Motorola DSP Developer's Kit

mot563_fft

Motorola DSP Developer's Kit

mot563_fft

Motorola DSP Developer's Kit

mot563_fft

Y=mot563_fft(X)
Y=mot563_fft(X,N)
Y=mot563_fft(X,N,DIM)

Description

mot563_fft(X) is the discrete Fourier transform (DFT) of vector X. If the length of X is not a power of two, it will be padded with zeros to make the length a power of two.

For matrices, the FFT operation is applied to each column.

mot563_fft(X,N) is the N-point FFT.

mot563_fft(X,N,DIM) applies the FFT operation across the dimension DIM.

Characteristics

In the workspace, if the input is:

 X = [-0.0023 - 0.0101i  -0.0446 - 0.0229i  -0.0634 - 0.0223i
      -0.0701 - 0.0234i  -0.1196 - 0.0103i  -0.0244 - 0.0014i]

then execute the function:

 mot563_fft(X,2,2)
 ans=-0.0469 - 0.0330i   0.0423 + 0.0128i
     -0.1897 - 0.0337i   0.0495 - 0.0131i

Argument
X
   Vector (or matrix) with elements normalized in the range [-1,1] (for complex elements, both real and imaginary parts should comply with this limit).

See Also
mot563_ifft

mot563_dspround

mot563_filter