Hybrid Computational Techniques: Electromagnetic Propagation Analysis in Complex Indoor Environments

In this article, we compare deterministic methodologies for characterizing channel behavior in heterogeneous and composite scenarios. These techniques include one that combines a 3D ray launching (RL) approach based on geometrical optics (GO), a second based on GO and the uniform theory of diffraction (UTD), and another that includes a diffusion equation (DE) method based on the equation of transfer. A new methodology based on the GO and DE is presented and shown to achieve accurate results when compared with real measurements. The proposed technique provides a computational time reduction of up to 90% compared to the conventional approach using GO with the UTD and DE.

[1]  Joseph B. Keller,et al.  Diffraction of a convex cylinder , 1956 .

[2]  A Wave-Equation-Based Spatial Finite-Difference Method for Electromagnetic Time-Domain Modeling , 2018, IEEE Antennas and Wireless Propagation Letters.

[3]  Indoor signal focusing by means of Fresnel zone plate lens attached to building wall , 2004, IEEE Transactions on Antennas and Propagation.

[4]  O. R. Spivack,et al.  Wave Propagation and Scattering - 12 lectures , 2012 .

[5]  P. Vainikainen,et al.  Analysis of Multipath Propagation in Urban Environment Through Multidimensional Measurements and Advanced Ray Tracing Simulation , 2008, IEEE Transactions on Antennas and Propagation.

[6]  I. P. Shkarofsky,et al.  Computer modeling of multipath propagation: Review of ray‐tracing techniques , 1982 .

[7]  A relation between the Sommerfeld theory of radio propagation over a flat earth and the theory of diffraction at a straight edge , 1950 .

[8]  Jiunn-Ming Huang,et al.  A new and efficient hybrid model for estimating space diversity in indoor environment , 2000, IEEE Trans. Veh. Technol..

[9]  J. Boersma,et al.  Three-dimensional half-plane diffraction: Exact solution and testing of uniform theories , 1984 .

[10]  Enrico M. Vitucci,et al.  A Semideterministic Model for Outdoor-to-Indoor Prediction in Urban Areas , 2017, IEEE Antennas and Wireless Propagation Letters.

[11]  Francisco Falcone,et al.  Optimized Wireless Channel Characterization in Large Complex Environments by Hybrid Ray Launching-Collaborative Filtering Approach , 2017, IEEE Antennas and Wireless Propagation Letters.

[12]  S. Seidel,et al.  Path loss and multipath delay statistics in four European cities for 900 MHz cellular and microcellular communications , 1990 .

[13]  S. Yoshida,et al.  Theoretical prediction of mean field strength for urban mobile radio , 1991 .

[14]  Francisco Falcone,et al.  Influence of meshing adaption in convergence performance of deterministic ray launching estimation in indoor scenarios , 2017 .

[15]  Friedrich M. Landstorfer,et al.  Deterministic Propagation Model for the Planning of Hybrid Urban and Indoor Scenarios , 2005, 2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications.

[16]  A. J. Levy,et al.  Theory and measurement of the angle of arrival and time delay of UHF radiowaves using a ring array , 1997 .

[17]  Hassan M. El-Sallabi,et al.  Influence of diffraction coefficient and corner shape on ray prediction of power and delay spread in urban microcells , 2002 .

[18]  A generalized uniform geometrical theory of diffraction ray solution for the diffraction by a wedge with convex faces , 1996 .

[19]  Mohsen Kavehrad,et al.  Combined Deterministic and Modified Monte Carlo Method for Calculating Impulse Responses of Indoor Optical Wireless Channels , 2014, Journal of Lightwave Technology.

[20]  Seong-Jun Oh,et al.  Geometric Optics-Based Propagation Prediction Model in Urban Street Canyon Environments , 2016, IEEE Antennas and Wireless Propagation Letters.

[21]  Alberto Córdoba,et al.  SesToCross: Semantic Expert System to Manage Single-Lane Road Crossing , 2017, IEEE Transactions on Intelligent Transportation Systems.

[22]  Yoann Corre,et al.  Three-Dimensional Urban EM Wave Propagation Model for Radio Network Planning and Optimization Over Large Areas , 2009, IEEE Transactions on Vehicular Technology.

[23]  Iván González Diego,et al.  Propagation model based on ray tracing for the design of personal communication systems in indoor environments , 2000, IEEE Trans. Veh. Technol..

[24]  Francisco Falcone,et al.  Evaluation of Deployment Challenges of Wireless Sensor Networks at Signalized Intersections , 2016, Sensors.

[25]  J. Keller,et al.  Reflection and Transmission by a Random Medium , 1969 .

[26]  Xiongwen Zhao,et al.  Empirical characterization of wideband indoor radio channel at 5.3 GHz , 2001 .

[27]  Theodore S. Rappaport,et al.  Measurements and models for radio path loss and penetration loss in and around homes and trees at 5.85 GHz , 1998, IEEE Trans. Commun..

[28]  Raymond J. Luebbers.  Comparison of lossy wedge diffraction coefficients with application to mixed path propagation loss prediction , 1988 .

[29]  On the Diffusion of Electromagnetic Waves and Applicability of Diffusion Equation to Multipath Random Media , 2008, IEEE Transactions on Antennas and Propagation.

[30]  C. Oestges,et al.  Polarimetric Properties of Diffuse Scattering From Building Walls: Experimental Parameterization of a Ray-Tracing Model , 2012, IEEE Transactions on Antennas and Propagation.

[31]  Philip Constantinou,et al.  A propagation prediction tool for urban mobile radio systems , 2000, IEEE Trans. Veh. Technol..

[32]  R. Janaswamy.  An Indoor Pathloss Model at 60 GHz Based on Transport Theory , 2006, IEEE Antennas and Wireless Propagation Letters.

[33]  Francisco Falcone,et al.  A Hybrid Ray Launching-Diffusion Equation Approach for Propagation Prediction in Complex Indoor Environments , 2017, IEEE Antennas and Wireless Propagation Letters.

[34]  Francisco Falcone,et al.  Optimization and Design of Wireless Systems for the Implementation of Context Aware Scenarios in Railway Passenger Vehicles , 2017, IEEE Transactions on Intelligent Transportation Systems.

[35]  J. D. Parsons,et al.  Mobile radio propagation in British cities at frequencies in the VHF and UHF bands , 1977, IEEE Transactions on Vehicular Technology.

[36]  Denis Ullmo,et al.  Wireless propagation in buildings: a statistical scattering approach , 1999 .

[37]  Francisco Falcone,et al.  A Ray Launching-Neural Network Approach for Radio Wave Propagation Analysis in Complex Indoor Environments , 2014, IEEE Transactions on Antennas and Propagation.

[38]  J.-E. Berg,et al.  Propagation models, cell planning and channel allocation for indoor applications of cellular systems , 1993, IEEE 43rd Vehicular Technology Conference.

[39]  Theodore S. Rappaport,et al.  Wireless communications - principles and practice , 1996 .

[40]  Vittorio Degli-Esposti,et al.  Ray tracing propagation modeling for future small‐cell and indoor applications: A review of current techniques , 2015 .

[41]  A mathematical technique for an exact small-signal field analysis of multiple-stream interaction in a finite longitudinal magnetic field , 1969 .