Article
Chemistry, Multidisciplinary
Tomas Straka, Lukas Vojtech, Marek Neruda
Summary: This paper presents a new approach to predicting indoor UHF RFID signal coverage using a graphical ray tracing method, which can generate a heat map with the accuracy of the Multi-Wall model.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Electrical & Electronic
Kiraseya Preusser, Anke Schmeink
Summary: Robust channel models for indoor areas are crucial for network planning and can improve the accuracy of resource allocation and network planning techniques. This study conducted measurements in different indoor environments and compared various models, finding that the combination of artificial neural networks and the free-space path loss model is the most robust for accurately predicting propagation in indoor environments.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Computer Science, Information Systems
Huthaifa Obeidat, Atta Ullah, Ali AlAbdullah, Waqas Manan, Omar Obeidat, Wafa Shauieb, Yousef Dama, Chakib Kara-Zaitri, Raed Abd-Alhameed
Summary: This study investigates the impact of changing the electrical properties of materials in the Wireless InSite (WI) ray-tracing software in an indoor propagation environment at 60 GHz. The study also explores factors such as antenna dimensions and patterns. Experimental results suggest that WI can perform acceptably under certain conditions.
Article
Chemistry, Analytical
Fernando Sanchez Iglesias, Antonio Fernandez Lopez
Summary: This study introduces a novel method based on ray tracing for analyzing wave propagation in composites tailored for structural health monitoring. The ray tracing method offers advantages over the commonly used finite element method in computational resource utilization. It has been evaluated against various example cases and proven to be a valuable tool for studying wave propagation and identifying damage indicators in structural health monitoring.
Article
Engineering, Electrical & Electronic
Denis Bilibashi, Enrico M. Vitucci, Vittorio Degli-Esposti
Summary: Ray tracing algorithms are popular for simulating multipath radio propagation in environments with obstacles. The dynamic ray tracing approach can predict multipath evolution within a given time lapse without rerunning the simulation for every snapshot, reducing both human labor and computation time. It has the potential for real-time field prediction in mobile radio systems.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Computer Science, Information Systems
Rym Hicheri, Matthias Patzold
Summary: This letter introduces a novel iterative positioning method for tracing body segments of a person moving indoors using radio-frequency signals. The method models the person as a cluster of moving point scatterers and estimates the time-variant positions by fitting the channel model's time-variant channel transfer function to the measured channels, demonstrating high accuracy in numerical results.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Seokyeon Hong, Yongwan Kim, Jungsuek Oh
Summary: This article presents a 38.5 GHz transmitarray embedded into laminated car glass for the first time, and validates the enhanced indoor 5G connectivity using a ray-tracing simulator. The transmitarray structure reduces penetration loss and achieves desired beam shaping. By comparing communication performance, it is confirmed that the transmitarray increases field intensity by up to approximately 5 dB in the target area. Furthermore, the transmitarray laminated glass increases field intensity by more than 3 dB.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Computer Science, Information Systems
Kehai Qiu, Stefanos Bakirtzis, Hui Song, Jie Zhang, Ian Wassell
Summary: The study leverages deep learning to boost outdoor path loss prediction performance in the 5G scenario, achieving a performance comparable to a 3D ray tracing simulator and being 30 times faster.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Sergei Shikhantsov, Andrea Guevara, Arno Thielens, Gunter Vermeeren, Piet Demeester, Luc Martens, Guy Torfs, Sofie Pollin, Wout Joseph
Summary: The letter investigates spatial correlation properties of radio-frequency massive MIMO channels, focusing on the correlation between channel vectors at the receive side. The study shows that the ray-tracing model accurately predicts correlation within several wavelengths of interreceiver distances, capturing the variation of the correlation function profile with increasing receiver to BS separation distance.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2021)
Article
Computer Science, Information Systems
Roman Novak, Andrej Hrovat, Michael D. Bedford, Tomaz Javornik
Summary: This study analyzes the performance of ray tracing in two caves in the UK and/nand compares the effects of model simplification methods. By reducing the number of facets, simulation time can be significantly decreased./nIn the comparison of ray-tracing and experimental measurements, the Quadric Edge/nCollapse method is shown to be more effective.
Article
Physics, Multidisciplinary
Meng-Qiang Cai, Qiang Wang, Yong-Nan Li, Cheng-Hou Tu
Summary: By using the ray-tracing method, this study investigated the propagation and focusing characteristics of vortex beams with a top-hat intensity distribution. A mathematical model was established to understand the mechanisms underlying the spatial evolution of these beams. Experimental observations were consistent with theoretical predictions, providing valuable insights into the propagation and evolution of vortex beams.
FRONTIERS IN PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Yi Chen, Yuanbo Li, Chong Han, Ziming Yu, Guangjian Wang
Summary: This study investigates the indoor channel characteristics of THz communications by conducting extensive channel measurement activities and studying hybrid channel models. Through careful system calibration, MPC clustering, and ray-tracing techniques, the research comprehensively analyzes the propagation features and multi-path characteristics of THz signals.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Gungor Yildirim, Emrullah Gunduzalp, Yetkin Tatar
Summary: Radio propagation predictions are crucial in infrastructure systems using radio communication, with ray-tracing methods like shooting and bouncing rays being successful but facing challenges with unnecessary ray tracing. This study proposes a method that eliminates unnecessary rays using fuzzy logic based on ray characteristics, not indoor environment geometry, showing promising results in comparison with real measurements and traditional simulations. Additionally, the study provides theoretical and mathematical details for researchers interested in this field.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2022)
Article
Computer Science, Hardware & Architecture
Youqing Wang, Kun Zhao, Zhengqi Zheng
Summary: In this paper, a 3D indoor multipath signal model is built and 3D indoor positioning with a single base station is achieved by utilizing multipath channels. The proposed algorithm accurately matches the angles of arrival (AoAs) and time of arrival (ToAs) of each signal, and obtains linear equations of multipath channels with ray tracing modeling for 3D indoor positioning. An angle compensation algorithm is proposed by evaluating the probability weight of each multipath AoA and compensating the AoA according to the weights. Simulation results show that the proposed algorithm achieves positioning accuracy within 0.64 m in 90% of the cases, and within 0.25 m in 50% of the cases.
MOBILE NETWORKS & APPLICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Aristeidis Seretis, Costas D. Sarris
Summary: A fundamental challenge in machine learning for electromagnetics is predicting output quantities in untrained geometries. We propose generalizable models for indoor propagation that can predict received signal strengths in new geometries, for transmitters and receivers of multiple positions, and for new frequencies. By exploiting physical insights in training, we can efficiently learn basic and complex propagation mechanisms.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)