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Title:
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Design of time-frequency distributions for amplitude and IF estimation of multicomponent signals |
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Author:
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Hussain, Z.M.; Boashash, B
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Abstract:
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This paper presents a new class of time-frequency. distributions (TFDs) suitable for efficient amplitude and instantaneous frequency (IF) estimation of mono- and multicomponent FM signals. The main characteristic of these TFDs, referred to as T-distributions, is that their kernels are functions of time only in the time-lag domain, hence the name time-only kernels. It is shown that separable time-lag kernels should be lag-independent for best resolution. In addition, amplitude estimation is possible directly from the T-distributions in the case of FM signals, a property that is not verified by other TFDs. The exponential and hyperbolic members of this class are analyzed. Numerical examples are incorporated to show the superior performance of the time-only kernels as compared to their two-dimensional counterparts. |
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Description:
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This is an earlier paper that defines the Modified B Distribution (MBD) for the joint estimatation of Instantaneous Frequency and Instantaneous Amplitude for non-stationary multicomponent signals.
(The most recent upgrade of the original software package that calculates Time-Frequency Distributions and Instantaneous Frequency estimators can be downloaded from the web site: www.time-frequency.net. This was the first software developed in the field, and it was first released publicly in 1987 at the 1st ISSPA conference held in Brisbane, Australia, and then continuously updated). |
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URI:
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http://hdl.handle.net/10576/10740
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Date:
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2001 |