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Advanced communications

Wireless (RF)

Search Publications

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Displaying 1 - 25 of 639

System-Level Calibration of a Millimeter-Wave Vector Signal Analyzer with Uncertainties

August 15, 2025
Author(s)
Joshua Kast, Paritosh Manurkar, Catherine Remley, Dylan Williams, Robert Horansky
We describe the system-level calibration of a vector signal analyzer operating in the 28 GHz frequency band, including the determination of uncertainties in the magnitude and phase of measurements of a traceably characterized calibration waveform. We then

Effective Radar Cross Section in Close-Range Joint Communication and Sensing Applications

July 14, 2025
Author(s)
Steve Blandino, Jelena Senic, Neeraj Varshney, Jihoon Bang, Jack Chuang, Samuel Berweger, Jian Wang, Camillo Gentile, Nada Golmie
Radar Cross Section (RCS) is traditionally mea- sured under far-field conditions where targets are fully illumi- nated by the antenna beam. However, in close-range scenarios, such as those encountered in Joint Communication and Sensing (JCAS) systems, the

Quasi-Deterministic Channel Propagation Model for Human Sensing: Gesture Recognition Use Case

July 9, 2025
Author(s)
Jack Chuang, Raied Caromi, Jelena Senic, Samuel Berweger, Neeraj Varshney, Jian Wang, Anuraag Bodi, Camillo Gentile, Nada Golmie
We describe a quasi-determinstic channel propagation model for human gesture recognition reduced from real-time measurements with our context aware channel sounder, considering four human subjects and 20 distinct body motions, for a total of 120,000

Characterization of Monostatic Base Stations Sensing Resolution Using 5G Reference Signals

July 1, 2025
Author(s)
Tanguy Ropitault, Steve Blandino, David Griffith, Thao Nguyen, Anirudha Sahoo, Nada Golmie
Sensing is poised to be a crucial feature in 6G, leading 3GPP to integrate sensing capabilities into the 5G New Radio (NR) framework. Significant progress has been made, but extensive work remains in defining architectures, protocol operations, and

Digital-Twin-Assisted Clustering of Radio-Frequency Multipath Components

June 26, 2025
Author(s)
Anuraag Bodi, Jihoon Bang, Neeraj Varshney, Samuel Berweger, Chiehping Lai, Jelena Senic, Jack Chuang, Camillo Gentile
Clustering radio-frequency (RF) multipath components (MPCs) fosters compact channel models by capturing the geometry of the scattering environment, yet "blind" methods based solely on RF data struggle to associate MPCs with individual scatterers. We

Measuring the RCS of Multipoint-Scattering Targets in JCAS Channel Sounding

May 25, 2025
Author(s)
Camillo Gentile, Jack Chuang, Steve Blandino, Jelena Senic, Jihoon Bang, Samuel Berweger
This paper presents a methodology for measuring the radar cross-section (RCS) of a target that scatters power from multiple points on its surface, in the context of joint communication and sensing (JCAS). By leveraging the fine resolution of millimeter

A QoE-Based Method for Quantifying and Comparing LTE Coverage

March 11, 2025
Author(s)
Wesley Garey, Yishen Sun, Richard Rouil
To determine the coverage of an LTE system, measurements such as the Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), and Signal to Interfer-ence and Noise Ratio (SINR) are often used. However, RSRP and RSRQ are only

Time transfer performance of Broadcast Positioning System (BPS)

January 28, 2025
Author(s)
Tariq Mondal, Jeffrey Sherman, David Howe
The Global Positioning System (GPS) is the most prevalent Global Navigation Satellite System (GNSS) that provides Position, Navigation, and Timing (PNT). GNSS vulnerability is well-known, and the search continues to find another independent system that can

Algorithm-Supervised Millimeter Wave Indoor Localization using Tiny Neural Networks

