Re: [Discuss-gnuradio] Re: Soft-DVB DVB-T transmitter
Hello people, I'm following the discussion about the Soft-DVB, and I'm thinking about use of the WBX0510 daughterboard (50 MHz to 1 GHz) w/ Soft-DVB - Will then be possible to transmitt in any VHF/UHF channel? Bye, Rafael Diniz Em Tuesday 11 November 2008, Vincenzo Pellegrini escreveu: Martin , sorry for the delay. My exams seem to have gone well even if it's not official yet. I also had to do a demo for a company I have a temporary contract with for developing some gnuradio based gsm-r security sentinels. Also the demo was smooth. (i already listed the project on the gnuradio wiki) so i really hope i'll be able to prepare the 8Mhz stream for you within the next 2/3 days. Would this still be useful? 2008/11/3, Martin DvH [EMAIL PROTECTED]: On Mon, 2008-11-03 at 14:13 +0100, Martin DvH wrote: Van: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Namens Vincenzo Pellegrini Verzonden: maandag 3 november 2008 0:16 Aan: Martin DvH CC: discuss-gnuradio Onderwerp: [Discuss-gnuradio] Re: Soft-DVB DVB-T transmitter This is Great... :) Yup, the playback cannot be smooth because of the wrong throughput, definitely. Did you use the USRP1 with interpolation factor = 16 ? Yes I did. I can prepare a modulated signal with the correct throughput for you.. this is not a problem... :) Please do, this would be great. what hard disc are you playing your signal back from? Internal 2.5 harddisk of my acer 6930 notebook (Aspire 6930G-734G32BN LX.AVB0X.135) 2.5 320GB HDD 5400rpm, SATA I checked now. It is a: Western digital Scorpio 320 GB SATA (WDC WD3200BEVT-22ZCT0) 2.5-inch SATA Hard Drive 320 GB, 3 Gb/s, 8 MB Cache, 5400 RPM Benchmark from tomshardware (h2benchw 3.6): http://www.tomshardware.com/charts/2-5-hard-drive-charts/Minimum-Read-Tra nsfer-Performance,687.html minimum read transfer rate 33.5 MB/sec average read transfer rate 52.2 MB/sec maximum read transfer rate 68.2 MB/sec I am not at home right now So I can't check the exact brand and model of the harddisk. It can do around 38 MB/sec so this is just enough (required 32 MB/sec) I also have 4GB of memory in this notebook, so I think it will buffer the complete file. I had to use my notebook because with my desktop PC (ASrock 939-DUAL-SATA2) The USB TX bandwidth is less then 32 MB/sec. (Which is strange because I CAN receive 32 MB/sec) I get UuUuUu on this machine when useing interpolation 16, so unusable. Regards, Martin regards vincenzo 2008/11/3 Martin DvH [EMAIL PROTECTED] Hi, In fact: 8 complex Msps implement a 7 MHz channel while 9.142857143 complex Msps implement an 8 MHz channel. Just try to go as close as possible to such sampling frequency by using USRP2 and let me know what happens... it could turn out that we need a resampler block. So if I use a fractional rate resampler with interpolation factor 10/8=1.25 I get a 7 Mhz channel with 10 Msps samplerate. If I use a fractional rate resampler with interpolation factor 10/9.142857143=1.09375 I get a 8 Mhz channel with 10 Msps samplerate If I use a fractional rate resampler with DECIMATION factor 9.142857143/8=8/7=1.142857143 I get a 8 Mhz channel with 8 Msps samplerate with the out-of-band skirts folded back at the sides. Would be interesting to see if this last one works with a USRP1. I'll let you know how the experiments go. I resampled and scaled your ofdm_40.dump file so it now will use 8 Mhz bandwidth with a 8 Msps samplerate. The reception never can be perfect this way but it seems good enough for tests. My USB DVB-T receiver receives the transport stream without problems. Mplayer playes the stream without problem for two loops and then crashes with a broken frame. My standalone settopbox DVB-T receiver now also receives the stream. (8 MHz channel on UHF) It has big problems displaying it. Sound is only a chop of sound now and then and video stops, then runs for a second, then stops again. I think this is because the timestamps and framerate (playout speed) don't match the data throughput of the MPEG stream anymore. (It is getting the stream too fast) I put my resampled RF file at: http://www.olifantasia.com/projects/gnuradio/mdvh/OTA/DVB-T/ofdm_40_bw8M hz_s amplerate_8Msps_cshort.raw format is complex signed short integers (I 16 bit, Q 16 bit) at 8 Msamples/sec.
