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Finite-time averaged power spectra

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1 Author(s)

This paper deals with harmonizable nonstationary second-order stochastic processes. The approximations and hypotheses that are necessary to derive a spectral distribution for the finite-time averaged power are first considered. Then the class of asymptotically stationary processes is defined; an expression is established for the spectral distribution of its finite-time averaged power; and the statistical errors are derived in the estimate of this spectrum from its realizations.

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Information Theory, IEEE Transactions on  (Volume:17 ,  Issue: 1 )