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Advanced communications

Wireless (RF)

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Displaying 176 - 200 of 637

Wireless User Requirements for the Factory Workcell

October 2, 2019
Author(s)
Karl Montgomery, Richard Candell, Yongkang Liu, Mohamed Hany
Wireless communication is becoming crucial to advanced manufacturing. Industry 4.0 and Smart Manufacturing depend on networked industrial automation systems. The term Industrial Internet of Things (IIoT) has been used to describe the deployment of

Characterizing LTE User Equipment Emissions: Factor Screening

September 30, 2019
Author(s)
Jason Coder, Adam Wunderlich, Michael R. Frey, Paul T. Blanchard, Dan Kuester, Azizollah Kord, Max Lees, Aric Sanders, Jolene Splett, Lucas N. Koepke, Rob Horansky, Duncan McGillivray, John M. Ladbury, Jeffrey T. Correia, Venkatesh Ramaswamy, Jerediah Fevold, Shawn Lefebre, Jacob K. Johnson, John Carpenter, Mark Lofquist, Keith Hartley, Melissa Midzor
Characterizations of long-term evolution (LTE) user equipment (UE) emissions are a key ingredient in models of interference between wireless cellular networks and other systems that must use the same radio frequency spectrum. This report presents (i) a

A demonstration of Low Power Wide Area Networking for city-scale monitoring applications

September 25, 2019
Author(s)
Sebastian Barillaro, Dhananjay Anand, Avi Gopstein, Julian Barillaro
Networks of sensors are key components of an Internet of Things. This paper outlines a demonstration of a wireless technology called LoRa/LoRaWAN that may be used to network sensors over a range of several kilometers. LoRa is an example of a Low Power Wide

Applications with a Rydberg Atom-based Radio Frequency Antenna/Receiver

September 2, 2019
Author(s)
Matthew T. Simons, Abdulaziz H. Haddab, Joshua A. Gordon, Christopher L. Holloway
We discuss several recent extensions of quantum radio frequency (RF) electric field sensors to antenna/receiver applications. These Rydberg atom-based sensors have been previously studied for SI-traceable RF field measurements. We demonstrate the reception

The Effect of Peripheral Equipment Loading on Reverberation-Chamber Metrics

September 1, 2019
Author(s)
Anouk Hubrechsen, Laurens A. Bronckers, Kate Remley, Rob Jones, Rob Horansky, Ad Reniers, Anne Roc'h, Bart Smolders
Measuring wireless devices in a reverberation chamber often requires ancillary equipment to be present in the chamber. This paper illustrates the effect of their presence on metrics that are important in wireless device tests, such as chamber decay time

A Classification Scheme for Wireless Channel Models Across the Development Life Cycle

July 12, 2019
Author(s)
David Michelson, Camillo Gentile, Nada T. Golmie, Jeanne Quimby, Kate Remley, Ken Gracie, Yvo de Jong
Wireless channel models play a critical role at all stages of the product life cycle, from standards development to network deployment. However, the distinctive needs and requirements for the channel models used at each stage of the cycle are rarely

Machine Learning in a Quality Managed RF Measurement Workflow

July 6, 2019
Author(s)
Aric Sanders, John Bass, Arpita Bhutani, Mary A. Ho, Jim Booth
Advances in artificial intelligence, or more specifically machine learning, have made it possible for computers to recognize patterns as well or better than humans. The process of quality management in radio-frequency measurements is an arduous one that

62.5-GHz Phased-Array Channel Sounder for Double-Directional Angle Estimation

July 1, 2019
Author(s)
Peter B. Papazian, Derek Caudill, Camillo Gentile, Jack Chuang, Nada T. Golmie
The paper describes implementation of phased array antennas for use in a wideband channel sounding system. The antennas are 62.5 GHz prototypes, utilizing SiGe chips on a printed circuit-board. Each board consists of two 16-element series-fed patch array

Omnidirectional Channel Sounder with Phased-Array Antennas for 5G Mobile Communications

June 30, 2019
Author(s)
Derek Caudill, Peter B. Papazian, Camillo Gentile, Jack Chuang, Nada T. Golmie
We describe a 60-GHz channel sounder with phased-array antennas and 1-GHz bandwidth. It estimates the angle of departure (AoD)/angle of arrival (AoA) of channel multipath components (MPCs) by sweeping the antenna space of the transmitter/receiver through 5

Design Space Exploration for Wireless-Integrated Factory Automation Systems

June 10, 2019
Author(s)
Jing Jeng, Honglei Li, Yongkang Liu, Mohamed Hany, Rick Candell, Shuvra Bhattacharyya
Recent years have brought significantly increased interest in integrating wireless communication capabilities within factory automation systems. Such integration motivates the study of interactions among the physical layout of factory workcells, wireless

A SysML Representation of the Wireless Factory Work-cell

June 6, 2019
Author(s)
Richard Candell, Mohamed T. Hany, Yongkang Liu, Sebti Foufou
Smart Manufacturing, also known as Industry 4.0, provides a vision of future manufacturing systems that incorporate highly dynamic physical systems, robust and responsive communications systems, and computing paradigms to maximize efficiency, enable

Large-Signal Network Analysis for Over-the-Air Test of Up-Converting and Down-Converting Phased Arrays

June 1, 2019
Author(s)
Alec Weiss, Dylan Williams, Jeanne Quimby, Rod Leonhardt, Thomas Choi, Zihang Chen, Kate Remley, andreas Molisch, Ben Jamroz, Jake Rezac, Peter Vouras
We explore large-signal network analysis for the over-the-air test of up-converting and down-converting phased arrays. The approach first uses a vector network analyzer to calibrate the impulse response of an over-the-air test system at RF. The vector
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