Re: [Discuss-gnuradio] URSP/Gnuradio for amateur radio usage
That one is nice. but the price is not that good, and the software runs on Windows... (of course we could write the driver to gnuradio). btw, back to our ursp/gnuradio, a friend that works w/ RF will try to design a board that conects to the LFTX w/ the stuff needed to transmit SSB and so on. If I get something, I email to the list. I already transmitted from gnuradio to a 2m amateur radio without any add-on, just the standard BasicTX. :) bye, rafael diniz Em Wednesday 29 October 2008, Robert Tiller escreveu: The transmitter is being designed now... From the QS1R Yahoo group: The SRL QS1R features expandability with an I2C and SPI/Microwire expansion bus. Also planned is a PCI interface version of the QS1R with accompanying DAC/transmitter board as well as various VHF/UHF/Microwave add-on boards. On Wed, Oct 29, 2008 at 5:34 PM, Gregory Maxwell [EMAIL PROTECTED] wrote: On Wed, Oct 29, 2008 at 6:23 PM, Robert Tiller [EMAIL PROTECTED] wrote: And do not forget the new QS1 http://www.philcovington.com/QuickSilver/ I guess it's helpful to see some validation of USRP2 pricing. :) (It looks like a RX only USRP2 plus USB2.0 bottleneck, minus external refclock) An RX only device doesn't meet Rafael's interest though: Anyone working on a GNU Radio driver for this thing? -- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- Ciência da Computação @ Unicamp Rádio Muda, radiolivre.org, TV Piolho, tvlivre.org, www.midiaindependente.org Chave PGP: http://pgp.mit.edu:11371/pks/lookup?op=getsearch=0x2FF86098 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- signature.asc Description: This is a digitally signed message part. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] URSP/Gnuradio for amateur radio usage
thats true Chris, Thanks for the information. but none runs gnuradio, usually PowerSDR is used. bye, rafael diniz Em Monday 27 October 2008, Chris Albertson escreveu: On Mon, Oct 27, 2008 at 8:36 PM, rafael2k [EMAIL PROTECTED] wrote: There are others SDR radios out there that were made for amateurs, like Flex5000, softrock and others, but they all use a stereo sound cable connected to the PC soundcard as interface (at most 96kHZ and 20kHz bandwidth), ..., ursp is much more powerfull. There are exceptions to your they all use a stereo sound cable rule. One that you might want to look at is here http://hpsdr.org/ There are several sub projects within HPSDR. Look at both of these: http://hpsdr.org/mercury.html http://hpsdr.org/penelope.html -- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- Ciência da Computação @ Unicamp Rádio Muda, radiolivre.org, TV Piolho, tvlivre.org, www.midiaindependente.org Chave PGP: http://pgp.mit.edu:11371/pks/lookup?op=getsearch=0x2FF86098 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- signature.asc Description: This is a digitally signed message part. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] URSP/Gnuradio for amateur radio usage
Thanks Johnathan, I'll try to get such amplifier and probably a passband filter. I send the schematics to the list If I get something working. There are others SDR radios out there that were made for amateurs, like Flex5000, softrock and others, but they all use a stereo sound cable connected to the PC soundcard as interface (at most 96kHZ and 20kHz bandwidth), ..., ursp is much more powerfull. bye, Rafael Diniz Em Monday 27 October 2008, Johnathan Corgan escreveu: On Sun, Oct 26, 2008 at 9:08 PM, rafael2k [EMAIL PROTECTED] wrote: I'd like to know the output power I can get from a usrp 1, and if someone has any experience with this kind of experiment, like what amplifiers to use, what filters, and things like that. The maximum USRP1 output using the LFTX board is approximately 2V P-P into 50 ohms, or about 10 milliwatts rms. Depending on your waveform peak to average ratio, your rms power will be less. On TX, to get to say, a max of 5W for QRP operation, you'd need a PA with at least 27 dB of gain. For operation with SSB, this would have to be a linear amplifier. For CW only, you could use a non-linear PA which would be easier to design. The LFRX board has no gain, and essentially just provides anti-aliasing filtering and impedance matching between the input at 50 ohms and the analog-to-digital converter input circuitry. You can think of it as having roughly a 55dB noise figure, so you'd need at least that much external low-noise amplification to get any sort of useful weak signal reception.