Did you repost this accidentally, or is this a new question? On Thu, Jan 6, 2022 at 12:15 PM Pedro Viegas <p...@koalatech.pt> wrote:
> Hi everyone, > > I'm having a problem when I increase the number of carriers from 64 to 512 > in the gnuradio OFDM example. When the number of carriers is 512, the > complex envelope of the signal in the time domain has some peaks, which I > can not have for the test I'm trying to make. Can anyone tell why there are > those peaks and how I get rid of them? > A possible cause for the peaks, in my opinion, can be the fixed frame len > of the header, that is filled with zeros when the FFT size increases, > resulting in a peak in the beginning of each frame because of the ifft > block. If this is the problem, how can I change that frame len? > To better show what I'm saying, there is an image on the attachments of > the complex envelope with the peaks, and a .txt file with the > specifications of the ofdm parameters. > > Thanks in advance, > Pedro Viegas >
