Show that the time-dependent Fourier transform, as defined by Eq. (10.18), has the following properties: (a) Linearity:
Question:
Show that the time-dependent Fourier transform, as defined by Eq. (10.18), has the following properties:
(a) Linearity:
If x[n] = ax1[n] + bx2[n], ? ? ? ??then? ? ? X[n, ?) = ?X1[n, ?) + bX2[n, ?).
(b) Shifting: If y[n] = x[n ? n0], then Y[n, ?) = X[n ? n0, ?).
(c) Modulation: If y[n] = ej?0n?x[n], then Y[n, ?) = ej?0n X[n, ? ? ?0).
(d) Conjugate Symmetry: If x[n] is real, then X[n, ?) = X*[n, ??).
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Related Book For
Discrete Time Signal Processing
ISBN: 978-0137549207
2nd Edition
Authors: Alan V. Oppenheim, Rolan W. Schafer
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