Explanipedia

Achievable directive antenna gain measurements and modeling for 60 GHz indoor links Open

Sebastián Bruna, Mauricio Rodríguez, Rodolfo Feick, Francisco Pizarro, Reinaldo A. Valenzuela , et al. · 2025

Highly directive antennas may be a key component in millimeter wave links to offset their inherently high path losses. In cluttered scenarios such as Non-Line-Of-Sight (NLOS) indoor settings, antenna gain is degraded by the interaction of …

Information Management: An Innovative Process for Sustainability Open

Reinaldo A. Valenzuela · 2025

The study aimed to develop a protocol that serves as the foundation for implementing a sustainable information management system within the Department of Education Region IV-A(CALABARZON). The research assessed critical features of informa…

Passivity‐Based Robust Stability Analysis of the Converter–Grid Interaction and Passivity‐Shaping Controller Design Open

Julia Kowalewski, Andreas Lorenz, Federico Thomas, Reinaldo A. Valenzuela, Knut Graichen · 2025

With the increasing integration of high‐voltage direct current (HVDC) systems based on modular multilevel converter (MMC) technology in the power grid, the stability of the transmission system is increasingly affected. Guaranteeing robust …

Site-Specific Radio Channel Representation for 5G and 6G Open

Thomas Zemen, Jorge Gomez‐Ponce, Aniruddha Chandra, Michael Walter, Enes Aksoy , et al. · 2024

A site-specific radio channel representation (SSCR) takes the surroundings of the communication system into account by considering the environment geometry, including buildings, vegetation, and mobile objects with their material and surfac…

Backscatter Measurements and Models for RF Sensing Applications in Cluttered Environments Open

Dmitry Chizhik, Jinfeng Du, Jakub Sapis, Reinaldo A. Valenzuela, Abhishek Adhikari , et al. · 2024

A statistical backscatter channel model for indoor clutter is developed for indoor RF sensing applications based on measurements. A narrowband 28 GHz sounder used a quazi-monostatic radar arrangement with an omnidirectional transmit antenn…

28 GHz NLOS Channel Measurements Revealing Low Path Loss and High Angular Spread in Container Ports Open

Andrea Bedin, Dmitry Chizhik, Jinfeng Du, Martti Moisio, Karthik Upadhya , et al. · 2023

This paper presents results from a comprehensive measurement campaign conducted at 28 GHz inside a container canyon within a commercial port environment. The measurements are performed at various points inside the container canyon, conside…

Measured and Modeled Outdoor Indoor Coverage at 28 GHz into High Thermal Efficiency Buildings Open

Dmitry Chizhik, Jinfeng Du, Reinaldo A. Valenzuela, Andrea Bedin, Martti Moisio , et al. · 2023

28 GHz outdoor-indoor coverage into modern office buildings with high thermal efficiency windows is found to be severely limited due to 46 dB median penetration loss at normal incidence and additional 15 dB median oblique incidence loss. T…

Outdoor-to-Indoor 28 GHz Wireless Measurements in Manhattan: Path Loss, Environmental Effects, and 90% Coverage Open

Manav Kohli, Abhishek Adhikari, Gulnur Avci, Sienna Brent, Aditya Dash , et al. · 2022

Outdoor-to-indoor (OtI) signal propagation further challenges the already tight link budgets at millimeter-wave (mmWave). To gain insight into OtI mmWave scenarios at 28 GHz, we conducted an extensive measurement campaign consisting of ove…

Dense Urban Outdoor-Indoor Coverage from 3.5 to 28 GHz Open

Dipankar Shakya, Dmitry Chizhik, Jinfeng Du, Reinaldo A. Valenzuela, Theodore S. Rappaport · 2022

In the US, people spend 87% of their time indoors and have an average of four connected devices per person (in 2020). As such, providing indoor coverage has always been a challenge but becomes even more difficult as carrier frequencies inc…

Machine Learning-Based Urban Canyon Path Loss Prediction Using 28 GHz Manhattan Measurements Open

Ankit Gupta, Jinfeng Du, Dmitry Chizhik, Reinaldo A. Valenzuela, Mathini Sellathurai · 2022

Large bandwidth at mm-wave is crucial for 5G and beyond but the high path\nloss (PL) requires highly accurate PL prediction for network planning and\noptimization. Statistical models with slope-intercept fit fall short in\ncapturing large …

Machine Learning-based Urban Canyon Path Loss Prediction using 28 GHz Manhattan Measurements Open

Ankit Gupta, Jinfeng Du, Dmitry Chizhik, Reinaldo A. Valenzuela, Mathini Sellathurai · 2022

Large bandwidth at mm-wave is crucial for 5G and beyond but the high path loss (PL) requires highly accurate PL prediction for network planning and optimization. Statistical models with slope-intercept fit fall short in capturing large var…

Empirical Comparison of Propagation Models for Relay-Based Networks in Urban Environments Open

Virginia Silva, Rodolfo Feick, Luciano Ahumada, Reinaldo A. Valenzuela, Milan S. Derpich , et al. · 2022

We investigate propagation characteristics for wireless channels, applicable to Integrated Access and Backhaul (IAB) and relay-based networks with lamppost-height nodes at 5.5 GHz. We compare our empirical results with a variety of models …

Directional Measurements in Urban Street Canyons From Macro Rooftop Sites at 28 GHz for 90% Outdoor Coverage Open

Jinfeng Du, Dmitry Chizhik, Reinaldo A. Valenzuela, Rodolfo Feick, Guillermo Castro , et al. · 2020

Path gain and effective directional gain in azimuth in urban canyons from actual rooftop base station sites are characterized based on a massive data set of 3000 links on 12 streets in two cities, with over 21 million individual continuous…

Path Loss and Directional Gain Measurements at 28 GHz for Non-Line-of-Sight Coverage of Indoors With Corridors Open

Dmitry Chizhik, Jinfeng Du, Rodolfo Feick, Mauricio Rodríguez, Guillermo Castro , et al. · 2020

Adequate coverage with high gain antennas is key to realizing the full promise of the bandwidth available at mm/cm wave bands. We report extensive indoor measurements at 28 GHz (1000 links, 9.9 million individual power measurements, 10 off…

Beamforming Learning for mmWave Communication: Theory and Experimental Validation Open

Mohaned Chraiti, Dmitry Chizhik, Jinfeng Du, Reinaldo A. Valenzuela, Ali Ghrayeb , et al. · 2019

To establish reliable and long-range millimeter-wave (mmWave) communication, beamforming is deemed to be a promising solution. Although beamforming can be done in the digital and analog domains, both approaches are hindered by several cons…

Matching in the Air: Optimal Analog Beamforming under Angular Spread Open

Jinfeng Du, Marcin Rybakowski, Kamil Bechta, Reinaldo A. Valenzuela · 2019

Gbps wireless transmission over long distance at high frequency bands has great potential for 5G and beyond, as long as high beamforming gain could be delivered at affordable cost to combat the severe path loss. With limited number of RF c…

Empirical Rates Characterization of Wearable Multi-Antenna Terminals for First-Responders Open

Estefanía Crespo-Bardera, Mauricio Rodríguez, Matilde Sánchez-Fernández, Eva Rajo‐Iglesias, Rodolfo Feick , et al. · 2019

Empirical characterization of the achievable rates for a wearable multi-antenna terminal shows the potential advantages of deploying a large number of antennas at the user end. We focus on the challenges and requirements of the broadband c…

Suburban Residential Building Penetration Loss at 28 GHz for Fixed Wireless Access Open

Jinfeng Du, Dmitry Chizhik, Rodolfo Feick, Guillermo Castro, Mauricio Rodríguez , et al. · 2018

Fixed wireless access at mm/cm bands has been proposed for high-speed broadband access to suburban residential customers and building penetration loss is a key parameter. We report a measurement campaign at 28 GHz in a New Jersey suburban …

Path loss, beamforming gain and time dynamics measurements at 28 GHz for 90% indoor coverage. Open

Dmitry Chizhik, Jinfeng Du, Rodolfo Feick, Mauricio Rodríguez, Guillermo Castro , et al. · 2017

Achieving adequate coverage with high gain antennas is key to realizing the full promise of the wide bandwidth available at mm/cm bands. We report extensive indoor measurements at 28 GHz, with over 1000 links with and without Line-of-Sight…

Path Loss and Directional Gain Measurements at 28 GHz for\n non-Line-of-Sight Coverage of Indoors with Corridors Open

Dmitry Chizhik, Jinfeng Du, Rodolfo Feick, Mauricio Rodríguez, Guillermo R. Castro , et al. · 2017

Adequate coverage with high gain antennas is key to realizing the full\npromise of the bandwidth available at mm/cm wave bands. We report extensive\nindoor measurements at 28 GHz (1000 links, 9.9 million individual power\nmeasurements, 10 …

Massive BLAST: An Architecture for Realizing Ultra-High Data Rates for Large-Scale MIMO Open

Ori Shental, Sivarama Venkatesan, Alexei Ashikhmin, Reinaldo A. Valenzuela · 2017

A detection scheme for uplink massive MIMO, dubbed massive-BLAST or M-BLAST, is proposed. The derived algorithm is an enhancement of the well-known soft parallel interference cancellation. Using computer simulations in massive MIMO applica…

Map-based Millimeter-Wave Channel Models: An Overview, Hybrid Modeling, Data, and Learning Open

Yeon Geun Lim, Yae Jee Cho, Min Soo Sim, Younsun Kim, Chan‐Byoung Chae , et al. · 2017

Compared to the current wireless communication systems, millimeter wave (mm-Wave) promises a wide range of spectrum. As viable alternatives to existing mm-Wave channel models, various map-based channel models with different modeling method…

Massive BLAST: An Architecture for Realizing Ultra-High Data Rates for\n Large-Scale MIMO Open

Ori Shental, Sivarama Venkatesan, Alexei Ashikhmin, Reinaldo A. Valenzuela · 2017

A detection scheme for uplink massive MIMO, dubbed massive-BLAST or M-BLAST,\nis proposed. The derived algorithm is an enhancement of the well-known soft\nparallel interference cancellation. Using computer simulations in massive MIMO\nappl…

Gbps User Rates Using mmWave Relayed Backhaul With High-Gain Antennas Open

Jinfeng Du, Efe Onaran, Dmitry Chizhik, Sivarama Venkatesan, Reinaldo A. Valenzuela · 2017

Delivering Gbps high user rate over long distances (around 1 km) is\nchallenging, and the abundant spectrum available in millimeter wave band cannot\nsolve the challenge by its own due to the severe path loss and other\nlimitations. Since …

Measurement-Based Evaluation of Spectral Efficiencies in Outdoor-Indoor Multiuser MISO Systems in Femto-Cells Open

Flávio de Oliveira Silva, Rodolfo Feick, Reinaldo A. Valenzuela, Milan S. Derpich, Luciano Ahumada · 2016

Based on measurements for a street-canyon-type femto-cell, we compare the downlink spectral efficiencies of various intra-cell interference mitigation systems. This includes zero-forcing (ZF), regularized ZF (RZF), and dirty-paper coding (…

Wi-Fi Scaling and Performance in Dense Frequency Planned Networks Open

Jonathan Ling, Howard Huang, Reinaldo A. Valenzuela · 2016

The capacity scaling of a Wi-Fi network with fixed transmit power is investigated. The 802.11 MAC appears to impose a hard limit on the area capacity by enforcing single transmissions in overlapped cell coverage areas. However due to the d…

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