patrickjennings
09-20-2007, 01:01 PM
I think we can all agree that FFT { x*(n) } = X*(N-k), or the FFT of th
conj of x(n) is the conj of the reversed version of the FFT of x(n).
But in MATLAB if a= [1+2j 3+4j 5+6j 7+8j] then
fft(conj(a)) = [16+20j -8+0j -4-4j 0-8j]
and
conj(fliplr(fft(a))) = [-8+0j -4-4j 0-8j 16+20j]
Any ideas? Another engineer and I spent most of a day looking at th
model before finding the fundamental problem.
Cheers
/Patrick
conj of x(n) is the conj of the reversed version of the FFT of x(n).
But in MATLAB if a= [1+2j 3+4j 5+6j 7+8j] then
fft(conj(a)) = [16+20j -8+0j -4-4j 0-8j]
and
conj(fliplr(fft(a))) = [-8+0j -4-4j 0-8j 16+20j]
Any ideas? Another engineer and I spent most of a day looking at th
model before finding the fundamental problem.
Cheers
/Patrick