Enhanced Coverage in the Shadow Region Using Dipole Scatterers at the Corner

Zabihi, Roshanak; Hynes, Christopher G.; Vaughan, Rodney G.

doi:10.1109/tap.2021.3076194

Cited by 4 publications

(2 citation statements)

References 31 publications

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“…These obstacles partially or fully block the direct line of sight between the transmitting and receiving antennas, causing signal attenuation or complete signal loss, as illustrated in Figure 1a. To overcome this challenge, various methods have been employed, such as using signal repeaters [1], distributed antenna systems [2], mesh networks [3], frequency selective surfaces [4,5] and dipole scatterers [6]. More recently, the concept of intelligent reflecting surfaces (IRSs) has emerged as a potential solution to overcome NLOS scenarios utilizing metasurfaces that efficiently reflect incident waves into arbitrary nonspecular angles [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Inkjet printed intelligent reflecting surface for indoor applications

Takimoto,

Nakamura,

Njogu

et al. 2023

Electronics Letters

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A passive, low‐cost, paper‐based intelligent reflecting surface (IRS) is designed to reflect a signal in a desired direction to overcome non‐line‐of‐sight scenarios in indoor environments. The IRS is fabricated using conductive silver ink printed on paper with a specific nanoparticle arrangement, yielding a cost‐effective paper‐based IRS that can easily be mass‐produced. Full‐wave numerical simulation results were consistent with measurement results, demonstrating the IRS's ability to reflect incident waves into a desired nonspecular direction based on the inkjet‐printed design and materials.

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Section: Introductionmentioning

confidence: 99%

Inkjet printed intelligent reflecting surface for indoor applications

Takimoto,

Nakamura,

Njogu

et al. 2023

Electronics Letters

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“…[ 3 ] Another scheme to enhance the coverage of the shadowed corner is the dipole scatters without additional cost. [ 4 ] When it comes to indoor scenarios, complex corridors make the signal coverage even thorny. [ 5 ] By introducing passive or active repeaters of companies with microbase stations at the corners, the L‐shaped, T‐shaped, and X‐shaped corridors can be effectively covered.…”

Section: Introductionmentioning

confidence: 99%

Indoor Non‐Line‐of‐Sight Millimeter‐Wave Coverage Enhancements by Field‐Reorganizable Passive Digital Coding Metasurfaces

Han,

Ma,

et al. 2023

Advanced Photonics Research

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Digital metasurfaces define a novel methodology for metasurface designs by adopting discrete coding meta‐atoms to engineer electromagnetic waves in programmable ways. Herein, a novel field‐reorganizable digital metasurface (FRDM) that can be used to enhance the indoor non‐line‐of‐sight (NLOS) millimeter‐wave (mmWave) signal coverage is presented. The passive binary supercells which can be reorganized with an in situ optimization characteristic to deflect the incoming mmWaves into the blind area with adjustable angles are proposed. The indoor L‐shaped corridor signal coverage simulated by the ray‐tracing technique confirms that the NLOS blind area is effectively communicated using the passive FRDM. Practical environment experiments using FRDMs with different coding sequences are conducted, indicating that the averaged signal intensity is increased by over 10 dB in the NLOS blind area in a wide operating frequency band from 26 to 30 GHz by reorganizing the passive digital metasurfaces. The results suggest that the proposed FRDM enabled by the reorganizable binary supercells is a highly flexible, low‐cost, and extensible solution for B5G and 6G mmWave wireless communications.

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Reconfigurable Intelligent Edges: Illuminating the Shadow Region in Wireless Networks

Cotton¹,

Abbasi²,

Machado³

et al. 2022

IEEE Access

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This paper proposes a new wireless enabling technology for future smart radio environments. The approach aims to enhance signal coverage within the shadow region(s) of wireless networks with the aid of so-called 'intelligent edges (IEs)'. IEs may be installed at the fringes of shadowing objects such as buildings, walls and other obstacles which obscure the optical signal path from a transmitter to receiver. We investigate two different approaches to illuminating the shadow region in wireless networks using IEs which exploit refraction or diffraction, operating in passive or active mode. The operation of IE-assisted communications are investigated, in particular the ways they can redirect electromagnetic energy towards regions with little or no wireless network coverage. Following from this, a number of variations of IEs are tested in real-world scenarios which consider illuminating the shadow region behind high-rise buildings, first in a city center, and then along a shoreline. Refractive IEs in particular, are shown to provide significant gains compared to the case when no IEs are involved, enhancing signal reception in the shadow region at street level behind a high rise building by as much as 12 dB. Critically, it is shown that intelligent edges offer a low complexity and cost-effective solution for improving connectivity in shadowing-limited environments.

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Enhanced Coverage in the Shadow Region Using Dipole Scatterers at the Corner

Cited by 4 publications

References 31 publications

Inkjet printed intelligent reflecting surface for indoor applications

Inkjet printed intelligent reflecting surface for indoor applications

Indoor Non‐Line‐of‐Sight Millimeter‐Wave Coverage Enhancements by Field‐Reorganizable Passive Digital Coding Metasurfaces

Reconfigurable Intelligent Edges: Illuminating the Shadow Region in Wireless Networks

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