Re: raspberry pi + dvb-t2

[Ron Economos]

I haven't tried it, but it may be possible on a Raspberry Pi 4. I 
wouldn't bother with anything less than a RPi4. I have successfully run 
a modified DVB-T2 flow graph on a Beagleboard-X15, but only at 5 MHz 
channel width (5.714285 Msps).

I've attached the flow graph. It uses short frames and 5/6 code rate to 
limit the amount of LDPC processing. It also sends a lot of dummy 
symbols, again to limit the amount of processing. However, it still 
attains 19.057285 Mbps at 5 MHz channel width. If you can get it to run 
at 8 MHz channel width, the bitrate will be 30.491656 Mbps.

It's also tuned for UHD v3.13.0.3-rc1. If you're using a later version 
of UHD, change send_frame_size=65536 to send_frame_size=8192 in the UHD 
Sink block. Using large USB frames helps to significantly lower 
processor load, but this feature has been removed from later versions of 
UHD.

Ron

On 3/18/21 04:17, Ali G. Dezfuli wrote:
> Hi all,
>
> Is there any experience in transmitting DVB-T2 with gnuradio and 
> raspberry pi (any version)?
> I just wonder if it can work real-time with about 9 MHz sampling 
> frequency of 8 MHz DVB-T2.
> Thank you!
>
> BR,
> AGD

vv009-4kfft.grc
Description: application/gnuradio-grc