[Discuss-gnuradio] WInnForum SDR Design Challenge -- entries due 17 February, projects in progress welcome

2012-01-31 Thread cdietric
The Wireless Innovation Forum invites entries for the Software-Defined Radio Design Challenge, a student design contest. This contest is an activity of the Forum's Educational Special Interest Group. The competition will take place on May 31, 2012 at the Wireless@Virginia Tech Symposium on

Re: [Discuss-gnuradio] software for antenna designers

2012-01-31 Thread Andrew Davis
Well the core ( nec2 ) is open source and so runs on linux, but your GUI ( EZNEC+ ) is not. You could try Wine, I believe 4nec2 works well with it, 4nec2 is a much more advanced program too. On Tue, Jan 31, 2012 at 7:48 PM, Patrik Tast wrote: > ** > Hi All, > > Do you know of an/any antenna softw

Re: [Discuss-gnuradio] Unable to receive using USRP N210, XCVR2450 daughterboards running benchmark programs

2012-01-31 Thread Marcus D. Leech
On 31/01/12 09:53 PM, shantharam balasubramanian wrote: > When the transmitter was producing the dots, are you 100% sure that > the packets were gettting transmitted in the first place? > > cause i used spectrum analyser and i ran uhd_fft.py, and saw that no > signals were peaking up on that partic

Re: [Discuss-gnuradio] Unable to receive using USRP N210, XCVR2450 daughterboards running benchmark programs

2012-01-31 Thread shantharam balasubramanian
When the transmitter was producing the dots, are you 100% sure that the packets were gettting transmitted in the first place? cause i used spectrum analyser and i ran uhd_fft.py, and saw that no signals were peaking up on that particular frequency. Even Tom had the same doubt when he visited my la

Re: [Discuss-gnuradio] Unable to receive using USRP N210, XCVR2450 daughterboards running benchmark programs

2012-01-31 Thread You Lizhao
Hi Dhrubojyoti, I also observed the same experimental results, i.e., (1) fail to receive packets using benchmark programs; (2) 1MHz shift with XCVR2450 daughterboard. Sometimes, the wider bandwidth (or higher sample rate) and shifted central frequency help. Regards, Lizhao 2012/1/9 Dhrubojyoti

Re: [Discuss-gnuradio] reg problem in running gnuradio 3.5 benchmark programs

2012-01-31 Thread shantharam balasubramanian
Hi I just want to list down the commands I used to run the benchmark programs. ./benchmark_tx.py -f 2.4G -r 1M --args "addr=192.168.10.2". In addition I also gave the option [-A J1] to select the antenna to transmit. But I couldnt detect any transmitted signal from that node. I also ran uhd_fft

Re: [Discuss-gnuradio] Running tunnel.py/benchmark_tx.py (OFDM) with XCVR2450?

2012-01-31 Thread Marcus D. Leech
On 01/31/2012 08:21 PM, Andrew Davis wrote: That's kinda odd now that I think about it, I had a similar problem and on an oscilloscope it looked like DAC clipping, but I could have been non-linearity in the final amp, what kind of problems do XCVR2450 have at high outputs? All amplifiers will

Re: [Discuss-gnuradio] Running tunnel.py/benchmark_tx.py (OFDM) with XCVR2450?

2012-01-31 Thread Andrew Davis
That's kinda odd now that I think about it, I had a similar problem and on an oscilloscope it looked like DAC clipping, but I could have been non-linearity in the final amp, what kind of problems do XCVR2450 have at high outputs? On Tue, Jan 31, 2012 at 9:00 AM, Marcus D. Leech wrote: > ** > On

[Discuss-gnuradio] software for antenna designers

2012-01-31 Thread Patrik Tast
Hi All, Do you know of an/any antenna software you would use for linux that does like EZNEC+ v5.0 (licenced) http://www.eznec.com/ Patrik___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

[Discuss-gnuradio] reg problem in running gnuradio 3.5 benchmark programs

2012-01-31 Thread shantharam balasubramanian
Hi I installed gnuradio 3.5 images in my college lab, and I installed the appropriate SD card image for it. I then tried to run the benchmark programs, by running the benchmark_tx and rx in two different nodes that have USRP2, with daughter boards, XCVR 2450 in them. But I saw that the benchmark

Re: [Discuss-gnuradio] Down for everyone? A Yup, seems to be

2012-01-31 Thread Johnathan Corgan
On Tue, Jan 31, 2012 at 16:33, Philip Balister wrote: > Looks a bit sluggish here also . The server CPU and memory load on gnuradio.org has been steadily increasing since Tom and I moved it to Amazon Web Services hosting last June. We're beginning to max out the instance type we chose back

Re: [Discuss-gnuradio] Down for everyone? A Yup, seems to be

2012-01-31 Thread Philip Balister
Looks a bit sluggish here also . On 01/31/2012 06:49 PM, Marcus D. Leech wrote: > www.gnuradio.org appears to be down (and no, it's not just me :-) ) > > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/lis

[Discuss-gnuradio] Down for everyone? A Yup, seems to be

2012-01-31 Thread Marcus D. Leech
www.gnuradio.org appears to be down (and no, it's not just me :-) ) -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org

Re: [Discuss-gnuradio] Running tunnel.py/benchmark tx.py (OFDM) with XCVR2450?

