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 _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
