Good evening,
I know some of the literature out there indicates otherwise, but I know
for
a fact now that the USRP1+TVRX has no issue demodulating DAB+, I’ve
successfully demodulated (in Matlab) some ~200MHz Australian DAB+
multiplexes (i.e. to the point of getting the AAC audio) with a very low
error rate i based on USRP input @ 64Mhz/32, and my frequency sync
wasn’t
the fanciest either. Code available to anyone interested.
The reason I’m actually posting however is I’ve turned my attention now
to
DVB-T. Having proved it can do DAB+ fairly well, I thought I’d try my
luck
with the TVRX again (yes, I know DQPSK is one thing and 64-QAM is
another,
but I like to be optimistic…)
So far the initial results were promising. I have sampled a local DVB-T
multiplex (FEC = 2/3, 7MHz, 64-QAM, 1/16) at 8 MHz and decoded the TPS
error
free. However, I’ve run into strange problems which I will discuss in a
separate posting.
In the meantime, I’d like to rule out the TVRX hardware.
Is there anyone out there with a non-TVRX(1) setup who can do me a
huge
favour and provide me high quality capture(s) of a DVB-T signal? Are
there
any other Australian/NZ users out there (due to Aus use of 7MHz DVB-T) -
for
the record, I have been sampling the GTV-9 and ATV-10 multiplexes at
191.5
and 219.5MHz respectively.
Ideally - use of high quality (roof mounted?) antenna, 7MHz DVB-T,
decimation = 8 (from 64MHz), p a minimum of 2million samples
(0.25seconds or
more).
I would be more than happy to share my results. As far as I know, there
is
no public DVB-T receiver for the USRP (correct me if I’m wrong).
Kind regards,
Jeremy