U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by: Paul D. Hale (Fed)

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 26 - 50 of 116

Calibration of channel mismatch in time-interleaved real-time digital oscilloscopes

May 22, 2015
Author(s)
Jeffrey A. Jargon, Paul D. Hale, Peter J. Jeavons, John B. Schlager, Andrew M. Dienstfrey, Joo-Gwang Lee, Chihyun Cho
A novel method is proposed for the calibration of channel mismatch in a time-interleaved real- time digital oscilloscope (RTDO). The method only requires a transfer function of time- interleaved ADCs (TIADCs), and also proposes measurement schemes of the

Rectangular-Waveguide Impedance

May 22, 2015
Author(s)
Dylan F. Williams, Jeffrey A. Jargon, Uwe Arz, Paul D. Hale
We discuss the role of the wave impedance in temporal measurements in rectangular waveguide and present a simple rule-of-thumb for estimating the difference of the temporal electric and magnetic field waveforms supported by the dominant TE10 mode. We also

Millimeter-Wave Modulated-Signal and Error-Vector-Magnitude Measurement With Uncertainty

May 1, 2015
Author(s)
Catherine A. Remley, Dylan F. Williams, Paul D. Hale, Chih-Ming Wang, Jeffrey A. Jargon, Youngcheol Park
We provide techniques to generate and characterize precision wideband millimeter-wave modulated signals. We use predistortion to obtain a significant improvement in signal quality and an associated reduction in the error vector magnitude (EVM) of the

A Compact Millimeter-wave Multisine Generator for Calibrating Broadband Vector Receivers

April 30, 2015
Author(s)
Paul D. Hale, Kate Remley, Dylan Williams, Jeffrey Jargon, Chih-Ming Wang
We propose a compact and low cost waveform source that can be used to calibrate the magnitude and phase response of vector receivers over a bandwidth as large as a few gigahertz. The generator consists of a broadband comb generator followed by a filter and

Parameter Estimation and Uncertainty Evaluation in a Low Rician K-Factor Reverberation-Chamber Environment

October 15, 2014
Author(s)
Chih-Ming Wang, Catherine A. Remley, Ansgar T. Kirk, Ryan J. Pirkl, Christopher L. Holloway, Dylan F. Williams, Paul D. Hale
In this paper we study statistical methods for estimating the Rician K-factor when this parameter is small. A fiducial approach for making statistical inference on the K-factor is discussed. The approach requires a Monte Carlo method to compute the

Colored Noise and Regularization Parameter Selection for Waveform Metrology

July 8, 2014
Author(s)
Andrew M. Dienstfrey, Paul D. Hale
We study six regularization parameter selection algorithms applied to deconvolution problems relevant for characterization of high-speed communication measurement systems. In particular we investigate the performance of these selectors in the presence of

Characterizing a Noninsertable Directional Device Using the NIST Uncertainty Framework

June 6, 2014
Author(s)
Jeffrey A. Jargon, Dylan F. Williams, Paul D. Hale, Michael D. Janezic
We characterize and provide uncertainties for a noninsertable, directional device over a frequency range of 90 to 100 GHz using the NIST Microwave Uncertainty Framework in conjunction with a commercial vector network analyzer. Our device consists of a

Analysis for Dynamic Metrology

January 30, 2014
Author(s)
Andrew M. Dienstfrey, Paul D. Hale
Diverse measurement contexts require estimates of time varying quantities. Ideally the measurement device responds to signal variations significantly more rapidly than the modulation of the signal itself. If so, then well-developed techniques may be used

The Impact of Characteristic Impedance on Waveform Calibrations

June 7, 2013
Author(s)
Dylan F. Williams, Jeffrey A. Jargon, Paul D. Hale
We examine the impact of the characteristic impedance on mismatch corrections for temporal waveform calibrations based on high-speed electro-optic sampling measurements. We show that failing to measure and account for the characteristic impedance of

The Impact of Characteristic Impedance on Waveform Calibrations

June 7, 2013
Author(s)
Dylan F. Williams, Jeffrey A. Jargon, Paul D. Hale
We examine the impact of the characteristic impedance on mismatch corrections for temporal waveform calibrations based on high-speed electro-optic sampling measurements. We show that failing to measure and account for the characteristic impedance of

A Precision Millimeter-Wave Modulated-Signal Source

June 6, 2013
Author(s)
Catherine A. Remley, Paul D. Hale, Dylan F. Williams, Chih-Ming Wang
We develop and characterize a modulated-signal source for use at millimeter-wave frequencies. Components within the source are phase locked by a 10 GHz reference source to minimize drift and improve synchronization. The complex frequency response of the

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

Traceability of high-speed electrical waveforms at NIST, NPL, and PTB

July 6, 2012
Author(s)
Paul D. Hale, Dylan F. Williams, Andrew M. Dienstfrey, Chih-Ming Wang, Jeffrey A. Jargon, David Humphreys, Matthew Harper, Heiko Fuser, Mark Bieler
Instruments for measuring high-speed waveforms typically require calibration to obtain accurate results. The national metrology institutes of the United States of America, the United Kingdom, and Germany offer measurement services based on electro-optic

A statistical study of de-embedding applied to eye diagram analysis

February 1, 2012
Author(s)
Paul D. Hale, Jeffrey A. Jargon, Chih-Ming Wang, Brett Grossman, Matthew Claudius, Jose Torres, Andrew M. Dienstfrey, Dylan F. Williams
We describe a stable method for calibrating digital waveforms and eye diagrams using the measurement system response function and its regularized inverse. The function describing the system response includes the response of the oscilloscope and any

Why are we concerned with large covariance matrices?

June 1, 2010
Author(s)
Paul D. Hale, Andrew M. Dienstfrey, Chih-Ming Wang
In order to promote discussion, we outline the two different paradigms for propagating uncertainties from the various waveform measurement impairments to the waveform parameters. The first method propagates uncertainty from the impairments directly to a

Electro-optic sampling for traceable high-speed electrical measurements

May 23, 2010
Author(s)
Paul D. Hale, Dylan F. Williams
We will describe how the complex frequency response of a high-speed photodiode is calibrated by use of electro-optic sampling. Our uncertainty analysis includes a unique covariance-matrix based method that allows us to transform uncertainties between the

Waveform metrology and a quantitative study of regularized deconvolution

May 1, 2010
Author(s)
Paul D. Hale, Andrew M. Dienstfrey
We present methodology and preliminary results of a Monte-Carlo simulation to perform a quantified analysis of regularized deconvolution in the context of full waveform metrology. We analyze the behavior of different regularized inversion methods with