Question: ( ) , MATLAB fft . , ( t ) = 3 0 s i n ( 2 1 0 t ) 7 / 9

(), MATLAB fft .,(t)=30sin(210t)
7/9
Aliasing Aliasing Aliasing .
x[k]=n=0N-1x[n]*e-j2Nkn
( ) , MATLAB fft . , ( t ) = 3 0 s i n ( 2 1 0 t

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