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我用FFT軟體算出x=[1,2,3,4,5,4,3,2]8個序列點的值,
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( j K( T( m0 B; LX[0] = 24+(0)j) r1 t# @+ S7 j) O
X[1] = -6.82842712475+(-1.33226762955E-15)j
4 s. q' p: Z4 `" o( E9 eX[2] = 3.09539720245E-17+(0)j
( C* d8 g. z) \3 R3 n& fX[3] = -1.17157287525+(2.88657986403E-15)j
; z5 q2 u3 f+ V" W: o- @5 Q/ f) QX[4] = 0+(-4.89842541529E-16)j# ]% S" U, q( [) x! U* E
X[5] = -1.17157287525+(-2.44249065418E-15)j
: k( ~0 S+ M& Y( z. BX[6] = -9.86282453277E-15+(-6.66133814775E-16)j
% a( h0 x t# r/ l+ VX[7] = -6.82842712475+(-2.22044604925E-15)j N$ l9 N! B i, @
* o P7 F- j. p& F' S( I% ]$ ^* ]
我該如何藉由這些值算出SNR及THD呢? |
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