Versatile system analysis procedure based on a frequency domain variant of velvet noise

2020 ◽  
Vol 148 (4) ◽  
pp. 2510-2510
Author(s):  
Hideki Kawahara ◽  
Ken-Ichi Sakakibara ◽  
Mitsunori Mizumachi ◽  
Masanori Morise ◽  
Hideki Banno
Keyword(s):  
Frequency Domain ◽  
System Analysis ◽  
Analysis Procedure ◽  
Domain Variant

scholarly journals Investigation of measurement data of low-coherence interferometry at tilted surfaces in the 3D spatial frequency domain

2021 ◽  
Vol 88 (s1) ◽  
pp. s65-s70
Author(s):  
Marco Künne ◽  
Sebastian Hagemeier ◽  
Eireen Käkel ◽  
Hartmut Hillmer ◽  
Peter Lehmann
Keyword(s):  
Spatial Frequency ◽  
Frequency Domain ◽  
Nanoimprint Lithography ◽  
System Analysis ◽  
Measurement Data ◽  
Numerical Aperture ◽  
Surface Slopes ◽  
Ewald Sphere ◽  
Interference Signals ◽  
Spatial Frequency Domain

Abstract The 3D transfer characteristics of interference microscopes and their effect on the interference signals occurring at surface slopes are studied. The interference image stacks acquired during a depth scan are 3D Fourier transformed. This allows a comprehensive frequency domain analysis of the interferograms. The double foil model introduced in a previous publication enables the interpretation of the signal spectra and the underlying transfer behavior of the interferometer using the concept of the Ewald sphere, which is limited by the numerical aperture (NA) of the imaging system. Analysis in the 3D spatial frequency domain directly discloses that the lateral dimensions of the transfer function depend on the axial spatial frequency. In this contribution we investigate measuring objects produced by Nanoimprint-Lithography. The corresponding signal spectra bear information that can be utilized to optimize the subsequent signal processing algorithms. These include envelope and phase evaluation procedures of the interference signals. A narrow bandpass filter is used to actively select certain frequency components in order to improve the robustness of the estimation of the envelope position. Although the shape and width of the envelope are affected, this procedure increases the reliability of the evaluation process and improves the accuracy of the measured topography especially at steeper surface slopes.

scholarly journals System analysis of spatial frequency domain imaging for quantitative mapping of surgically resected breast tissues

2013 ◽  
Vol 18 (3) ◽  
pp. 036012 ◽  
Author(s):  
Ashley M. Laughney ◽  
Venkataramanan Krishnaswamy ◽  
Tyler B. Rice ◽  
David J. Cuccia ◽  
Richard J. Barth ◽  
...  
Keyword(s):  
Spatial Frequency ◽  
Frequency Domain ◽  
System Analysis ◽  
Spatial Frequency Domain Imaging ◽  
Quantitative Mapping ◽  
Breast Tissues ◽  
Spatial Frequency Domain

Nakagami-m fading modeling in the frequency domain for OFDM system analysis

2003 ◽  
Vol 7 (10) ◽  
pp. 484-486 ◽  
Author(s):  
Zhengjiu Kang ◽  
Kung Yao ◽  
F. Lorenzelli
Keyword(s):  
Frequency Domain ◽  
System Analysis ◽  
Ofdm System

The Elicited Language Analysis Procedure

1982 ◽  
Vol 13 (1) ◽  
pp. 37-41
Author(s):  
Larry J. Mattes
Keyword(s):  
Diagnostic Tool ◽  
Descriptive Analysis ◽  
Quality Measures ◽  
Analysis Procedure ◽  
Elicited Imitation ◽  
Response Quality ◽  
Semantic Relationships ◽  
Language Analysis

Elicited imitation tasks are frequently used as a diagnostic tool in evaluating children with communication handicaps. This article presents a scoring procedure that can be used to obtain an in-depth descriptive analysis of responses produced on elicited imitation tasks. The Elicited Language Analysis Procedure makes it possible to systematically evaluate responses in terms of both their syntactic and semantic relationships to the stimulus sentences presented by the examiner. Response quality measures are also included in the analysis procedure.

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