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Search Publications by: Kate Remley (Fed)

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Displaying 101 - 125 of 222

MIMO Capacity in 2-D and 3-D Isotropic Environments

May 21, 2013
Author(s)
Ryan J. Pirkl, Catherine A. Remley
We analyze the distribution of MIMO channel capacity for different antennas in 2-D and 3-D statistically isotropic environments. These represent possible test environments that may be generated by multi-probe anechoic and reverberation chambers

Test Methods for RF-Based Electronic Safety Equipment

January 4, 2013
Author(s)
Catherine A. Remley, William F. Young
We describe the development of free-field test methods for wireless electronic safety equipment that replicate field-test conditions in a laboratory environment. The test methods can be used to verify the performance of wireless devices, such as those used

Antenna-Environment Multiple Scattering in Reverberation Chamber Measurements

December 12, 2012
Author(s)
Ryan J. Pirkl, Catherine A. Remley
High-resolution synthetic aperture measurements in a reverberation chamber revealed the presence of multiple scattering between the scan antenna and the measurement environment. Casting the scan antenna-environment multiple scattering as an error term with

Sequential Estimation of Timebase Corrections for an Arbitrarily Long Waveform

October 1, 2012
Author(s)
Chih-Ming Wang, Paul D. Hale, Jeffrey A. Jargon, Dylan F. Williams, Catherine A. Remley
We present a procedure for correcting the timebase distortion and jitter of temporal waveforms of arbitrary lengths. This is achieved by estimating the timebase distortion and jitter sequentially with overlapping measurements and using the information in

Early-time Behavior in Reverberation Chambers and Its Effect on the Relationships Between Coherence Bandwidth, Chamber Decay Time, RMS Delay Spread, and the Chamber Build-up Time

August 12, 2012
Author(s)
Christopher L. Holloway, Haider Shah, Ryan J. Pirkl, Catherine A. Remley, David A. Hill, John M. Ladbury
The use of reverberation chambers for electromagnetic testing is widely being accepted for use in many measurement applications. In recent years reverberation chambers are beginning to merge as a test facility for testing wireless device and for emulating

Reverberation Chamber Measurement Correlation

June 15, 2012
Author(s)
Ryan J. Pirkl, Catherine A. Remley, Christian S. Lotback Patane
This contribution evaluates the utility of several different metrics for studying reverberation chamber measurement correlation. Metrics considered are the autocovariance, the correlation matrix, and two metrics based upon the entropy of the data

From the Editor's Desk: Happy Trails

November 15, 2011
Author(s)
Catherine A. Remley
Abstract: This is an Editorial for the December, 2011 issue of IEEE Microwave Magazine. Kate Remley writes about items of interest to the Microwave Theory and Techniques Society (MTT-S).

Structural and Electromagnetic Scenarios for Firefighter Locator Tracking Systems

September 1, 2011
Author(s)
Anthony D. Putorti Jr., Francine K. Amon, Kathryn M. Butler, Catherine A. Remley, William F. Young, Christina Spoons
One of the most important aspects of effective firefighter response to an emergency event is awareness of the location of the firefighters involved, especially in cases with limited visibility due to darkness, heavy smoke, or unfamiliar and changing

Interference Tests for 900 MHz Frequency-Hopping Public-Safety Wireless Devices

August 15, 2011
Author(s)
Catherine A. Remley, Michael R. Souryal, William F. Young, Daniel G. Kuester, David R. Novotny, Jeffrey R. Guerrieri
We discuss free-field measurement methods designed to quantify interference between wireless devices such as RF identification systems and RF-based emergency beacons used by fire fighters. For public safety applications, standardized testing is important

Simulation of a MIMO System in a Reverberation Chamber

August 15, 2011
Author(s)
Helge Fielitz, Kate Remley, Christopher L. Holloway
We present a general method to test MIMO antenna setups and algorithms in a reverberation chamber. Our test set-up enables measurement of data throughput using standard laboratory instruments. Using this test set up, effects of antenna setups and/or post

Static and Dynamic Propagation-Channel Impairments in Reverberation Chambers

August 15, 2011
Author(s)
Catherine A. Remley, Sander Floris, Christopher L. Holloway, Scott Prather
We study the separate and combined effects of static and dynamic multipath channels created in a reverberation chamber on bit-error-rate measurements of digitally modulated signals. We demonstrate measurement methods to identify individually both static

Radio Frequency Measurements to Support Public Safety Wireless Communications in Large Buildings and Structures

June 13, 2011
Author(s)
William F. Young, Catherine A. Remley, Christopher L. Holloway, Galen H. Koepke, Dennis G. Camell, John M. Ladbury
The public safety community requires dependable wireless communications in buildings that often disrupt the radio frequency propagation due to the construction material, architectural features, or large physical dimensions. Here we introduce measurements

From the Editor's Desk: Communication is Vital

May 5, 2011
Author(s)
Catherine A. Remley
This is an Editorial for the June, 2011 issue of IEEE Microwave Magazine. Kate Remley, the Editor-in-Chief, writes about timely topics for the members of the Microwave Theory and Techniques Society (MTT-S).

Diode Power Probe Measurements of Wireless Signals

April 15, 2011
Author(s)
Catherine A. Remley, Hugo Gomes, Alejandro Testera, Nuno B. Carvalho, Monica Barciela
A new view of diode power probes is presented is this paper. It is shown analytically, by simulations and with measurements, that calibration procedures for diode power probes should be rethought when measuring new wireless standard type of signals. In

Measurements and Models for the Wireless Channel in a Ground-Based Urban Setting in Two Public Safety Frequency Bands

January 20, 2011
Author(s)
William F. Young, Catherine A. Remley, David W. Matolak, Qian Zhang, Christopher L. Holloway, Chriss A. Grosvenor, Camillo A. Gentile, Galen H. Koepke, Qiong Wu
We report on measured peer-to-peer (ground-based) wireless channel characteristics for an urban environment in two public safety frequency bands. Results are based upon measurements taken in Denver in June 2009. The public safety bands we investigated are

From the Editor's Desk: A Little Friendly Competition

December 1, 2010
Author(s)
Catherine A. Remley
This is an Editorial for the December, 2010 issue of IEEE Microwave Magazine. Kate Remley, the Editor-in-Chief, writes about timely topics for the members of the Microwave Theory and Techniques Society (MTT-S).

A Channel Propagation Model for the 700 MHz Band

September 1, 2010
Author(s)
Camillo A. Gentile, Nada T. Golmie, Catherine A. Remley, Christopher L. Holloway, William F. Young
Conversion from analog television in the United States combined with the appeal for broadband public safety communications is generating a lot of interest in the so-called 700 MHz band between 698-806 MHz. To our knowledge, no channel propagation model for

From the Editor's Desk: Re-Visioning Reviews

August 1, 2010
Author(s)
Catherine A. Remley
This is an Editorial for the August, 2010 issue of IEEE Microwave Magazine. Kate Remley, the Editor-in-Chief, writes about timely topics for the members of the Microwave Theory and Techniques Society (MTT-S).

Examining the True Effectiveness of Loading a Reverberation Chamber

July 29, 2010
Author(s)
Jason Coder, John M. Ladbury, Christopher L. Holloway, Kate Remley
In this paper we explore how placing the same amount of absorber in different locations within a reverberation chamber can have different loading effects. This difference can have a significant impact on measurement reproducibility, both for measurements