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Search Publications by: Kate Remley (Fed)

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Displaying 126 - 150 of 222

Bit Error Rate Measurements in Reverberation Chambers using a VSA

June 21, 2010
Author(s)
Catherine A. Remley, Sander Floris, Christopher L. Holloway
We discuss practical measurement implementation issues regarding the use of a vector signal analyzer for making bit-error-rate measurements in reverberation chambers. These issues include synchronizing the transmitted and received signals in spite of time

Reverberation-Chamber Test Environment for Outdoor Urban Wireless Propagation Studies

June 21, 2010
Author(s)
Helge Fielitz, Kate Remley, Christopher L. Holloway, Qian Zhang, Qiong Wu, David W. Matolak
We introduce a test environment to replicate the well-known clustering of reflections in power delay profiles from urban wireless propagation environments that exhibit late-time delays and reflections. The test set-up combines discrete reflections

Identifying RF Identification Cards from Measurements of Resonance and Carrier Harmonics

May 27, 2010
Author(s)
Henry Romero, Kate Remley, Dylan Williams, Chih-Ming Wang, Timothy X. Brown
We show that careful measurements of the unloaded resonant frequency and quality factor of radio frequency identification proximity cards allow identification of different card models and, for the set of cards we studied, identification with minimal error

The Impact of Long-term Memory Effects on Diode Power Probes

May 15, 2010
Author(s)
Catherine A. Remley, Hugo Gomes, Alejandro Testera, Nuno B. Carvalho, Monica Barciela
This paper presents an analysis of long term memory effects on power measurements using diode power probes. It will be shown that a power probe calibrated with a single-tone sinusoidal excitation can provide erroneous values when used with modulated

Parametric Study on the use of Reverberation Chambers for Repeatable/Controllable Wireless Testing: Application to BER Measurements

April 12, 2010
Author(s)
Christopher L. Holloway, E Genender, Catherine A. Remley, John M. Ladbury, Galen H. Koepke
We illustrate use of the reverberation chamber to simulate different wireless propagation environments including effects such as narrowband or frequency-selective fading and Doppler spread. These effects have a strong impact on the quality of the wireless

Radio Wave Propagation Into Large Building Structures, Part 2: Characterization of Multipath

April 2, 2010
Author(s)
Catherine A. Remley, Galen H. Koepke, Christopher L. Holloway, Chriss A. Grosvenor, Dennis G. Camell, John M. Ladbury, Robert T. Johnk, William F. Young
We report on measurements that characterize multipath conditions that affect broadband wireless communications in building penetration scenarios. Measurements carried out in various large structures quantify both radio-signal attenuation and frequency

From the Editor's Desk: Where to Go

April 1, 2010
Author(s)
Catherine A. Remley
This is an Editorial for the April, 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).

Measurement Bandwidth Extension Using Multisine Signals: Propagation of Error

February 6, 2010
Author(s)
Catherine A. Remley, Dominique Schreurs, M. Myslinski, Dylan F. Williams
We describe a post-processing technique that can extend the effective measurement bandwidth of narrowband vector receivers by phase aligning overlapping measurements. The method requires only knowledge of the desired phases of a periodic, multisine

Comparison of Large-Signal-Network-Analyzer Calibrations

February 5, 2010
Author(s)
Dylan F. Williams, Catherine A. Remley, Joe Gering, Grand Aivazian
We develop a procedure and metrics for comparing large-signal-network-analyzer calibrations. The metrics we develop provide a bound on differences between measurements obtained from large-signal-network-analyzer calibrations, as well as more specific

From the Editor's Desk: Let's Have Some Fun

December 1, 2009
Author(s)
Catherine A. Remley
This is an Editorial for the December, 2009 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).

From the Editor's Desk: Why We Are Here

October 1, 2009
Author(s)
Catherine A. Remley
This is an Editorial for the October, 2009 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).

Outdoor-to-Indoor Channel Measurements and Models

September 1, 2009
Author(s)
Catherine A. Remley, Christopher L. Holloway, David W. Matolak
This document reports on wireless channel measurements and models for outdoor to indoor propagation environments. Although there have been a number of publications that have recently appeared on this topic, e.g., [1], [2], and references therein, the

Measurements to Support Public Safety Communications: Attenuation and Variability of 750 MHz Radio Wave Signals in Four Large Building Structures: NIST Technical Note 1552

August 7, 2009
Author(s)
William F. Young, Kate Remley, John M. Ladbury, Christopher L. Holloway, Chriss A. Grosvenor, Galen H. Koepke, Sander Floris, Wouter Numan, Andrea Garuti
In this report, we investigate radio communication problems faced by emergency responders (firefighters, police, and emergency medical personnel) in disaster situations. A fundamental challenge to radio communications into and out of large buildings is the

From the Editor's Desk: Diversity in Publications

August 1, 2009
Author(s)
Catherine A. Remley
This is an Editorial for the August, 2009 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).

Practical Applications of Nonlinear Measurements

June 12, 2009
Author(s)
Catherine A. Remley
We discuss the limitations of vector network analyzers in the measurement of nonlinear devices and circuits, including their inability to measure the relative phase between frequency components and the actual impedance in which a device is embedded. The