Hi Andreas, I am also interested in your work. Would you be so kind of sending me your thesis when it is finished?
Thanks a lot! Best regards, Carles Fernández. On Tue, Jun 10, 2008 at 4:01 PM, Andreas Müller <[EMAIL PROTECTED]> wrote: > Hello Chris > > > we would like to implement a DAB receiver with GNU radio. On the > > hardware side we have a USRP with the TVRX daughterboard. > > Jens Elsner, who worked on DAB some time ago, found out that the TVRX > actually disturbs the OFDM signal very much, making it rather hard to > receive DAB, so I would strongly discourage its use (I'm not able to get > any information out of TVRX samples currently). > > My current setup involves a spectrum analyzer to receive the signal, and > an external mixer+signal generator to convert from the IF of the SA down > to 10 MHz for the BasicRX. I have uploaded some of the samples to [1]. > > > If you have a DAB station in the L-Band near you, you can also use the > DBSRX. (@Jens -> is it ok if I publish your mode 2 samples as well?). > > > From some > > older posts on this list, i learned that there are already some people > > trying to do this. > > I have implemented part of DAB for my current semester thesis. I have a > working physical layer (all OFDM stuff, all 4 DAB modes complete for > transmitting and receiving), and enough of the FIC (fast information > channel) to see the names of the radio stations (receiving+some blocks > for transmitting; all modes). To actually hear something, the MSC > (main service channel) would be needed (many blocks in the MSC already > exist, as they are needed for the FIC too, so it should not be that much > work). > > > Is there any initial advice or pointers to existing implementations you > > could give us? Do we need the checkout the svn version or even some > > branch or is the 'latest stable' enough? > > > > I have uploaded my current code to [2]. It requires GNU Radio from the > trunk and some small patches (mainly for the peak detector). If you are > interested, I can also send you my mostly-finished semester thesis > off-list. > > I hope to finish the FIC in the next week or so, but as my thesis is > over at the end of this week, I am not sure, when/if I'll get to the > MSC. The code for OFDM and FIC currently runs real-time on my four year > old ThinkPad (Pentium M 1.6 GHz). > > Regards, Andreas > > [1] > http://people.ee.ethz.ch/~andrmuel/files/gnuradio/samples/<http://people.ee.ethz.ch/%7Eandrmuel/files/gnuradio/samples/> > [2] > http://people.ee.ethz.ch/~andrmuel/files/gnuradio/gr-dab.tgz<http://people.ee.ethz.ch/%7Eandrmuel/files/gnuradio/gr-dab.tgz> > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
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