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Search Publications by: Kate Remley ()

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Displaying 51 - 75 of 222

Bringing Precision to 5G Test: Activities in the U.S.

April 9, 2018
Author(s)
Catherine A. Remley, Maria G. Becker
(Workshop Abstract) The next generation (5G) network won’t just deliver much faster connection and higher data capacity. It also promises to provide reliable connectivity, low energy consumption, and connecting billions of people and trillions of things

Spatial Channels for Wireless Over-the-Air Measurements in Reverberation Chambers

April 9, 2018
Author(s)
Maria G. Becker, Rob Horansky, Damir Senic, Vincent T. Neylon, Kate Remley
NIST is developing a hybrid test chamber for over-the-air characterization of the next generation of wireless devices in spatial channel environments. By combining features of both reverberation and anechoic chambers, the hybrid chamber will produce

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

Estimating and Correcting the Device-Under-Test Transfer Function in Loaded Reverberation Chambers for Over-the-Air Tests

December 1, 2017
Author(s)
Catherine A. Remley, Ryan J. Pirkl, Chih-Ming Wang, Damir Senic, Arvand Homer, Matt V. North, Maria G. Becker, Robert D. Horansky, Christopher L. Holloway
We assess the potential error in measurements of the power transfer function corresponding to a reverberation chamber set-up when different antenna types are used for the reference and DUT measurements. We derive a mathematical description of the transfer

NIST Channel Sounder Overview and Channel Measurements in Manufacturing Facilities

November 8, 2017
Author(s)
Jeanne T. Quimby, Richard Candell, Catherine A. Remley, David R. Novotny, Joseph Diener, Peter B. Papazian, Alexandra Curtin, Galen H. Koepke
Manufacturers are increasingly choosing wireless platforms to replace wired ones due to their ease of installation, upgrade, and reconfigurability. Reliable and secure real-time performance of wireless platforms is technically challenging because wireless

The Role of Filtering Higher Order Reflections in Antenna Extrapolation Measurements

September 30, 2017
Author(s)
Rob Horansky, Mohit S. Mujumdar, Dylan Williams, Kate Remley, David R. Novotny, Michael H. Francis
With more and more wireless devices being made with no test ports, and with the need to test these devices in real-world scenarios with no cable interference, over-the-air (OTA) testing has been dominating the test and manufacture industry. At NIST, we are

Methods for Channel Sounder Measurement Verification

September 23, 2017
Author(s)
Kate Remley, Camillo Gentile, Alenka Zajic, Jeanne Quimby
We describe an activity of the 5G mmWave Channel Sounder Alliance to verify the hardware performance of channel sounders operating at mmWave frequencies. Such verification procedures are critical when attempting to compare data from sounders having

Measurement Challenges for 5G and Beyond

July 14, 2017
Author(s)
Catherine A. Remley, Jeffrey A. Jargon, Joshua A. Gordon, Alexandra E. Curtin, David R. Novotny, Christopher L. Holloway, Robert D. Horansky, Michael S. Allman, Jeanne T. Quimby, Camillo A. Gentile, Peter B. Papazian, Ruoyu Sun, Damir Senic, Jelena Senic, Matthew T. Simons, Maria G. Becker, Dylan F. Williams, Richard A. Chamberlin, Jerome G. Cheron, Ari D. Feldman, Paul D. Hale, Mohit S. Mujumdar, Nada T. Golmie
National Metrology Institutes (NMIs) around the world are charged with supporting industry through improved measurement science and by providing a traceability path to fundamental physical standards. Mobile wireless communications have become a ubiquitous

Channel Sounder Measurement Verification and Uncertainty

June 2, 2017
Author(s)
Catherine A. Remley, Jeanne T. Quimby, Paul D. Hale, Dylan F. Williams, Jeffrey A. Jargon, Rodney W. Leonhardt
This presentation describes channel-sounder measurement verification procedures including options such as comparing measurements to theory, conducted tests of a known, simulated-channel artifact, direct over-the-air comparison to a vector network analyzer