(The 55dB figure was from an empirical measurement with a signal generator; YMMV.) Since the ADC is digitizing the entire 0-30 MHz spectrum, it would be essential to have a band filter ahead of the amplification, in order to avoid strong out-of-band signals limiting the amount of gain you could use. In addition, you'd want some sort of analog AGC. Anyway, it's obvious the LFRX and LFTX were designed as baseband interface cards, not as an HF receiver or transceiver. Still let us know what you come up with. It's certainly possible, given the open design of the USRP1/USRP2, that you or someone else could design customer daughterboards that incorporate some or all of the above. -Johnathan (AE6HO) -- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- Ciência da Computação @ Unicamp Rádio Muda, radiolivre.org, TV Piolho, tvlivre.org, www.midiaindependente.org Chave PGP: http://pgp.mit.edu:11371/pks/lookup?op=getsearch=0x2FF86098 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- signature.asc Description: This is a digitally signed message part. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] URSP/Gnuradio for amateur radio usage
Hello people, I'm aiming to transmitt in some amateur radio bands, especially the 40m band. The bands that LFRX and LFTX can cover are (considering the 30MHz lowpass filter): 1.8, 3.5, 5, 7, 10.1, 14, 21, 24.89, 28 MHz I know gnuradio can do SSB and CW modulation :) I'd like to know the output power I can get from a usrp 1, and if someone has any experience with this kind of experiment, like what amplifiers to use, what filters, and things like that. Thanks, Rafael Diniz -- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- Ciência da Computação @ Unicamp Rádio Muda, radiolivre.org, TV Piolho, tvlivre.org, www.midiaindependente.org Chave PGP: http://pgp.mit.edu:11371/pks/lookup?op=getsearch=0x2FF86098 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- signature.asc Description: This is a digitally signed message part. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] rfx900 wiki edit
Hi Vince, Are you transmitting DVB w/ it? I'm in the hope to transmitt ISDB-T :) Bye, Rafael Diniz Em Tuesday 05 August 2008, Vincenzo Pellegrini escreveu: I was planning to edit the RFX900 wiki page like this, as promised in my previous email requiring info RFX900 gain I thought to submit the modification to the list before doing it thanks vincenzo = USRP Daugherboard: RFX900 = '''Specifications'''[[BR]] __RX__: 800MHz - 1000MHz [[BR]] __TX__: 800MHz - 1000MHz @ 200+mW [[BR]] http://www.ettus.com/images/Flex900.jpg The board features an ISM band filter that suppresses the RF signal outside the 902-928 MHz band and attenuates it within such band by one dB or two. If usage of the board outside the ISM band is required, the filter can be bypassed by cutting the traces to the filter FIL.1 and soldering a 100pF capacitor in parallel to it. -- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- Ciência da Computação @ Unicamp Rádio Muda, radiolivre.org, TV Piolho, tvlivre.org, www.midiaindependente.org Chave PGP: http://pgp.mit.edu:11371/pks/lookup?op=getsearch=0x2FF86098 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- signature.asc Description: This is a digitally signed message part. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] gnuradio .py applications
Hi, I'd like to know if there is some other source of .py (for ursp especially) than the official svn. Sometimes I see people discussing about some .py I don't have. Thanks a lot, Rafael Diniz -- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- Ciência da Computação @ Unicamp Rádio Muda, radiolivre.org, TV Piolho, tvlivre.org, www.midiaindependente.org Chave PGP: http://pgp.mit.edu:11371/pks/lookup?op=getsearch=0x2FF86098 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- signature.asc Description: This is a digitally signed message part. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] using gnuradio as a amateur radio
Hi all, I'm using gnuradio to receive and transmit to 2 meters amateur radio, and when I went to buy the cable, I didn't know what impedance should I use w/ the usrp. 50 ohm or 75 ohm? Can I connect an amplifier to the basic-tx without any problem? thanks rafael diniz -- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- Ciência da Computação @ Unicamp Rádio Muda, radiolivre.org, TV Piolho, tvlivre.org, www.midiaindependente.org Chave PGP: http://pgp.mit.edu:11371/pks/lookup?op=getsearch=0x2FF86098 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- signature.asc Description: This is a digitally signed message part. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Which version of Linux is the most convenient, SuSE or Fedora or ...
