[Discuss-gnuradio] MIT 6.450 Principles of Digital Comms
FYI, graduate level intro to digital comms on OCW: http://ocw.mit.edu/OcwWeb/Electrical-Engineering-and-Computer-Science/6-450Fall-2006/Syllabus/index.htm Eric ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] DAB receiver
Hello Jens > The work I did on DAB was basically OFDM synchronization in one GNU > Radio block. The code was more or less a hack, but it deepened my > understanding of digital signal processing. Not as easy as in text > books. :) I'll email the report to you separately. Thanks .. > > I wouldn't underestimate the complexities of the higher DAB layers, > it has quite a protocol stack. But you should give it a try. If you I actually did get a bit scared when I first looked at the 200 page standard, but I hope that if I go for the "simplest possible" approach for a start, a lot can be omitted (like service information). As DAB+ isn't available here, I also intend to just go for DAB. > need captured Mode I/II samples I can make them available for download. Thanks, but I can get quite a nice Mode I signal with the TVRX, so no need... Regards, Andreas signature.asc Description: OpenPGP digital signature ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] DAB receiver
Jens Elsner wrote: > Hallo Andreas, > > with the current status of OFDM PHY code in GNU Radio I think it is definately > worth a try. > > The work I did on DAB was basically OFDM synchronization in one GNU > Radio block. The code was more or less a hack, but it deepened my > understanding of digital signal processing. Jens, I have downloaded your gr-dab code in 2007. Is it OK if I put up a mirror of it on my website. Maybe it could deepen the understanding of others about OFDM too. Greetings, Martin > Not as easy as in text > books. :) I'll email the report to you separately. > > I wouldn't underestimate the complexities of the higher DAB layers, > it has quite a protocol stack. But you should give it a try. If you > need captured Mode I/II samples I can make them available for download. > > Gruesse, > Jens > > On Wed, Feb 20, 2008 at 07:14:24PM +0100, Andreas Müller wrote: >> Hello, >> >> I am an electrical engineering student, and I would like to implement a >> DAB receiver as a semester thesis (about 1/3 the size of a Master thesis). >> >> I intend to implement each part first in Matlab and then in GNU Radio. >> Ideally, I hope to use the existing OFDM code in gnuradio-core and some >> external MP2 library for the audio decoding. >> >> However, I am wondering if this is feasible as a semester thesis. Any >> comment about the rough amount of work that would be needed would be >> greatly appreciated. >> >> In the mailing lists, there are some references to an existing DAB >> implementation from ([1],[2]). Can anyone tell me how far this got? The >> referenced website (http://www.1c3.de/gr-dab.tar.bz2) is empty. >> >> Regards, Andreas >> >> [1] >> http://lists.gnu.org/archive/html/discuss-gnuradio/2006-08/msg00205.html >> [2] >> http://lists.gnu.org/archive/html/discuss-gnuradio/2006-03/msg00397.html >> > > > >> ___ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org >> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] DAB receiver
Hallo Andreas, with the current status of OFDM PHY code in GNU Radio I think it is definately worth a try. The work I did on DAB was basically OFDM synchronization in one GNU Radio block. The code was more or less a hack, but it deepened my understanding of digital signal processing. Not as easy as in text books. :) I'll email the report to you separately. I wouldn't underestimate the complexities of the higher DAB layers, it has quite a protocol stack. But you should give it a try. If you need captured Mode I/II samples I can make them available for download. Gruesse, Jens On Wed, Feb 20, 2008 at 07:14:24PM +0100, Andreas Müller wrote: > Hello, > > I am an electrical engineering student, and I would like to implement a > DAB receiver as a semester thesis (about 1/3 the size of a Master thesis). > > I intend to implement each part first in Matlab and then in GNU Radio. > Ideally, I hope to use the existing OFDM code in gnuradio-core and some > external MP2 library for the audio decoding. > > However, I am wondering if this is feasible as a semester thesis. Any > comment about the rough amount of work that would be needed would be > greatly appreciated. > > In the mailing lists, there are some references to an existing DAB > implementation from ([1],[2]). Can anyone tell me how far this got? The > referenced website (http://www.1c3.de/gr-dab.tar.bz2) is empty. > > Regards, Andreas > > [1] > http://lists.gnu.org/archive/html/discuss-gnuradio/2006-08/msg00205.html > [2] > http://lists.gnu.org/archive/html/discuss-gnuradio/2006-03/msg00397.html > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Underrun (using libusrp only)
