Fausto Granda, Leyre Azpilicueta, Cesar Vargas‐Rosales, Peio López-Iturri, Erik Aguirre, José Javier Astráin, Jesús Villandangos, Francisco Falcone,
Vehicular ad hoc Networks (VANETs) enable vehicles to communicate with each other as well as with roadside units (RSUs). Although there is a significant research effort in radio channel modeling focused on vehicle-to-vehicle (V2V), not much work has been done for vehicle-to-infrastructure (V2I) using 3D ray-tracing tools. This work evaluates some important parameters of a V2I wireless channel link such as large-scale path loss and multipath metrics in a typical urban scenario using a deterministic simulation ...
Tópico(s): Traffic control and management
2017 - Multidisciplinary Digital Publishing Institute | Sensors
Leyre Azpilicueta, Cesar Vargas‐Rosales, Francisco Falcone,
Intelligent transportation systems (ITSs) are currently under intense research and development for making transportation safer and more efficient. The development of such vehicular communication systems requires accurate models for the propagation channel. A key characteristic of these channels is their temporal variability and inherent time-changing statistics, which have a major impact on electromagnetic propagation prediction.
Tópico(s): Vehicular Ad Hoc Networks (VANETs)
2016 - Institute of Electrical and Electronics Engineers | IEEE Vehicular Technology Magazine
Fausto Granda, Leyre Azpilicueta, Cesar Vargas‐Rosales, Mikel Celaya-Echarri, Peio López-Iturri, Erik Aguirre, José Javier Astráin, Pablo Medrano, Jesús Villandangos, Francisco Falcone,
Vehicular Ad Hoc Networks (VANETs) are envisaged to be a critical building block of Smart Cities and Intelligent Transportation System (ITS) where applications for pollution, congestion reduction, vehicle mobility improvement, accident prevention and safer roads are some of the VANETs expected benefits towards Intelligent Vehicle Communications. Although there is a significant research effort in Vehicle-to-Infrastructure (V2I) and Vehicle-to-Vehicle (V2V) communication radio channel characterization, ...
Tópico(s): Autonomous Vehicle Technology and Safety
2018 - Multidisciplinary Digital Publishing Institute | Sensors
Leyre Azpilicueta, Peio López-Iturri, Erik Aguirre, Cesar Vargas‐Rosales, Arancha León, Francisco Falcone,
In this paper, an adaptive meshing solution implemented in an in-house developed three-dimensional ray launching algorithm to model the radio wave propagation channel in large environments is presented. Results show that when large scenarios are analyzed, adaptive meshing is necessary to avoid algorithm divergence, leading to accurate results when comparing with real measurements. In addition, simulation results of an indoor large and complex scenario in terms of received power and power delay profile ...
Tópico(s): Antenna Design and Analysis
2017 - Taylor & Francis | Journal of Electromagnetic Waves and Applications
Fausto Granda, Leyre Azpilicueta, Mikel Celaya-Echarri, Peio López-Iturri, Cesar Vargas‐Rosales, Francisco Falcone,
In this work, Vehicle-to-everything (V2X) wireless communications performance is analyzed, in order to account for inherent scenario complexity, in the deployment phase of wireless systems towards the implementation of a Context Aware environment. An urban environment has been simulated by means of an in-house three-dimensional (3D) Ray Launching algorithm, coupled with a microscopic vehicular movement simulator, accounting for embedded urban elements as well as variable traffic densities within the ...
Tópico(s): Autonomous Vehicle Technology and Safety
2020 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Intelligent Transportation Systems
Diego Fernando Carrera, Cesar Vargas‐Rosales, Leyre Azpilicueta, José Alejandro Galaviz‐Aguilar,
In this work, a comparative analysis is performed to study the bit error rate and error vector magnitude achieved with the least-squares (LS), the minimum mean squared error (MSE), and the Kalman filter (KF) channel estimators when these are applied to the maximum-ratio combining (MRC) and the regularised zero-forcing (RZF) receivers. The MSE achieved with the different channel estimators was also compared by varying the noise and interference power at the receiver. The proposed methodology relies on ...
Tópico(s): Cooperative Communication and Network Coding
2020 - Institution of Engineering and Technology | IET Communications
Mahdi Zareei, A. K. M. Muzahidul Islam, Sabariah Baharun, Cesar Vargas‐Rosales, Leyre Azpilicueta, Nafees Mansoor,
New wireless network paradigms will demand higher spectrum use and availability to cope with emerging data-hungry devices. Traditional static spectrum allocation policies cause spectrum scarcity, and new paradigms such as Cognitive Radio (CR) and new protocols and techniques need to be developed in order to have efficient spectrum usage. Medium Access Control (MAC) protocols are accountable for recognizing free spectrum, scheduling available resources and coordinating the coexistence of heterogeneous ...
Tópico(s): Wireless Networks and Protocols
2017 - Multidisciplinary Digital Publishing Institute | Sensors
Leyre Azpilicueta, José Javier Astráin, Peio López-Iturri, Fausto Granda, Cesar Vargas‐Rosales, Jesús Villadangos, Asier Perallos, Alfonso Bahillo, Francisco Falcone,
In this paper, intra-wagon wireless communication performance is analyzed, in order to account for inherent scenario complexity in the deployment phase of wireless systems toward the implementation of a context-aware environment. A real commercial passenger wagon has been simulated by means of an in-house-developed 3-D ray launching code, accounting for embedded wagon elements as well as variable user densities within the passenger wagon. Onboard measurements of a designed and deployed wireless ...
