2022
DOI: 10.36227/techrxiv.21401703.v1
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A Slice of Trispectrum for Patterns of Modulation

Abstract: <p>Modulation can be identified in a signal from correlations of power across frequencies. Resolving power over time and frequency using standard techniques of bandpass filtering and squaring creates bias: filtering presupposes a timescale and bandwidth for modulation, while squaring complicates separation from noise. Higher-order spectra (HOS) can be used to estimate power correlations without bias. HOS are not widely familiar because their meaning is thought to be obscure. A natural interpretation of t… Show more

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