On Wed, Feb 20, 2008 at 06:58:38PM +0100, Per Zetterberg wrote: > > I am using the latest version of Ubuntu. I used the binary packages ( > http://gnuradio.org/trac/wiki/DebianPackages ). So I don't have any Makefile > (how much I understand). > > I am running on a Dell D600 Laptop. > > BR/ > Per Could your laptop be in some kind of "slow/powersave mode"? If so, try setting it to the "I'm not kidding, I want performance" mode. Eric > > -Original Message- > > From: Eric Blossom [mailto:[EMAIL PROTECTED] > > Sent: den 19 februari 2008 18:19 > > To: Per Zetterberg > > Cc: discuss-gnuradio@gnu.org; 'Per Zetterberg' > > Subject: Re: [Discuss-gnuradio] Underrun (using libusrp only) > > > > On Tue, Feb 19, 2008 at 01:59:45PM +0100, Per Zetterberg wrote: > > > > > > Dear All, > > > > > > I am trying to send a square-wave from the USRP DAC (basic > > TX board). > > > I have made the the following little C++ program - but it gives me > > > underruns whenever I set the interpolation factor less than 64. Any > > > help is appreciated! > > > > > > BR/ > > > Per Zetterberg > > > > What kind of machine and OS are you running this on? > > > > What FUSB_TECH is configure choosing? > > You can find this out by grepping a Makefile for FUSB_TECH. E.g., > > > > [EMAIL PROTECTED] gnuradio-core]$ grep FUSB_TECH Makefile FUSB_TECH = linux > > > > Eric > > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
RE: [Discuss-gnuradio] Underrun (using libusrp only)
I am using the latest version of Ubuntu. I used the binary packages ( http://gnuradio.org/trac/wiki/DebianPackages ). So I don't have any Makefile (how much I understand). I am running on a Dell D600 Laptop. BR/ Per > -Original Message- > From: Eric Blossom [mailto:[EMAIL PROTECTED] > Sent: den 19 februari 2008 18:19 > To: Per Zetterberg > Cc: discuss-gnuradio@gnu.org; 'Per Zetterberg' > Subject: Re: [Discuss-gnuradio] Underrun (using libusrp only) > > On Tue, Feb 19, 2008 at 01:59:45PM +0100, Per Zetterberg wrote: > > > > Dear All, > > > > I am trying to send a square-wave from the USRP DAC (basic > TX board). > > I have made the the following little C++ program - but it gives me > > underruns whenever I set the interpolation factor less than 64. Any > > help is appreciated! > > > > BR/ > > Per Zetterberg > > What kind of machine and OS are you running this on? > > What FUSB_TECH is configure choosing? > You can find this out by grepping a Makefile for FUSB_TECH. E.g., > > [EMAIL PROTECTED] gnuradio-core]$ grep FUSB_TECH Makefile FUSB_TECH = linux > > Eric > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] DAB receiver
Hello, I am an electrical engineering student, and I would like to implement a DAB receiver as a semester thesis (about 1/3 the size of a Master thesis). I intend to implement each part first in Matlab and then in GNU Radio. Ideally, I hope to use the existing OFDM code in gnuradio-core and some external MP2 library for the audio decoding. However, I am wondering if this is feasible as a semester thesis. Any comment about the rough amount of work that would be needed would be greatly appreciated. In the mailing lists, there are some references to an existing DAB implementation from ([1],[2]). Can anyone tell me how far this got? The referenced website (http://www.1c3.de/gr-dab.tar.bz2) is empty. Regards, Andreas [1] http://lists.gnu.org/archive/html/discuss-gnuradio/2006-08/msg00205.html [2] http://lists.gnu.org/archive/html/discuss-gnuradio/2006-03/msg00397.html signature.asc Description: OpenPGP digital signature ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] RuntimeError: Unable to find USRP #0
On Wed, Feb 20, 2008 at 06:08:37PM +0200, Sebastiaan Heunis wrote: > Hi > > Can anyone please help me? I am using gnuradio3.1.1. I had no build > problems and it installed fine. When I try to run > usrp_benchmark_usb.py, I get the a RuntimeError: Unable to find USRP > #0. I don't think that the firmware gets downloaded to the USRP, > since the one light keeps on flashing quite fast. When I issue > > ls -lR /dev/bus/usb | grep usrp, > > I get > > crw-rw 1 root usrp 189, 516 Feb 20 17:59 005. > What groups are you a member of? [EMAIL PROTECTED] spu]$ groups eb sys wheel uucp usrp You need to be member of usrp. Easiest way to fix this is to edit /etc/group with your favorite editor, add yourself to the line that starts with usrp, then log out and log back in. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] RuntimeError: Unable to find USRP #0
Hi Can anyone please help me? I am using gnuradio3.1.1. I had no build problems and it installed fine. When I try to run usrp_benchmark_usb.py, I get the a RuntimeError: Unable to find USRP #0. I don't think that the firmware gets downloaded to the USRP, since the one light keeps on flashing quite fast. When I issue ls -lR /dev/bus/usb | grep usrp, I get crw-rw 1 root usrp 189, 516 Feb 20 17:59 005. Thanks a lot. Sebastiaan ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
