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NIST Authors in Bold

Displaying 451 - 475 of 1195

Unsupervised Clustering for Millimeter-Wave Channel Propagation Modeling

February 11, 2018
Author(s)
Jian Wang, Camillo Gentile, Jelena Senic, Roy Sun, Peter B. Papazian
We have designed and assembled millimeter-wave channel sounders at 28, 60, and 83 GHz. They can measure the three-dimensional (azimuth and elevation) double-directional angle (angle-of- departure and angle-of-arrival) of channel multipath components as

Future Generation Wireless R&D Gaps Report

February 5, 2018
Author(s)
Nada T. Golmie
This report identifies and describes several of the most significant gaps within various components of the wireless industry. This report is intended to serve solely as a knowledge product that recognizes the major challenges facing the broader research

Increasing Public Safety Broadband Network Resiliency Through Traffic Control

February 1, 2018
Author(s)
Richard A. Rouil, Wesley D. Garey, Camillo A. Gentile, Nada T. Golmie
Long Term Evolution (LTE)-based cellular networks are being deployed around the world to provide public safety with enhanced capabilities and access to broadband technology. In the United States, the First Responder Network Authority (FirstNet) is on the

Identifying spurious modes in RF-MEMS resonators using photoelastic imaging

January 21, 2018
Author(s)
Vikrant J. Gokhale, Jason J. Gorman
This paper reports the first use of dynamic photoelastic imaging for identifying in-plane vibration modes in high-frequency MEMS resonators. In a set of width-extensional mode resonators (WE-BARs), we map fundamental width-extensional modes and unwanted

A NIST Testbed Approach to Verifying mmWave Wireless Communication Signals

January 18, 2018
Author(s)
Catherine A. Remley, Dylan F. Williams, Robert D. Horansky
This presentation discusses NIST methods for providing traceable modulated signals at microwave and millimeter-wave frequencies in both conducted and free-field environments. It was presented at the 3rd NSF mmWave Research Coordination Network Workshop in

Measured Emission Spectra of Selected AWS-3 LTE Transmitters

January 16, 2018
Author(s)
Michael R. Frey, Geoffrey Sanders, Jolene Splett, John M. Ladbury, Frank Sanders, Azizollah Kord, Ryan T. Jacobs
Version three of Advanced Wireless Services (AWS-3) radio systems will soon use spectrum that is adjacent to bands currently used by airborne telemetry links at U.S. government test and training ranges (TTRs). It is possible that out-of-band (OoB) and

Qualitative Multidimensional Calibration Comparison

January 15, 2018
Author(s)
Aric W. Sanders, Ronald A. Ginley, Christian J. Long, Jasper A. Drisko, Nathan D. Orloff, Richard A. Chamberlin
We present a technique for the visual comparison of any two vector network analyzer calibrations. This method visualizes the comparative action of the calibrations for multiple complex scattering parameters relative to the calibrated measurement plane

Enhanced Transmission Algorithm for Dynamic Device-to-Device Direct Discovery

January 12, 2018
Author(s)
Aziza Ben Mosbah, David W. Griffith, Richard A. Rouil
In order to support the increasing demand for capacity in cellular networks, Long Term Evolution (LTE) introduced Proximity Services (ProSe) enabling Device-to-Device (D2D) communications, defining several services to support such networks. We are

On the Impacts of In-Band LTE Emissions

January 3, 2018
Author(s)
Azizollah Kord
Abstract—With the introduction of low-power internet of things (IoT) and device to device (D2D) communications in the long time evolution (LTE) system protocol, the in-band interference from other user equipment (UE) with higher power requires special

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

Dynamic Spectrum Access Algorithms Based on Survival Analysis

December 20, 2017
Author(s)
Timothy Hall, Anirudha Sahoo, Robert C. Hagwood, Sarah B. Streett
In this study, we design and implement two algorithms for dynamic spectrum access (DSA) that are based on survival analysis. They use a non-parametric estimate of the cumulative hazard function to predict the remaining idle time available for secondary
Displaying 451 - 475 of 1195
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