Em Thursday 08 May 2008, Steve Totaro escreveu: On Thu, May 8, 2008 at 2:10 PM, Roshan Baliga [EMAIL PROTECTED] wrote: Zhenghao Zhang wrote: I am new to GNU radio and I was wondering which version of Linux you use. Is it SuSE or Fedora? I just want to know which is the most popular version of Linux for gnu radio such that I would have less problems working on it. I have a PC with CentOS and I cannot install gnu radio on it fully. Thanks very much for your time. This page http://gnuradio.org/trac/wiki/BuildGuide#OperatingSystemSpecificInstructi ons Includes direction for various flavors of GNU/Linux. My personal experience is that Ubuntu and Fedora are fairly easy to use with gnuradio. -Roshan The distro instructions always failed in some way or another for me. Not that I could not run gnuradio, but certain dependencies for modules almost always failed. FC8 rocks now that gnuradio is in the repos. It is as easy as yum install gnuradio to install gnuradio using slackware 12.1: wget http://slack.sarava.org/packages/noarch/simplepkg-0.6pre27-noarch-1rha.tgz installpkg simplepkg-0.6pre27-noarch-1rha.tgz wget ftp://ftp.slackware.com/pub/slackware/slackware-12.1/extra/slacktrack/slacktrack-1.32-i486-1.tgz installpkg slacktrack-1.32-i486-1.tgz createpkg --sync createpkg -i gnuradio if you want to review the bash scripts that made the packages, take a look at: /var/simplepkg/slackbuilds /var/simplepkg/slackbuilds/media/radio/gnuradio or, via web: http://slack.sarava.org/slackbuilds/ http://slack.sarava.org/slackbuilds/media/radio/gnuradio/ bye, rafael diniz -- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- Ciência da Computação @ Unicamp Rádio Muda, radiolivre.org, TV Piolho, tvlivre.org, www.midiaindependente.org Chave PGP: http://pgp.mit.edu:11371/pks/lookup?op=getsearch=0x2FF86098 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- signature.asc Description: This is a digitally signed message part. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Latest publications: about DAB and Soft-DVB
Ciao Vincenzo, Grazie! Is the video link correct? Rafael Diniz Em Tuesday 06 May 2008, Vincenzo Pellegrini escreveu: Hi Rafael, you can find the paper here: http://wwvince.interfree.it/PellegriniBacciLuise_WSR08_CR.pdf thanks for your interest. soon (one or two days) there will also be a video of the presentation in Karlsruhe (including a live Soft-DVB demonstration) here: www.legalepellegrini.it/Soft-DVB-Karlsruhe.mp4 2008/5/6 rafael2k [EMAIL PROTECTED]: Hi all, Can anyone make available the OFDM / DAB implementation by Jens Elsner, which original location was: - http://www.1c3.de/gr-dab.tar.bz2 There is also a paper called: - V. Pellegrini, G. Bacci, M. Luise, Soft-DVB, a Fully Software, GNURadio Based ETSI DVB-T Modulator, in Proc. WSR'08, Karlsruhe, Germany, March 2008 Can it be accessible via any University Online Library? -- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- Ciência da Computação @ Unicamp Rádio Muda, radiolivre.org, TV Piolho, tvlivre.org, www.midiaindependente.org Chave PGP: http://pgp.mit.edu:11371/pks/lookup?op=getsearch=0x2FF86098 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- signature.asc Description: This is a digitally signed message part. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Latest publications: about DAB and Soft-DVB
Hi all, Can anyone make available the OFDM / DAB implementation by Jens Elsner, which original location was: - http://www.1c3.de/gr-dab.tar.bz2 There is also a paper called: - V. Pellegrini, G. Bacci, M. Luise, Soft-DVB, a Fully Software, GNURadio Based ETSI DVB-T Modulator, in Proc. WSR'08, Karlsruhe, Germany, March 2008 Can it be accessible via any University Online Library? Thanks, Rafael Diniz @ Campinas University PGP Key: http://pgp.mit.edu:11371/pks/lookup?op=getsearch=0x2FF86098 signature.asc Description: This is a digitally signed message part. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] GNU Radio in Fedora repo
if it's interesting for anyone, We, at slack.sarava.org did SlackBuilds for gnuradio and grc for Slackware (along w/ it's dependencies): http://slack.sarava.org/slackbuilds/media/radio/ bye, rafael diniz Em Sunday 04 May 2008, Steve Totaro escreveu: On Sun, May 4, 2008 at 11:15 AM, Eric Blossom [EMAIL PROTECTED] wrote: On Sun, May 04, 2008 at 04:19:16PM +0200, Trond Danielsen wrote: GNU Radio and related tools are now available from the Fedora repository which should get you up and running in no time :-) Regard, -- Trond Danielsen That's great news Trond! Thanks! Eric Very NICE! I am yumming it right now on FC8 (28M). Thanks Trond. Steve Totaro -- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- Ciência da Computação @ Unicamp Rádio Muda, radiolivre.org, TV Piolho, tvlivre.org, www.midiaindependente.org Chave PGP: http://pgp.mit.edu:11371/pks/lookup?op=getsearch=0x2FF86098 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- signature.asc Description: This is a digitally signed message part. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
