Syntax

fft(x) 

Description

fft(x) is the discrete Fourier transform (DFT) of the Galois vector x. If x is in the Galois field GF(2^m), the length of x must be 2^m-1.

Limitations

The Galois field over which this function works must have 256 or fewer elements. In other words, x must be in the Galois field GF(2^m), where m is an integer between 1 and 8.

Algorithms

If x is a column vector, fft applies dftmtx to the primitive element of the Galois field and multiplies the resulting matrix by x.

See Also

dftmtx | gf | ifft