On Fri, Feb 24, 2012 at 2:58 PM, Philip Balister <phi...@balister.org> wrote: > On 02/24/2012 02:45 PM, Rafael Diniz wrote: >> It would be nice, but it could be fixed up and converted to cmake in the >> current svn repo also... > > But most of us have forgotten how to use subversion :)
For those who want to have their cake and eat it too: http://subgit.com/ Brian > Philip > >> >> >> >>> The CGRAN RDS code seems abandoned, I'm thinking about cloning it to >>> github so it can be converted to UHD and Cmake and fixed up. >>> >>> On Fri, Feb 24, 2012 at 1:31 PM, <mle...@ripnet.com> wrote: >>>> I don't know about having it inside the main codebase, but converting it >>>> to >>>> use the CMake build system would be good, since it didn't really >>>> understand >>>> how to place its python files into a filesystem that uses >>>> /usr/local/lib64--so I had to move them manually. >>>> >>>> -Marcus >>>> >>>> >>>> >>>> On Fri, 24 Feb 2012 10:23:48 -0800, Rafael Diniz wrote: >>>> >>>> It would be great to have the rds code inside the gnuradio tree instead >>>> of >>>> in a separate cgran project! >>>> ; ) >>>> >>>> I don't know why, but when I tried the cgran rds code, the grc example >>>> worked much better then the python one. >>>> >>>> Best regards, >>>> Rafael Diniz >>>> >>>> >>>> >>>> Actually, I'm using the blks2 WBFM block, which I believe is a PLL >>>> demodulator. >>>> >>>> Both of my "test" stations are actually roughly 100km >>>> away from me, broadcasting from a high point in the Ottawa Valley. >>>> >>>> One >>>> station comes in about 10dB stronger than the other, although both have >>>> an ERP of about 100kW, and both are located on the same transmit tower. >>>> >>>> >>>> I'll send you my 'stuff' once I'm more comfortable with it. The audio >>>> quality is actually reasonably good, so I think the FM demodulator >>>> portion is just fine. >>>> >>>> -Marcus >>>> >>>> On Fri, 24 Feb 2012 11:12:28 -0500, >>>> Andrew Davis wrote: >>>> >>>> I think the problems with SNR is with the FM >>>> >>>> Demod, my car stereo can >>>> >>>> get RDS as the station fades 40 miles away, >>>> >>>> but with my USRP has >>>> >>>> trouble picking up the stereo pilot from a 50kw >>>> >>>> station one mile away >>>> >>>> ( -10dBm ). FM demod is hard for software ( I >>>> >>>> think GNUradio just uses >>>> >>>> a zero-crossing detector ). >>>> >>>> Do you have >>>> >>>> the code, I would love to test it. >>>> >>>> On Thu, Feb 23, 2012 at 11:33 >>>> >>>> PM, Marcus D. Leech wrote: >>>> >>>> I managed to get gr-rds built tonight, and >>>> >>>> was able to test it planted inside my FM receiver. Even for a local >>>> station, there are *lots* of errors, and more distant stations get even >>>> more. I'm going to play around a bit with filter bandwidths, etc, to see >>>> if I can improve it. Looking at the modulation technique, it's no big >>>> surprise--they use a bi-phase baseband coding (basically like >>>> differential Manchester), that drives a DSB-SC modulator with a carrier >>>> at 57kHz. But that signal is generally about 20dB below the other audio >>>> sub-channels on the FM demodulator output. So the SNR is generally >>>> *terrible*. I'm rather surprised, after looking at it, that anyone >>>> bother deploying RDS. It seems utterly crappy. It's generally broadcast >>>> with fairly-low SNR, and there's no FEC built in, only CRC. I re-jigged >>>> the XML for the demodulator part so you can reset the demodulator state >>>> machine from within a GRC flow-graph (there was a reset() method on the >>>> demod, but it wasn't exposed within the XML framework for GRC). Also, I >>>> may re-jig the decoder portion--it currently injects decoded frames into >>>> a message queue and to stdout. Might be useful to do other things with >>>> those messages. Like is there a simple way to have a message dequeuer >>>> within a GRC flow-graph so that one could stuff messages into a >>>> variable? -- Principal Investigator Shirleys Bay Radio Astronomy >>>> Consortium http://www.sbrac.org [1] >>>> _______________________________________________ Discuss-gnuradio mailing >>>> list Discuss-gnuradio@gnu.org [2] >>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio [3] >>>> >>>> >>>> >>>> >>>> Links: >>>> ------ >>>> [1] http://www.sbrac.org >>>> [2] >>>> mailto:Discuss-gnuradio@gnu.org >>>> [3] >>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>>> [4] >>>> mailto:mle...@ripnet.com >>>> _______________________________________________ >>>> Discuss-gnuradio mailing list >>>> Discuss-gnuradio@gnu.org >>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> Discuss-gnuradio mailing list >>>> Discuss-gnuradio@gnu.org >>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> Discuss-gnuradio mailing list >>>> Discuss-gnuradio@gnu.org >>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>>> >>> >>> _______________________________________________ >>> Discuss-gnuradio mailing list >>> Discuss-gnuradio@gnu.org >>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>> >> >> >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio