79 citations · 338 across the 22 of their papers we have counts for
23 papers
Backscatter Measurements and Models for RF Sensing Applications in Cluttered Environments
Dmitry Chizhik, Jinfeng Du, Jakub Sapis +6
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-monostati…
Measured and Modeled Outdoor Indoor Coverage at 28 GHz into High Thermal Efficiency Buildings
Dmitry Chizhik, Jinfeng Du, Reinaldo Valenzuela +3
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 inci…
28 GHz NLOS Channel Measurements Revealing Low Path Loss and High Angular Spread in Container Ports
Andrea Bedin, Dmitry Chizhik, Jinfeng Du +4
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 perfo…
Precoding-oriented Massive MIMO CSI Feedback Design
Fabrizio Carpi, Sivarama Venkatesan, Jinfeng Du +3
Downlink massive multiple-input multiple-output (MIMO) precoding algorithms in frequency division duplexing (FDD) systems rely on accurate channel state information (CSI) feedback…
Energy Efficient Extreme MIMO: Design Goals and Directions
Stefan Wesemann, Jinfeng Du, Harish Viswanathan
Ever since the invention of Bell Laboratories Layer Space-Time (BLAST) in mid 1990s, the focus of MIMO research and development has been largely on pushing the limit of spectral ef…
A wideband generalization of the near-field region for extremely large phased-arrays
Nitish Deshpande, Miguel R. Castellanos, Saeed R. Khosravirad +3
The narrowband and far-field assumption in conventional wireless system design leads to a mismatch with the optimal beamforming required for wideband and near-field systems. This d…
Outdoor-to-Indoor 28 GHz Wireless Measurements in Manhattan: Path Loss, Environmental Effects, and 90% Coverage
Manav Kohli, Abhishek Adhikari, Gulnur Avci +12
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 co…
Dense Urban Outdoor-Indoor Coverage from 3.5 to 28 GHz
Dipankar Shakya, Dmitry Chizhik, Jinfeng Du +2
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…
Polar Coded Modulation via Hybrid Bit Labeling
Hanwen Yao, Jinfeng Du, Alexander Vardy
Bit-interleaved coded modulation (BICM) and multilevel coded modulation (MLC) are commonly used to combine polar codes with high order modulation. While BICM benefits from simple d…
Machine Learning-based Urban Canyon Path Loss Prediction using 28 GHz Manhattan Measurements
Ankit Gupta, Jinfeng Du, Dmitry Chizhik +2
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…
Sampling and Reconstructing Angular Domains with Uniform Arrays
Silvio Mandelli, Marcus Henninger, Jinfeng Du
The surge of massive antenna arrays in wireless networks calls for the adoption of analog/hybrid array solutions, where multiple antenna elements are driven by a common radio front…
Universal Path Gain Laws for Common Wireless Communication Environments
Dmitry Chizhik, Jinfeng Du, Reinaldo A. Valenzuela
Simple and accurate expressions for path gain are derived from electromagnetic fundamentals in a wide variety of common environments, including Line-of-Sight (LOS) and Non-Line-of-…
Beamforming Learning for mmWave Communication: Theory and Experimental Validation
ohaned Chraiti, Dmitry Chizhik, Jinfeng Du +3
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 a…
Matching in the Air: Optimal Analog Beamforming under Angular Spread
Jinfeng Du, Marcin Rybakowski, Kamil Bechta +1
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…
Directional Measurements in Urban Street Canyons from Macro Rooftop Sites at 28 GHz for 90% Outdoor Coverage
Jinfeng Du, Dmitry Chizhik, Reinaldo A. Valenzuela +6
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 street…
Suburban Fixed Wireless Access Channel Measurements and Models at 28 GHz for 90% Outdoor Coverage
Jinfeng Du, Dmitry Chizhik, Rodolfo Feick +3
Achieving adequate coverage with high gain antennas is key to realizing the full promise of the wide bandwidth available at cm/mm bands. We report extensive outdoor measurements at…
Suburban Residential Building Penetration Loss at 28 GHz for Fixed Wireless Access
Jinfeng Du, Dmitry Chizhik, Rodolfo Feick +3
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…
Path Loss and Directional Gain Measurements at 28 GHz for non-Line-of-Sight Coverage of Indoors with Corridors
Dmitry Chizhik, Jinfeng Du, Rodolfo Feick +3
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 (10…
How Much Spectrum is Too Much in Millimeter Wave Wireless Access
Jinfeng Du, Reinaldo A. Valenzuela
A great increase in wireless access rates might be attainable by using the large amount of spectrum available in the millimeter wave (mmWave, 30 - 300 GHz) band. However, due to hi…
Gbps User Rates Using mmWave Relayed Backhaul with High Gain Antennas
Jinfeng Du, Efe Onaran, Dmitry Chizhik +2
Delivering Gbps high user rate over long distances (around 1 km) is challenging, and the abundant spectrum available in millimeter wave band cannot solve the challenge by its own d…
Analysis on 60 GHz Wireless Communications with Beamwidth-Dependent Misalignment
Guang Yang, Jinfeng Du, Ming Xiao
High speed wireless access on 60 GHz spectrum relies on high-gain directional antennas to overcome the severe signal attenuation. However, perfect alignment between transmitting an…
Unified Capacity Limit of Non-coherent Wideband Fading Channels
Felipe Gomez-Cuba, Jinfeng Du, Muriel Médard +1
In non-coherent wideband fading channels where energy rather than spectrum is the limiting resource, peaky and non-peaky signaling schemes have long been considered species apart,…
Scalable Capacity Bounding Models for Wireless Networks
Jinfeng Du, Muriel Medard, Ming Xiao +1
The framework of network equivalence theory developed by Koetter et al. introduces a notion of channel emulation to construct noiseless networks as upper (resp. lower) bounding mod…