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Advanced communications

Wireless (RF)

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Displaying 26 - 50 of 1204

Wireless Deployment Challenges in Construction: A 5G Strategy

May 20, 2024
Author(s)
Richard Candell, Mohamed Hany, Jing Geng, Karl Montgomery
In the construction context, integrating 5G networks presents numerous challenges. Tiis article explores deploying wireless communication networks within construction projects, introducing a comparison approach to assess deployment difficulty at each

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

May 8, 2024
Author(s)
Noah Schlossberger, Nik Prajapati, Samuel Berweger, Andrew Rotunno, Aly Artusio-Glimpse, Abrar Sheikh, Eric Norrgard, Christopher L. Holloway, Stephen Eckel
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

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

May 8, 2024
Author(s)
Noah Schlossberger, Nik Prajapati, Samuel Berweger, Aly Artusio-Glimpse, Matt Simons, Abrar Sheikh, Andrew Rotunno, Eric Norrgard, Stephen Eckel, Christopher L. 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

Independent Rydberg atom sensing using a dual-ladder scheme

May 2, 2024
Author(s)
Samuel Berweger, Alexandra Artusio-Glimpse, Nikunjkumar Prajapati, Andrew Rotunno, Noah Schlossberger, Dangka Shylla, kaitlin moore, Matthew Simons, Christopher Holloway
Rydberg atom-based electric field sensing can provide all-optical readout of radio frequency fields in a dielectric environment. However, because a single set of optical fields is typically used to prepare the Rydberg state and read out its response to RF

AI-Based Environment Segmentation Using a Context-Aware Channel Sounder

April 26, 2024
Author(s)
Anuraag Bodi, Samuel Berweger, Raied Caromi, Jihoon Bang, Jelena Senic, Camillo Gentile
We describe how the data acquired from the camera and Lidar systems of our context-aware radio-frequency (RF) channel sounder is used to reconstruct a 3D mesh of the surrounding environment, segmented and classified into discrete objects. First, the images

Context-Aware Channel Sounder for AI-Assisted Radio-Frequency Channel Modeling

April 26, 2024
Author(s)
Camillo Gentile, Jelena Senic, Anuraag Bodi, Samuel Berweger, Raied Caromi, Nada Golmie
We describe a context-aware channel sounder that consists of three separate systems: a radio-frequency system to extract multipaths scattered from the surrounding environment in the 3D geometrical domain, a Lidar system to generate a point cloud of the

Empirical Characterization of Doppler in Industrial Wireless Channels

April 16, 2024
Author(s)
Dreyelian Morejon, Jon Montalban, Eneko Iradier, Mohamed Hany, Rick Candell, Pablo Angueira
This paper analyzes the temporal variation of the radio propagation channel in industrial environments. The results have been obtained by processing empirical data from the National Institute of Standards and Technology (NIST) in a field measurement

Cyclostationary Channel Power Measurements for CBRS Coexistence Assessment

March 31, 2024
Author(s)
Dan Kuester, Anthony Romaniello, PETER MATHYS
We present a compressive approach for channel power measurements in coexistence scenarios involving heterogeneous cyclostationary channel usage and an example application in the Citizens Broadband Radio Service (CBRS) band. The method leverages known cycle

Rapid Automated Antenna Alignment on Robotic Antenna Ranges

March 17, 2024
Author(s)
Benjamin Moser, Joshua Gordon
We present methods to automate AUT-probe alignment on a robotic antenna range using iterative fitting methods. Data collected during pose refinement is used to characterize offsets to the robot motion frame and the end effector measurement frame with

Increased instantaneous bandwidth of Rydberg atom electrometry with an optical frequency comb probe

February 27, 2024
Author(s)
Aly Artusio-Glimpse, David Long, Sean Bresler, Nik Prajapati, Dangka Shylla, Andrew Rotunno, Matt Simons, Samuel Berweger, Noah Schlossberger, Thomas W. LeBrun, Christopher L. Holloway
We show that the use of a probe optical frequency comb leads to dramatically improved bandwidth (as high as 12+/-1 MHz) for the detection of modulated radio frequencies in Rydberg atom-based electrometry.

