong and Choi, Jinho 2020, RIS-Assisted Coverage Enhancement in Millimeter-Wave Cellular Networks, IEEE Access, vol. 8, pp. 188171-188185, doi: 10.1109/ACCESS.2020.3031392.

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Title RIS-Assisted Coverage Enhancement in Millimeter-Wave Cellular Networks
Author(s) Nemati, Mahyar
Park, JihongORCID iD for Park, Jihong orcid.org/0000-0001-7623-6552
Choi, JinhoORCID iD for Choi, Jinho orcid.org/0000-0002-4895-6680
Journal name IEEE Access
Volume number 8
Start page 188171
End page 188185
Total pages 15
Publisher IEEE
Place of publication Piscataway, N.J.
Publication date 2020-10-15
ISSN 2169-3536
2169-3536
Keyword(s) Science & Technology
Technology
Computer Science, Information Systems
Engineering, Electrical & Electronic
Telecommunications
Computer Science
Engineering
Cellular networks
Antenna arrays
Millimeter wave communication
Geometry
Stochastic processes
MIMO communication
Array signal processing
Millimeter-wave (mmWave)
reconfigurable intelligent surface (RIS)
coverage
signal-to-interference ratio (SIR)
stochastic geometry
PERFORMANCE
DESIGN
CHANNEL
Summary The use of millimeter-wave (mmWave) bandwidth is one key enabler to achieve the high data rates in the fifth-generation (5G) cellular systems. However, mmWave signals suffer from significant path loss due to high directivity and sensitivity to blockages, limiting its adoption within small-scale deployments. To enhance the coverage of mmWave communication in 5G and beyond, it is promising to deploy a large number of reconfigurable intelligent surfaces (RISs) that passively reflect mmWave signals towards desired directions. With this motivation, in this work, we study the coverage of an RIS-assisted large-scale mmWave cellular network using stochastic geometry, and derive the peak reflection power expression of an RIS and the downlink signal-to-interference ratio (SIR) coverage expression in closed forms. These analytic results clarify the effectiveness of deploying RISs in the mmWave SIR coverage enhancement, while unveiling the major role of the density ratio between active base stations (BSs) and passive RISs. Furthermore, the results show that deploying passive reflectors are as effective as equipping BSs with more active antennas in the mmWave coverage enhancement. Simulation results confirm the tightness of the closed-form expressions, corroborating our major findings based on the derived expressions.
Language eng
DOI 10.1109/ACCESS.2020.3031392
Indigenous content off
Field of Research 08 Information and Computing Sciences
09 Engineering
10 Technology
HERDC Research category C1 Refereed article in a scholarly journal
Free to Read? Yes
Use Rights Creative Commons Attribution licence
Persistent URL http://hdl.handle.net/10536/DRO/DU:30146391

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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.