Article
Telecommunications
Carlos A. Gutierrez, Willie Harrison, Michael Rice, Benjamin Jensen, Kalin Norman, Bryan Redd, Autumn Twitchell, Marco Cardenas-Juarez
Summary: This paper investigates the characteristics of vehicle-to-vehicle communication in mountainous roads through measurement campaigns in Mexico and the US. The results show the distribution and Doppler spectrum of communication channels, with the line-of-sight path playing a significant role but non-line-of-sight paths also contributing to short intervals of communication. These findings provide guidelines for analytical modeling and computer simulation of small-scale vehicle-to-vehicle channels in mountainous environments.
VEHICULAR COMMUNICATIONS
(2023)
Article
Computer Science, Information Systems
Carlos A. Gomez-Vega, Jorge Cardenas, Juan C. Ornelas-Lizcano, Carlos A. Gutierrez, Marco Cardenas-Juarez, Jose M. Luna-Rivera, Ruth M. Aguilar-Ponce
Summary: This paper presents the implementation of a Doppler spectrum measurement platform for narrowband frequency-dispersive vehicle-to-vehicle (V2V) channels. The platform utilizes a continuous-wave channel sounding approach and is capable of characterizing the Doppler spectrum and signatures of V2V channels in relevant road-safety scenarios. The platform was evaluated in field experiments conducted in Mexico, and the obtained results demonstrate its effectiveness in spectral characterization of narrowband V2V channels.
Article
Engineering, Electrical & Electronic
Juan M. Romero-Jerez, F. Javier Lopez-Martinez, Juan P. Pena-Martin, Ali Abdi
Summary: This paper introduces a comprehensive statistical characterization of the multipath wireless channel and demonstrates its applicability in various wireless scenarios. It shows that the fluctuations of the specular components have a detrimental impact on performance, and it is formally demonstrated that concentrating the signal power on a single specular component yields a lower error rate.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Wen-Long Chin, Jia-Han Lin, Wen-Chao Wu, Hsiao-Hwa Chen
Summary: This paper introduces a new method for estimating the Doppler frequency in time-variant multipath fading channels. The method utilizes the time diversity of random processes with various time intervals and employs a maximum-likelihood algorithm. A closed-form weighted least-square equation is derived, and the Cramér-Rao lower bound of the estimation is analyzed. The results demonstrate good performance of the proposed method in terms of Doppler frequency estimation accuracy.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Hengtai Chang, Cheng-Xiang Wang, Yu Liu, Jie Huang, Jian Sun, Wensheng Zhang, Zhiquan Bai, Kang An, Zengliang Li, El-Hadi M. Aggoune
Summary: This article proposes a 3-D twin cluster geometry-based stochastic model (GBSM) to describe the characteristics of underground vehicular channels in different scenarios. The model can simulate nonstationarity, near-field/far-field differences, and waveguide effects. Statistical characteristics of the channel, such as temporal autocorrelation function, spatial cross-correlation function, delay power spectrum density, and Doppler PSD, are derived and simulated based on the proposed model. Channel measurements and simulations in a garage scenario validate the accuracy and usefulness of the proposed GBSM.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Sandesh Rao Mattu, Lakshmi Narasimhan Theagarajan, A. Chockalingam
Summary: This paper proposes a novel receiver architecture using deep recurrent neural networks (RNNs) to accurately predict channel coefficients in time-varying fading channels, reducing the need for pilot symbols. Numerical results demonstrate the good performance of the proposed architecture in time-varying fading channels.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Sungjun Ahn, Jeongchang Kim, Seok-Ki Ahn, Sunhyoung Kwon, Sungho Jeon, David Gomez-Barquero, Pablo Angueira, Dazhi He, Cristiano Akamine, Mats Ek, Sesh Simha, Mark Aitken, Zhihong Hunter Hong, Yiyan Wu, Sung-Ik Park
Summary: This paper proposes several fading channel models to describe signal distortions in SFN environments. The models are based on measurements from metropolitan networks and can be useful for SFN system design and network planning.
IEEE TRANSACTIONS ON BROADCASTING
(2022)
Article
Chemistry, Analytical
Deyvid L. Leite, Pablo Javier Alsina, Millena M. de Medeiros Campos, Vicente A. de Sousa Jr, Alvaro A. M. de Medeiros
Summary: This paper presents a measurement setup using an unmanned aircraft to acquire data for the characterization of the radio frequency channel. It identifies the communication channel model, characterizes the effects of large-scale and small-scale fading, and estimates the aircraft speed from the identified Doppler frequency.
