|From:||Marcus D. Leech|
|Subject:||Re: [Discuss-gnuradio] RFNoC FFT Size|
|Date:||Thu, 03 Mar 2016 11:47:26 -0500|
|User-agent:||Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0|
On 03/03/2016 11:10 AM, Simon Olvhammar wrote:
Martin/Jonathan could comment on FPGA limits--I don't think anything larger than 2048 is actually implemented, but I don't see
what one couldn't internally compute a larger FFT in the FPGA, being careful to consider resources.
In regular GNU Radio, FFTs are being computed on the host PC, there's no packet-size limitation. The limit in RFNOC is due to the
way data are packetized between the X310 and the host PC. Since there's no current mechanism for splitting FFTs across multiple
VITA frames, you're limited to what you can do in a single ethernet-layer frame.
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