Re: [Discuss-gnuradio] solving u0u0 problems

[Johannes Schmitz]

Hey Marcus,
I used oprofile to get a better idea where the problem is located.
I found that it is indeed a problem with libfftw3.
Besides the gnuradio fft block I am calculating a crosscorrelation
using the fft. That means fft-size will be 2*N-1 with vectorlength N.
So for 1024 vectorlength I will be calculating an fft of size 2047.
Maybe this is the problem.

Now my idea is to pad the fft input to a power of 2 size or use a
cyclic cross correlation instead.

Any other suggestions?

Johannes