January 17, 2025
Author(s)
Anish Shastri, Steve Blandino, Camillo Gentile, Chiehping Lai, Paolo Casari
The quasi-optical propagation of mmw signals has been instrumental in designing high-accuracy localization algorithms. These algorithms either exploit the geometric properties of the mmw signals or are based on an environment's radio footprints, leading to

Rydberg states of alkali atoms in atomic vapor as SI-traceable field probes and communications receivers

September 16, 2024
Author(s)
Noah Schlossberger, Samuel Berweger, Nikunjkumar Prajapati, Andrew Rotunno, Alexandra Artusio-Glimpse, Matthew Simons, Abrar Sheikh, Eric Norrgard, Stephen Eckel, Christopher Holloway
Rydberg states of alkali atoms are highly sensitive to electric fields because their electron wavefunction has a large spatial extent, leading to large polarizabilities for static fields and large transition dipole moments for time-varying fields. Over the

Mapping Industrial Wireless Deployments onto Individual Use Cases

August 27, 2024
Author(s)
Mohamed Hany, Rick Candell
Industrial wireless is crucial for the vision of increased intelligence in industrial automation and enhanced connectivity in various industrial scenarios. Although general requirements are usually defined for deploying industrial wireless networks in

An Industrial Private 5G Testbed for Networked Automation Systems

August 22, 2024
Author(s)
Jing Geng, Mohamed Hany, Rick Candell
Interest in integrating wireless communication capabilities into industrial Cyber-Physical Systems (CPS) has surged recently. Driven by advantages like ease of deployment, reduced maintenance costs, and asset mobility, CPSs now employ wireless

Latency-Sensitive Networked Control Using 802.11ax OFDMA Triggering

August 22, 2024
Author(s)
Karl Montgomery, Mohamed Hany, Rick Candell
Orthogonal Frequency-Division Multiple Access (OFDMA) is a feature implemented in IEEE 802.11ax (Wi-Fi 6) that aims to improve performance by sending packets simultaneously to multiple users. This paper highlights performance issues when using OFDMA with a

5G NR and LTE Downlink Coexistence Measurements Using Software-Defined Radios

August 20, 2024
Author(s)
Nadia Yoza Mitsuishi, Yao Ma, Jason Coder
With the rapid deployment of 5G New Radio (NR) in the sub-6 GHz frequency bands, cellular operators need to accommodate this new technology within the limited spectrum licensed to them, mostly occupied by 4G Long-Term Evolution (LTE). This poses the

A Simulation Study of mmWave 5G-enabled Medical Extended Reality (MXR)

August 12, 2024
Author(s)
Tanguy Ropitault, Yongkang Liu, Richard Rouil, Mohamad Omar Al Kalaa
Medical extended reality (MXR) offers innovative healthcare delivery in a variety of clinical contexts. 5G-enabled MXR refers to the use of 5G connectivity to enable MXR functions by connecting multiple MXR device components, servers, and collaborators

Measurement-Based Prediction of mmWave Channel Parameters Using Deep Learning and Point Cloud

August 2, 2024
Author(s)
Anuraag Bodi, Raied Caromi, Jian Wang, Jelena Senic, Camillo Gentile, Hang Mi, Bo Ai, Ruisi He
Millimeter-wave (MmWave) channel characteristics are quite different from sub-6 GHz frequency bands. The major differences include higher path loss and sparser multipath components (MPCs), resulting in more significant time-varying characteristics in

Characterizing the Broadband RF Permittivity of 3D-Integrated Layers in a Glass Wafer Stack from 100 MHz to 30 GHz

July 30, 2024
Author(s)
Jacob Pawlik, Tomasz Karpisz, Nicholas Derimow, Sarah Evans, Jim Booth, Nate Orloff, Chris Long, Angela Stelson
We present a method for accurately determining the permittivity of dielectric materials in 3D integrated structures at broadband RF frequencies. With applications of microwave and millimeter-wave electronics on the rise, reliable methods for measuring the
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