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You searched on: Author: chih-ming wang

Displaying records 11 to 20 of 73 records.
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11. 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 ...

12. Traceability of high-speed electrical waveforms at NIST, NPL, and PTB
Published: 7/6/2012
Authors: Paul D Hale, Dylan F Williams, Andrew M Dienstfrey, Chih-Ming Wang, Jeffrey A Jargon, David Humphreys, Matthew Harper, Heiko Fuser, Mark Bieler
Abstract: 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-op ...

13. 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 ...

14. 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, ...

15. 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 ...

16. On Non-Linear Estimation of a Measurand
Published: 11/7/2011
Authors: Chih-Ming Wang, Hariharan K Iyer
Abstract: We consider an estimation problem described in the Guide to the Expression of Uncertainty in Measurement (GUM). The problem is concerned with estimating a measurand that is a non-linear function of input quantities. The GUM describes two methods for ...

17. On Multiple-Method Studies
Published: 10/4/2010
Authors: Chih-Ming Wang, Hariharan K Iyer
Abstract: In this paper we review statistical models that describe measurements from a multiple-method study such as in the development of a reference material. We also review requirements for the so-called GUM compliance as this appears to be an important cri ...

18. Use of Electronic Calibration Units for Vector-Network-Analyzer Verification
Published: 7/30/2010
Authors: Dylan F Williams, Arkadiusz C. Lewandowski, Denis X. (Denis Xavier) 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 ...

19. On interchangeability of two laboratories
Published: 6/18/2010
Authors: Chih-Ming Wang, Hariharan K Iyer
Abstract: This paper proposes a measure for assessing the degree of equivalence between the two laboratories in a key comparison. The measure is called asymmetric degree of interchangeability. It is asymmetric since, based on this measure, a laboratory may be ...

20. Covariance-Based Vector-Network-Analyzer Uncertainty Analysis for Time- and Frequency-Domain Measurements
Published: 6/10/2010
Authors: Arkadiusz C. Lewandowski, Dylan F Williams, Paul D Hale, Chih-Ming Wang, Andrew M Dienstfrey
Abstract: We develop a covariance-matrix-based uncertainty analysis for vector-network-analyzer scattering-parameter measurements. The covariance matrix captures all of the measurement uncertainties and statistical correlations between them. This allows the un ...

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