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Search Publications by: Jason Coder (Fed)

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Displaying 26 - 50 of 119

Characterizing LTE User Equipment Emissions Under Closed-Loop Power Control

April 6, 2021
Author(s)
Jason Coder, Aric Sanders, Michael R. Frey, Adam Wunderlich, Azizollah Kord, Jolene Splett, Lucas N. Koepke, Daniel Kuester, Duncan McGillivray, John M. Ladbury
This report presents a laboratory-based characterization of Long Term Evolution (LTE) User Equipment (UE) emissions under closed-loop power control, building on our prior work (NIST TN 2069), which assessed the impact of a large number of factors affecting

A Case Study of Medical Device Wireless Coexistence Evaluation

October 1, 2020
Author(s)
Mohamed Al-Kalaa, Joshua Guag, Seth Seidman, Yao Ma, Jason Coder
This article aims to provide a narrative for addressing wireless coexistence in medical devices to help medical device developers, test engineers, and regulatory affairs personnel throughout the device life cycle. Accordingly, we present a case-study

A Unified Analytical Approach to Multi-Cell LBT-Based Spectrum Sharing Systems

May 28, 2020
Author(s)
Yao Ma, Somayeh Mosleh, Jason B. Coder
Future unlicensed spectrum sharing scenarios involve multi-cell, multi-tier access of incumbent and emerging wireless systems, such as wireless local area network (WLAN), new-radio unlicensed (NR-U), and long-term evolution (LTE)with licensed assisted

Field Compressed Sensing

January 17, 2020
Author(s)
Anthony B. Kos, Fabio C. Da Silva, Jason B. Coder, Craig W. Nelson, Grace E. Antonucci, Archita Hati
Imaging solutions based on wave scattering seek real-time performance, high dynamic range, and spatial accuracy at scales spanning from nanometers to thousands of kilometers. Compressed sensing algorithms use sparsity to reduce sample size during image

Enhancing LAA Co-existence Using MIMO Under Imperfect Sensing

December 13, 2019
Author(s)
Somayeh Mosleh, Yao Ma, Jason B. Coder, Erik Perrins, Lingjia Liu
To meet the ever growing wireless network demands, in terms of subscribers and data throughput, operating long term evolution (LTE) in unlicensed bands, also known as license assisted access (LAA), is introduced as a promising solution. However, the LAA

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

LTE Handset Emissions: Radiation Pattern Measurements Final Test Report

August 16, 2019
Author(s)
Robert D. Horansky, Jason B. Coder, John M. Ladbury
The Defense Information Systems Agency (DISA) Defense Spectrum Organization (DSO) throughthe Spectrum Sharing Test and Development (SSTD) program proposed a National AdvancedSpectrum and Communications Test Network (NASCTN) measurement campaign to

Probability of Coexistence of LTE-LAA and WLAN Systems Based on Delay Constraints

July 29, 2018
Author(s)
Yao Ma, William Young, Eric W. Anderson, Jason Coder
To support efficient spectrum sharing and related standardization efforts in unlicensed spectrum, it is important to develop analytical tools to accurately quantify coexistence performance between long-term evolution license assisted access (LTE-LAA) and

On the Susceptibility of Coded OFDM to Interference: A Simulation Study

January 3, 2018
Author(s)
Jason Coder, Yao Ma
The susceptibility of broadband wireless communications signals (e.g., LTE, IEEE 802.11) to interference has been a topic of significant research. In this paper, we implement a simulation-based study on the impact interference can have on the bit error