dorsal/arxiv
View SchemaNon-commutative time-frequency tomography
| Authors | V. I. Man'ko, R. Vilela Mendes |
|---|---|
| Categories | |
| ArXiv ID | physics/9712022 |
| URL | https://arxiv.org/abs/physics/9712022 |
| Journal | Physics Letters A 263 (1999) 53 - 61 |
Abstract
The characterization of non-stationary signals requires joint time and frequency information. However, time (t) and frequency (omega) being non-commuting variables there cannot be a joint probability density in the (t,omega) plane and the time-frequency distributions, that have been proposed, have difficult interpretation problems arising from negative or complex values and spurious components. As an alternative we propose to obtain time-frequency information by looking at the marginal distributions along rotated directions in the (t,omega) plane. The rigorous probability interpretation of the marginal distributions avoids all interpretation ambiguities. Applications to signal analysis and signal detection are discussed as well as an extension of the method to other pairs of non-commuting variables.
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"abstract": "The characterization of non-stationary signals requires joint time and\nfrequency information. However, time (t) and frequency (omega) being\nnon-commuting variables there cannot be a joint probability density in the\n(t,omega) plane and the time-frequency distributions, that have been proposed,\nhave difficult interpretation problems arising from negative or complex values\nand spurious components. As an alternative we propose to obtain time-frequency\ninformation by looking at the marginal distributions along rotated directions\nin the (t,omega) plane. The rigorous probability interpretation of the marginal\ndistributions avoids all interpretation ambiguities. Applications to signal\nanalysis and signal detection are discussed as well as an extension of the\nmethod to other pairs of non-commuting variables.",
"arxiv_id": "physics/9712022",
"authors": [
"V. I. Man\u0027ko",
"R. Vilela Mendes"
],
"categories": [
"physics.data-an"
],
"journal_ref": "Physics Letters A 263 (1999) 53 - 61",
"title": "Non-commutative time-frequency tomography",
"url": "https://arxiv.org/abs/physics/9712022"
},
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