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Bicoherence: Difference between revisions
→Interpretation
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the phase between the wave at ω and the sum wave | the phase between the wave at ω and the sum wave | ||
ω<sub>1</sub>+ω<sub>2</sub> is nearly constant over a significant number of realizations. | ω<sub>1</sub>+ω<sub>2</sub> is nearly constant over a significant number of realizations. | ||
The two-dimensional bicoherence graph tends to show mainly two types of structures: | |||
* 'Points': indicating sharply defined, unchanging, locked frequencies (as occurs with a driving mode and a slave mode; energy transfer in a single direction). | |||
* 'Lines': these are more difficult to interpret. It is often stated that 'lines' are due to single mode (frequency) interacting with a broad range of frequencies (e.g., a [[Geodesic Acoustic Mode]] and broad-band turbulence) - but it is not evident that this is the only explanation. Particularly, two interacting oscillators (continuously exchanging energy) ''also'' produce lines in the bicoherence graph. | |||
== Notes == | == Notes == | ||