Hãy xác định Y ( e j ω ) nếu. F T [ x ( n ) ] = X ( e j ω ) ; F T [ y ( n ) ] = Y ( e j ω ) vói y ( n ) = e j

$Y\left(e{}^{j\omega }\right)=X\left(e{}^{j\left(\omega -\omega {}_0\right)}\right)$

$Y\left(e{}^{j\omega }\right)=e{}^{j\omega {}_{0}n}\cdot X\left(e{}^{j\omega }\right)$

$Y\left(e{}^{j\omega }\right)=X\left(e{}^{j\left(\omega +\omega {}_0\right)}\right)$

$Y\left(e{}^{j\omega }\right)=e{}^{-j\omega {}_{0}n}\cdot X\left(e{}^{j\omega }\right)$