Re: [Discuss-gnuradio] RFNoC FFT Size

[Marcus D. Leech]

On 03/03/2016 05:21 AM, Simon Olvhammar wrote:
> Hi,
>
> I'm wondering what it would take to modify the current FFT RFNoC block 
> to be able to compute a 8192 channel FFT. Someone that can guide me in 
> the right direction? I'm a quite experienced programmer, however not 
> in HDL.
>
> Best regards
> Simon
The main current stumbling block to large FFTs in RFNOC is that the FFT 
output has to be able to fit into a single transport packet, and
  that is limited to 9000 bytes, which pretty-much limits you to 
2048-bin FFTs.  There will be work in the future to allow FFT outputs in
  RFNOC to span multiple packets.