Tópico(s): Wireless Body Area Networks
2017 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Intelligent Transportation Systems
Leyre Azpilicueta, Peio López-Iturri, Jaime Zuñiga-Mejia, Mikel Celaya-Echarri, Fidel Alejandro Rodríguez-Corbo, Cesar Vargas‐Rosales, Erik Aguirre, David G. Michelson, Francisco Falcone,
In this work, the channel characterization in terms of large-scale propagation, small-scale propagation, statistical and interference analysis of Fifth-Generation (5G) Millimeter Wave (mmWave) bands for wireless networks for 28, 30 and 60 GHz is presented in both an outdoor urban complex scenario and an indoor scenario, in order to consider a multi-functional, large node-density 5G network operation. An in-house deterministic Three-Dimensional Ray-Launching (3D-RL) code has been used for that purpose, ...
Tópico(s): Antenna Design and Analysis
2020 - Multidisciplinary Digital Publishing Institute | Sensors
Mahdi Zareei, Cesar Vargas‐Rosales, Rafaela Villalpando‐Hernandez, Leyre Azpilicueta, Mohammad Hossein Anisi, Mubashir Husain Rehmani,
The design of routing protocols for wireless sensor networks (WSNs) has been traditionally tackled by assuming battery-powered sensors, in which minimizing the power consumption was the main objective. Advances in technology and the ability to harvest energy from the environment has enabled self-sustaining systems and thus diminish the significance of network lifetime considerations in the design of WSNs. Although WSNs operated by energy-harvesting sensors are not limited by network lifetime, they ...
Tópico(s): Innovative Energy Harvesting Technologies
2018 - Elsevier BV | Computer Networks
Diego Fernando Carrera, Cesar Vargas‐Rosales, Noe M. Yungaicela-Naula, Leyre Azpilicueta,
In this paper, we compare two artificial neural networks (ANNs) approaches designed to perform channel equalization for millimeter-wave (mmWave) signals operating in the 28 GHz frequency band. We used an in-house deterministic Three-Dimensional Ray-Launching (3D-RL) code to simulate the spatial structure of mmWave channels considering the material properties of the obstacles within the scenario at the frequency under analysis. We performed offline training of a multilayer perceptron (MLP) neural network ...
Tópico(s): Full-Duplex Wireless Communications
2021 - Institute of Electrical and Electronics Engineers | IEEE Access
Leyre Azpilicueta, Cesar Vargas‐Rosales, Ana Vázquez Alejos, Francisco Falcone,
In this chapter, the requirements and challenges in the design and analysis of advanced wireless communication systems for vehicular communications (from V2V to V2X) will be presented. The characteristics and challenges in wireless channel behavior will be described, from RF-mmWave to future THz frequency bands. Different types of vehicular network configurations, in terms of antenna subsystems and transceivers, will be described, as well as in relation with the impact of dense urban and urban and ...
Tópico(s): Opportunistic and Delay-Tolerant Networks
2022 - Springer Vienna | Signals and communication technology
Fausto Granda, Leyre Azpilicueta, Darwin Aguilar, Cesar Vargas‐Rosales,
Vehicular ad hoc networks (VANETs) enable vehicles to communicate with each other as well as with roadside units (RSUs), and Smart Cities must be able to take advantage of its applications and benefits on transportation operations. In urban environments some propagation impairments as reflection from, diffraction around and transmission loss through objects gives rise temporal and spatial variation of path loss and multipath effects. This work evaluates some parameters of a Vehicle-to-Infrastructure ( ...
Tópico(s): UAV Applications and Optimization
2018 - Universidad de las Fuerzas Armadas - ESPE | Congreso de Ciencia y Tecnología ESPE
Diego Fernando Carrera, Cesar Vargas‐Rosales, Leyre Azpilicueta, Fausto Granda,
In this article, we propose a new pilot mapping method to jointly estimate the channel state information of the user while reducing the interference effects of multiuser multicell mobile scenarios. The problem of achieving the wireless performance of the minimum mean square error (MMSE) receiver with the maximum ratio (MR) combiner for massive multiple-input multiple-output (MIMO) systems in the frequency bands of 2.5 GHz and 28 GHz is addressed. By transmitting fewer pilots in the uplink communications ...
Tópico(s): Advanced Wireless Communication Techniques
2021 - Institution of Engineering and Technology | IET Communications
Antioxidants Editorial Office,
... Suarez, JoseLjubenkov, IvicaAmarowicz, RyszardLo Scalzo, RobertoAmorati, RiccardoLoboda, AgnieszkaAncìn-Azpilicueta, CarmenLobysheva, IrinaAngelino, DonatoLodyga-Chruscinska, ElzbietaAngelone, TommasoLogan, MargaretAngelova, AngelinaLognay, ... EdwinYang, Chuen-MaoLatunde-Dada, Gladys OluyemisiYang, JialeLau-Cam, Cesar A.Yang, KunLauro, DavideYang, Wei-hsiungLauschke, Volker M. ...
Tópico(s): Human Health and Disease
2020 - Multidisciplinary Digital Publishing Institute | Antioxidants