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- W2891624502 abstract "This paper is a contribution to the old problem of representing a signal in the coordinates of time and frequency. We review the fundamental Hilbert transform relationship in systems analysis and argue that the dual relationship assumed in signal analysis, i.e. spectral single-sidedness is not necessarily justifiable. Therefore, we abandon the analytic signal and utilize a carefully parameterized signal model composed of a superposition of complex, AM–FM components that enables rigorous definition of instantaneous amplitude and instantaneous frequency. We then propose the instantaneous spectrum (IS) and prove that it exactly localizes signal components in an instantaneous bandwidth sense. The relation of the IS to traditional time-frequency distributions is discussed and comparative examples are provided. It is shown that under certain conditions the IS specializes to the Fourier spectrum and properties of the IS, similar to standard Fourier transform properties, are given." @default.
- W2891624502 created "2018-09-27" @default.
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- W2891624502 date "2018-11-01" @default.
- W2891624502 modified "2023-09-25" @default.
- W2891624502 title "The Instantaneous Spectrum: A General Framework for Time-Frequency Analysis" @default.
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- W2891624502 doi "https://doi.org/10.1109/tsp.2018.2869121" @default.
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