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A New Approach to the Spectrum Analysis of Nonstationary Signals

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1 Author(s)
Wierwille, W.W. ; Cornell Aeronautical Laboratory, Inc., of Cornell University, Buffalo, N. Y.

A new approach is presented which allows proper spectral measurements of time-nonstationary signals. The power spectrum is defined on the basis of ensemble averages and therefore contains a time variation when the signals are nonstationary. It is shown that a spectrum analyzer can be designed which measures these time-varying spectra in a nearly optimum manner. Design equations are given and practical considerations are discussed.

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Applications and Industry, IEEE Transactions on  (Volume:82 ,  Issue: 69 )