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A linear model for TF distribution of signals

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2 Author(s)
Nelson, Douglas J. ; U.S. Department of Defense, Ft. Meade, MD ; Smith, D.C.

We describe a new linear time-frequency model in which the instantaneous value of each signal component is mapped to the curve functionally representing its instantaneous frequency. This transform is linear, uniquely defined by the signal decomposition, and satisfies linear marginal-like distribution properties. We further demonstrate the transform generated surface may be estimated from the short time Fourier transform by a concentration process based on the phase of the short-time Fourier transform (STFT), differentiated with respect to time. Interference may be identified on the concentrated STFT surface, and the signal with the interference removed may be estimated by applying the linear-time-marginal to the concentrated STFT surface from which the interference components have been removed

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Signal Processing, IEEE Transactions on  (Volume:54 ,  Issue: 9 )