Article
Engineering, Electrical & Electronic
Boyu Hua, Haoran Ni, Qiuming Zhu, Cheng-Xiang Wang, Tongtong Zhou, Kai Mao, Junwei Bao, Xiaofei Zhang
Summary: This paper proposes a three-dimensional non-stationary hybrid model for UAV-to-ground channel in order to capture the channel characteristics of UAV's 3D trajectory, posture variation, and fuselage scattering effect. The channel parameters are generated using machine learning and ray tracing techniques, and the impact of posture variation and fuselage scattering on statistical properties is analyzed. The validity of the proposed model is verified by comparing simulation results with measured ones.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2023)
Article
Computer Science, Information Systems
Marion Berbineau, Romain Behaegel, Juan Moreno Garcia-Loygorri, Raul Torrego, Raffaele D'Errico, Ali Sabra, Ying Yan, Jose Soler
Summary: In the automotive and rail domains, vehicles are moving towards full automation with the help of wireless sensors and communication systems, transferring control functions from human drivers to computers. The Future Railway Mobile Communication System (FRMCS) is being developed at European level to meet current and future railway needs, based on IP, multi-bearer and resilient technology. The testing of different FRMCS prototypes in laboratory environments to simulate the effects of railway radio channels is crucial for the validation of railway communication systems and to save time and costs.
Article
Engineering, Electrical & Electronic
Xuejian Zhang, Ruisi He, Mi Yang, Bo Ai, Shaopeng Wang, Weiming Li, Wenpu Sun, Lizhe Li, Peng Huang, Yunlei Xue
Summary: The radio propagation characteristics in subway tunnels are essential for designing reliable wireless communications. Extensive propagation measurements were conducted at 1.8 and 5.8 GHz in a straight subway tunnel to obtain large-scale channel characteristics. Path loss, shadow fading, and channel correlation were extracted and modeled based on the measurements. The results provide valuable information for link budget, handover scheme design, and network planning of subway communication systems.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Computer Science, Information Systems
Manuel M. Ferreira, Filipe D. Cardoso, Slawomir J. Ambroziak, Luis M. Correia
Summary: This paper addresses the bandwidth dependence of propagation channel for Body Area Networks (BANs) in circular metallic environments. It proposes models to evaluate short-term fading margins based on system bandwidth. Deploying BANs in metallic indoor environments presents additional challenges due to specific propagation effects, and no studies of this kind can be found in literature. The paper also presents and discusses bandwidth dependent values of delay spread.
Article
Engineering, Electrical & Electronic
Hongyang Zhang, Xiaojing Huang, J. Andrew Zhang
Summary: In this paper, the OTFS modulation is restructured as a precoded OFDM system, with the introduction of a frequency-domain MMSE equalizer and an adaptive transmission scheme to improve system performance. Simulation results show significantly improved performance for short signal frames, demonstrating strong adaptability with imperfect CSI. Performance bounds derived can be used as benchmarks for OTFS and other precoded OFDM systems.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2021)
Article
Computer Science, Information Systems
Suneel Yadav, Devendra Singh Gurjar
Summary: This paper investigates the secrecy performance of a single-input multiple-output (SIMO) based underlay cognitive radio networks, analyzing the expressions for secrecy outage probability, intercept probability, and ergodic secrecy capacity over alpha - mu fading channels. The study reveals that a secrecy diversity order can be achieved under certain scenarios, but becomes zero in other cases. The impact of system/channel parameters on secrecy performance is validated through extensive simulation and numerical results, highlighting the detrimental effect of a higher number of eavesdropper antennas.
Article
Engineering, Electrical & Electronic
Daniel M. Mielke, Nicolas Schneckenburger, Uwe-Carsten Fiebig, Michael Walter, Miguel Bellido-Manganell
Summary: Operating remotely piloted aircraft relies on continuous data exchange between the air vehicle and the remote pilot, facilitated by reliable data links. This study conducted a channel sounding campaign to analyze the physical conditions of the communication channel, providing insights into power reception and amplitude distribution during different flight scenarios, highlighting the importance of considering reception power drops during certain maneuvers in designing data links for unmanned aviation.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