A Characterization of OFDMA Uplink Activation for Industrial Applications

February 5, 2024
Author(s)
Karl Montgomery, Rick Candell
This report serves to determine how Orthogonal Frequency Division Multiple Access (OFDMA) is triggered in commercial IEEE 802.11ax (Wi-Fi 6) access points for industrial application scenarios. It presents an overview of OFDMA and how it works in IEEE 802

Towards Opportunistic Radar Sensing Using Millimeter-wave WiFi

January 1, 2024
Author(s)
Jian Wang, Jack Chuang, Samuel Berweger, Camillo Gentile, Nada T. Golmie
Sensing with communication waveforms has drawn growing interest thanks to the ubiquitous availability of wireless networks. However, the required sensing resources may not always be available in a communication system. In addition, the communication system

ATIC: Automated Testbed for Interference Testing in Communication Systems

December 25, 2023
Author(s)
Michelle Pirrone, Keith Forsyth, Jordan Bernhardt, Dan Kuester, Aric Sanders, Duncan McGillivray, Adam Wunderlich
The proliferation of communication devices and systems has led to increasingly complex and dynamic spectral environments. This greatly impacts the operations of a multitude of organizations, including commercial entities, academic and non-commercial

Robotic Antenna Measurements

December 11, 2023
Author(s)
Josh Gordon
Robots excel at manipulating objects with 6 degree of freedom movement. A combination of well-defined kinematics, optimized control loops, and robust mechanical architecture make robots a versatile and capable platform for a range of applications where

Robust Measurements for RF Fingerprinting with Constellation Patterns of Radiated Waveforms

November 20, 2023
Author(s)
Ameya Ramadurgakar, Jake Rezac, Lennart Heijnen, Kate Remley, Dylan Williams, MELINDA PIKET-MAY, Rob Horansky
We introduce a type of RF fingerprint for nondestructive, cellular device identification. The new fingerprinting algorithm, termed Eigenphones, is a data-driven technique based on a singular value decomposition of a user equipment's symbol-constellation

Closed-loop quantum interferometry for phase-resolved Rydberg-atom field sensing

November 3, 2023
Author(s)
Samuel Berweger, Alexandra Artusio-Glimpse, Andrew Rotunno, Nikunjkumar Prajapati, Joseph Christesen, Kaitlin Moore, Matthew Simons, Christopher Holloway
Although Rydberg atom-based electric field sensing provides key advantages over traditional antenna-based detection, it remains limited by the need for a local oscillator (LO) for low-field and phase resolved detection. In this work, we demonstrate the

Energy-Efficient Access Point Deployment for Industrial IoT Systems

October 26, 2023
Author(s)
Xiaowen Qi, Jing Geng, Mohamed Hany, Shuvra Bhattacharyya, Rick Candell
Internet of Things (IoT) technologies have impacted many fields by opening up much deeper and more extensive integration of communications connectivity, sensing, and embedded processing. The industrial sector is among the areas that have been impacted

Dynamic Range by Design in OTA EVM measurements

October 17, 2023
Author(s)
Paritosh Manurkar, Dan Kuester, Joshua Kast, Rob Horansky
We present an experimental approach to design an over-the-air (OTA) millimeter-wave measurement of error vector magnitude (EVM) and associated uncertainties that include correlations and nonlinearities. Our approach uses a waveguide-variable attenuator at

Industrial Wireless Cyberphysical Systems Performance Using Deep Learning

September 28, 2023
Author(s)
Mohamed Hany, Rick Candell, Karl Montgomery
Industrial wireless communications networks have a major role in the future industrial cyber-physical systems (CPSs) to have higher flexibility and massive machine connectivity. However, the impact of the industrial wireless on the reliability and latency
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