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Author: Chih-Ming Wang

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1. Sequential Estimation of Timebase Corrections for an Arbitrarily Long Waveform
Published: 10/1/2012
Authors: Chih-Ming Wang, Paul D Hale, Jeffrey A Jargon, Dylan F Williams, Catherine A Remley
Abstract: 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 informatio ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909866

2. Pivotal Methods in the Propagation of Distributions
Published: 4/24/2012
Authors: Chih-Ming Wang, Jan Hannig, Hariharan K Iyer
Abstract: We propose a method for assigning a probability distribution to an input quantity. The distribution is used in the Monte Carlo method for uncertainty evaluation. The proposed method provides an alternative to other methods, such as the principle of m ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909867

3. Fiducial Prediction Intervals
Published: 2/18/2012
Authors: Chih-Ming Wang, Jan Hannig, Hariharan K Iyer
Abstract: This paper presents an approach for constructing prediction intervals for any given distribution. The approach is based on the principle of fiducial inference. We use several examples, including the normal, binomial, gamma, and Weibull distributions, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905933

4. A statistical study of de-embedding applied to eye diagram analysis
Published: 2/1/2012
Authors: Paul D Hale, Jeffrey A Jargon, Chih-Ming Wang, Brett Grossman, Matthew Claudius, Jose Torres, Andrew M Dienstfrey, Dylan F Williams
Abstract: 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907585

5. Use of Electronic Calibration Units for Vector-Network-Analyzer Verification
Published: 7/30/2010
Authors: Dylan F Williams, Arkadiusz C. (Arkadiusz) Lewandowski, Denis X LeGolvan, Ronald A Ginley, Chih-Ming Wang, Jolene D Splett
Abstract: We present measurements indicating that electronic calibration units are stable enough to be used in place of mechanical vector-network-analyzer verification artifacts. This enables a new fully automated approach to verifying microwave vector-network ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903470

6. Identifying RF Identification Cards from Measurements of Resonance and Carrier Harmonics
Published: 5/27/2010
Authors: Henry Romero, Catherine A Remley, Dylan F Williams, Chih-Ming Wang, Timothy X. Brown
Abstract: 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 mini ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904644

7. Correcting sampling oscilloscope timebase errors with a passively mode-locked laser that is phase-locked to a microwave oscillator
Published: 4/1/2010
Authors: Jeffrey A Jargon, Paul D Hale, Chih-Ming Wang
Abstract: In this paper, we describe an apparatus for correcting the timebase errors when calibrating the response of an equivalent-time sampling oscilloscope using a passively mode-locked erbium doped fiber laser that is phase locked to a microwave signal gen ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900876

8. Uncertainty calculation for spectral-responsivity measurements
Published: 9/1/2009
Authors: John H Lehman, Chih-Ming Wang, Marla L Dowell, Joshua Aram Hadler
Abstract: This paper discusses a procedure for measuring the absolute spectral responsivity of optical-fiber power meters and computation of the calibration uncertainty. The procedure reconciles measurement results associated with a monochromator-based measure ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33185

9. Electromagnetic Measurements for Counterfeit Detection of Radio-Frequency Identification Cards
Published: 5/2/2009
Authors: Henry Romero, Catherine A Remley, Dylan F Williams, Chih-Ming Wang
Abstract: We investigate a technique for counterfeit detection of radio-frequency identification cards based on the electromagnetic characteristics of the cards rather than the digital information that they transmit. We describe a method of measuring the elect ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33134

10. Calculation of pulse parameters and propagation of uncertainty
Published: 3/1/2009
Authors: Paul D Hale, Chih-Ming Wang
Abstract: The fundamental starting point for the analysis of all two-state waveforms is the determination of the low- and highstate levels. This is a two-step process. First, the data are grouped into points belonging to each state, and second, the value of ea ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32782