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A new concept of alias-free sampling of continuous-time processes X = \ X (t), - is introduced. The new concept is shown to be distinct from the traditional concept 1-3. various criteria for a given sampling scheme \{t₍\ to be alias-free in the new sense are developed. The relationship of the new definition to the question of estimating the spectral density function () of the continuous-time process X from its samples \X (tₓ) \ is discussed.
E. Masry (Mon,) studied this question.
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