Industrial Wireless Systems: Radio Propagation Measurements

January 30, 2017
Author(s)
Richard Candell, Catherine A. Remley, Jeanne T. Quimby, David R. Novotny, Alexandra Curtin, Peter B. Papazian, Galen H. Koepke, Joseph Diener, Mohamed T. Hany
Radio frequency (RF) propagation measurements were conducted at three facilities representing a cross-section of different classes of industrial environments. Selected sites included a multi-acre transmission assembly factory typical of the automotive

Measurement of Wireless Devices in Reverberation Chambers

December 7, 2016
Author(s)
Catherine A. Remley
When the antenna is integrated into the body of a wireless device, as it is for cell phones and many other portable devices, performance testing is typically done under free-field conditions. In this overview presentation, we will discuss free-field

Pathloss Models for Indoor Hotspot Deployment at 83.5 GHz

December 3, 2016
Author(s)
Camillo Gentile, Jelena Senic, Peter B. Papazian, Jae-Kark Choi, Kate Remley
Conventional pathloss models are based on the received power from an omnidirectional antenna. Millimeter-wave receivers, conversely, will feature highly directional antennas that can be steered towards the angle with maximum power, exploiting their high

A Tetherless, Absolute-Time Channel Sounder, Processing, and Results for a Complex Environment

November 4, 2016
Author(s)
David R. Novotny, Alexandra E. Curtin, Catherine A. Remley, Peter B. Papazian, Jeanne T. Quimby, Richard Candell
we present a channel sounder that can operate without a tether and still maintain an absolute time reference between the source and receiver. Based on a sliding correlator, with synchronized rubidium clocks to generate phase references for the up- and down

Using Absorption Cross Section to Predict Coherence Bandwidth and other Characteristics of a Reverberation Chamber Set-up for Wireless System Tests

October 3, 2016
Author(s)
Catherine A. Remley, Jos Dortmans, Damir Senic, Chih-Ming Wang, Christopher L. Holloway
We present a method to predict the coherence bandwidth, delay spread and power transfer function of a reverberation chamber set-up. The method is based on the absorption cross section of the absorbing material that is added to the chamber. With an S

Configuring and Verifying Reverberation Chambers for Testing Cellular Wireless Devices

April 21, 2016
Author(s)
Catherine A. Remley, Jos N. Dortmans, Catherine Weldon, Thomas B. Meurs, Chih-Ming Wang, Christopher L. Holloway, Perry F. Wilson
Reverberation chambers provide a repeatable test environment for laboratory over-the-air testing and represent a viable solution for testing large-form-factor wireless devices. Such tests often involve “imperfect chamber” configurations in which the

Estimating and Reducing Uncertainty in Reverberation-Chamber Characterization at Millimeter-Wave Frequencies

April 20, 2016
Author(s)
Damir Senic, Catherine A. Remley, Chih-Ming Wang, Dylan F. Williams, Christopher L. Holloway, Diogo Ribeiro, Ansgar T. Kirk
This contribution provides techniques for accurately characterizing the measurement uncertainty due to chamber setup for total radiated power measurements at millimeter-wave frequencies. The setup is based on the reverberation chamber as a well-known

Large-Signal-Network-Analyzer Round Robin

February 1, 2016
Author(s)
Dylan F. Williams, Paul D. Hale, Catherine A. Remley, Gustavo Avolio, Dominique Schreurs, Diogo C. Ribeiro, Pawel Barmuta, Gian Piero Gibiino, Mohammad Rajabi, Arkadiusz Lewandowski, Jaros?aw Szatkowski, Kuangda Wang
This paper describes tests of the calibration-comparison method as an approach to assessing the measurement accuracy of large-signal network analyzer calibrations. We show that having one trusted reference calibration allows the calibration accuracy of the