I did some experiments with DAB which is, (due to differential
modulation), simpler than DVB. On the PHY level I managed to get
“almost” (about 60%) real-time performance on my P4 with GNU Radio
and prerecorded samples.
This was only PHY (even without channel coding!), and the
synchronization algorithm used was pretty shaky. Channel coding eats
up a lot of resources as well, look at the throughput figures for
DAB has a bandwidth of 1,5 MHz, DVB more than 5 MHz. All in all
my guess is that 5-8 years from now it might be possible to do these
of bandwidths on a general purpose processor. But this is just my
When starting to work on DVB, you’ll have to write a transmitter chain
and a receiver separately, to you can test both. Just look at the
GNU Radio examples. I would suggest to limit your final thesis to the
PHY layer first - OFDM synchronization by itself is a real challenge.
What I noticed is that, due to the way transmission protocols are
designed, there is not “one solutions fits all” approach. You would
have to tailor available OFDM code to the specific needs of DVB (DAB).
A good way to start might be the new GNU Radio OFDM code available
A good way to “get a feeling” for real data might be to look at it in
Matlab or Octave. You could test signal processing algorithms in such
an enviroment as well.
improvements since the video was recorded?
…How could I test a non real time transmitter? (I think I
understand not real time receiver but how did you test the