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Publication Citation: A collapse of the cross-spectral function in phase noise metrology

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Author(s): Craig W. Nelson; Archita Hati; David A. Howe;
Title: A collapse of the cross-spectral function in phase noise metrology
Published: February 25, 2014
Abstract: Cross-spectral analysis is a mathematical tool for extracting the power spectral density of a correlated signal from two time series in the presence of uncorrelated interfering signals. We demonstrate and explain a set of conditions where the detection of the desired signal using cross-spectral fails partially or entirely in the presence of a second uncorrelated signal. Not understanding when and how this effect occurs can lead to dramatic under-reporting of the desired signal. Theoretical, simulated and experimental demonstrations of this effect as well as mitigating methods are presented.
Citation: Review of Scientific Instruments
Volume: 85
Pages: pp. 024705-1 - 024705-7
Keywords: amplitude noise;cross-correlation;cross-spectrum;phase noise
Research Areas: Physics