Inverse discrete Fourier transform
ifft(x) is the inverse discrete Fourier
transform (DFT) of the Galois vector
x is in
the Galois field GF(2m), the length of
must be 2m-1.
For an example using
ifft, see the reference page for
The Galois field over which this function works must have 256 or fewer elements. In
x must be in the Galois field
GF(2m), where m is an integer between 1 and 8.
x is a column vector,
dftmtx to the multiplicative inverse of the primitive element of the
Galois field and multiplies the resulting matrix by