scholarly journals On the integration of reconfigurable intelligent surfaces in real-world environments

2021 ◽  
Author(s):  
Ana Díaz-Rubio ◽  
Sergei Tretyakov
Keyword(s):  
Plane Wave ◽  
Real World ◽  
Finite Size ◽  
Physical Optics ◽  
Next Generation ◽  
Reflection And Transmission ◽  
Communications Systems ◽  
Physical Optics Approximation ◽  
Directive Antennas ◽  
Uniform Plane

<div>The use of reconfigurable intelligent surfaces (RISs) for optimization of propagation channels is one of the most promising and revolutionizing techniques for improving the efficiency of the next generation of communications systems. In this work, we combine the physical optics approximation and the theory of diffraction gratings to study the scattering properties of finite-size metasurfaces mounted on partially reflecting walls and illuminated by directive antennas. We consider both reflective and refractive metasurfaces designed to control both reflection and transmission of waves. We start the analysis under the assumption of uniform, plane-wave illumination, and then discuss non-uniform illuminations by directive antennas.</div>

scholarly journals On the integration of reconfigurable intelligent surfaces in real-world environments

2021 ◽  
Author(s):  
Ana Díaz-Rubio ◽  
Sergei Tretyakov
Keyword(s):  
Plane Wave ◽  
Real World ◽  
Finite Size ◽  
Physical Optics ◽  
Next Generation ◽  
Reflection And Transmission ◽  
Communications Systems ◽  
Physical Optics Approximation ◽  
Directive Antennas ◽  
Uniform Plane

<div>The use of reconfigurable intelligent surfaces (RISs) for optimization of propagation channels is one of the most promising and revolutionizing techniques for improving the efficiency of the next generation of communications systems. In this work, we combine the physical optics approximation and the theory of diffraction gratings to study the scattering properties of finite-size metasurfaces mounted on partially reflecting walls and illuminated by directive antennas. We consider both reflective and refractive metasurfaces designed to control both reflection and transmission of waves. We start the analysis under the assumption of uniform, plane-wave illumination, and then discuss non-uniform illuminations by directive antennas.</div>

scholarly journals Useful Solutions for Plane Wave Diffraction by Dielectric Slabs and Wedges

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Gianluca Gennarelli ◽  
Giovanni Riccio
Keyword(s):  
Plane Wave ◽  
Wave Diffraction ◽  
Transition Function ◽  
Physical Optics ◽  
Surface Currents ◽  
Geometrical Theory ◽  
Numerical Tests ◽  
Physical Optics Approximation ◽  
Geometrical Theory Of Diffraction ◽  
Plane Wave Diffraction

This work presents an overview of available uniform asymptotic physical optics solutions for evaluating the plane wave diffraction by some canonical geometries of large interest: dielectric slabs and wedges. Such solutions are based on a physical optics approximation of the electric and magnetic equivalent surface currents in the involved scattering integrals. The resulting diffraction coefficients are expressed in terms of the geometrical optics response of the considered structure and the standard transition function of the Uniform Geometrical Theory of Diffraction. Numerical tests and comparisons make evident the effectiveness and reliability of the presented solutions.

Big Data Processing and Mining for Next Generation Intelligent Transportation Systems

2013 ◽  
Vol 63 (3) ◽  
Author(s):  
Jelena Fiosina ◽  
Maxims Fiosins, Jörg P. Müller
Keyword(s):  
Big Data ◽  
Data Processing ◽  
Real World ◽  
Intelligent Transportation Systems ◽  
Social Impact ◽  
Intelligent Transportation ◽  
Transportation Systems ◽  
Optimization Techniques ◽  
Next Generation ◽  
Big Data Processing

The deployment of future Internet and communication technologies (ICT) provide intelligent transportation systems (ITS) with huge volumes of real-time data (Big Data) that need to be managed, communicated, interpreted, aggregated and analysed. These technologies considerably enhance the effectiveness and user friendliness of ITS, providing considerable economic and social impact. Real-world application scenarios are needed to derive requirements for software architecture and novel features of ITS in the context of the Internet of Things (IoT) and cloud technologies. In this study, we contend that future service- and cloud-based ITS can largely benefit from sophisticated data processing capabilities. Therefore, new Big Data processing and mining (BDPM) as well as optimization techniques need to be developed and applied to support decision-making capabilities. This study presents real-world scenarios of ITS applications, and demonstrates the need for next-generation Big Data analysis and optimization strategies. Decentralised cooperative BDPM methods are reviewed and their effectiveness is evaluated using real-world data models of the city of Hannover, Germany. We point out and discuss future work directions and opportunities in the area of the development of BDPM methods in ITS.

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