Evaluating Correlation Between Measurement Samples in Reverberation Chambers Using Clustering

Description

Evaluating Correlation Between Measurement Samples in Reverberation Chambers Using ClusteringAbstract: Traditionally, in reverberation chambers (RC) measurement autocorrelation or correlation-matrix methods have been applied to evaluate measurement correlation. In this article, we introduce the use of clustering based on correlative distance to group correlated measurements. We apply the method to measurements taken in an RC using one and two paddles to stir the electromagnetic fields and applying decreasing angular steps between consecutive paddles positions. The results using varying correlation threshold values demonstrate that the method calculates the number of effective samples and allows discerning outliers, i.e., uncorrelated measurements, and clusters of correlated measurements. This calculation method, if verified, will allow non-sequential stir sequence design and, thereby, reduce testing time.Keywords: Correlation, Pearson correlation coefficient (PCC), reverberation chambers (RC), mode-stirring samples, correlative distance, clustering analysis, adjacency matrix.

Resources

Name Format Description Link
47 FIG_02.txt https://data.nist.gov/od/ds/ark:/88434/mds2-2986/FIG_02.txt
47 https://data.nist.gov/od/ds/ark:/88434/mds2-2986/FIG_02.txt.sha256
47 FIG_03.txt https://data.nist.gov/od/ds/ark:/88434/mds2-2986/FIG_03.txt
47 https://data.nist.gov/od/ds/ark:/88434/mds2-2986/FIG_03.txt.sha256
47 https://data.nist.gov/od/ds/ark:/88434/mds2-2986/FIG_04.txt.sha256
47 FIG_05.txt https://data.nist.gov/od/ds/ark:/88434/mds2-2986/FIG_05.txt
47 https://data.nist.gov/od/ds/ark:/88434/mds2-2986/FIG_05.txt.sha256
47 https://data.nist.gov/od/ds/ark:/88434/mds2-2986/__CONGRESS_PAPER_Nogueira_et_el_018_4-page_SENT_CleanBW.pdf.sha256
33 __CONGRESS_PAPER_Nogueira_et_el_018_4-page_SENT_CleanBW.pdf https://data.nist.gov/od/ds/ark:/88434/mds2-2986/__CONGRESS_PAPER_Nogueira_et_el_018_4-page_SENT_CleanBW.pdf
47 FIG_04.txt https://data.nist.gov/od/ds/ark:/88434/mds2-2986/FIG_04.txt
47 https://data.nist.gov/od/ds/ark:/88434/mds2-2986/2986_README.txt.sha256
47 2986_README.txt https://data.nist.gov/od/ds/ark:/88434/mds2-2986/2986_README.txt

Tags

  • clustering-analysis
  • correlative-distance
  • pearson-correlation-coefficient-pcc
  • mode-stirring-samples
  • reverberation-chambers-rc
  • correlation
  • adjacency-matrix

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