2012-01-31 Thread Josh Blum
On 01/31/2012 02:48 PM, Florian Schlembach wrote: > Ok, that definitely makes sense if there is no error correction is > implemented. > > We are now trying to establish an TCP/IP connection between both USRP2s > with the tunnel.py script. > Unfortunately, it says "Destination Host unreachable"

Re: [Discuss-gnuradio] Running tunnel.py/benchmark tx.py (OFDM) with XCVR2450?

2012-01-31 Thread Florian Schlembach
Ok, that definitely makes sense if there is no error correction is implemented. We are now trying to establish an TCP/IP connection between both USRP2s with the tunnel.py script. Unfortunately, it says "Destination Host unreachable" when pinging the other USRP. We should have set up the tunnel

[Discuss-gnuradio] Effect of having multiple throttle in a chain of flowgraph

2012-01-31 Thread محمد روسلي
Hi, I would like to ask what happen if there are many block of throttle connected between a source and a sink in pure simulation? I notice the GUI Interface (wxgui) is getting slow when 5 throttle block is connected between a signal source and signal probe sink. | Signal Block | ---> | Throttle |

Re: [Discuss-gnuradio] Error while running std examples max_power.py, bert : boost::math::round(d): Value -nan

2012-01-31 Thread Josh Blum
>> > Just the frequency option (-f 2440M). > > -Shalabh I am suspecting a possible issue with an initialized variable. Do you mind trying this little patch: http://www.pastebucket.com/1402 -Josh ___ Discuss-gnuradio mailing list Discuss-gnuradio@gn

Re: [Discuss-gnuradio] Question !

2012-01-31 Thread Marcus D. Leech
On 31/01/12 04:38 PM, Javier Suarez wrote: > Good morning, > My name is Javier Mauricio Suarez, I am a student of electronics > engineering at Santander Industrial University in Colombia. I am > working with the USRP1 and GNU Radio for my graduate project. Some > days ago I had a problem that I hav

Re: [Discuss-gnuradio] Error while running std examples max_power.py, bert : boost::math::round(d): Value -nan

2012-01-31 Thread Shalabh Jain
On Tue, Jan 31, 2012 at 7:54 AM, Marcus D. Leech wrote: > ** > On 31/01/12 01:24 AM, Shalabh Jain wrote: > > >> > > Just the frequency option (-f 2440M). > > -Shalabh > > My suspicion is that you're not using the version of Gnu Radio you think > you're using, and there's an > ABI difference betw

Re: [Discuss-gnuradio] Running tunnel.py/benchmark_tx.py (OFDM) with XCVR2450?

2012-01-31 Thread Marcus D. Leech
On 31/01/12 08:28 AM, Florian Schlembach wrote: >> But fiddling with gain values is often useful; even if you've already >> done that I recommend trying again, by reducing tx-amplitude and the >> actual gain values, shifting the terminals around (perhaps they're too >> close?). >> > We have no

Re: [Discuss-gnuradio] Running tunnel.py/benchmark_tx.py (OFDM) with XCVR2450?

2012-01-31 Thread Marcus D. Leech
On 31/01/12 08:37 AM, Andrew Davis wrote: > >One thing that I noticed was that the --tx-amp=0.8. That's very high > for OFDM with it's large PAPR. > > I'm thinking that too, there really should be some kind of warning > when you drive the DAC to saturation. It's not the DAC that's typically the pro

Re: [Discuss-gnuradio] Updating the BBN_80211

2012-01-31 Thread Tom Rondeau
On Fri, Jan 27, 2012 at 4:20 PM, NeoEcko wrote: > > Hi all, > > I am new at the GNU Radio and UHD Fields. > I have recently begin to make some modifications at the bbn_80211 code > (which is compatible with the GNU Radio's 3.1.1 release) to make it run > with uhd and USRP N2X0. > > But when modif

Re: [Discuss-gnuradio] Running tunnel.py/benchmark_tx.py (OFDM) with XCVR2450?

2012-01-31 Thread Andrew Davis
>One thing that I noticed was that the --tx-amp=0.8. That's very high for OFDM with it's large PAPR. I'm thinking that too, there really should be some kind of warning when you drive the DAC to saturation. If you need more range use an external amp. On Tue, Jan 31, 2012 at 8:28 AM, Tom Rondeau

Re: [Discuss-gnuradio] Running tunnel.py/benchmark_tx.py (OFDM) with XCVR2450?

2012-01-31 Thread Tom Rondeau
On Mon, Jan 30, 2012 at 11:12 AM, Martin Braun wrote: > On Mon, Jan 30, 2012 at 04:11:05PM +0100, Florian Schlembach wrote: > > We have now extended our tests to the tests with two USRP2s with > > daughterboards: Neither the benchmark_tx.py example nor the tunnel.py is > > receiving any packets.

Re: [Discuss-gnuradio] Running tunnel.py/benchmark_tx.py (OFDM) with XCVR2450?

2012-01-31 Thread Tom Rondeau
On Tue, Jan 31, 2012 at 8:28 AM, Florian Schlembach < florian.schlemb...@tu-ilmenau.de> wrote: > > But fiddling with gain values is often useful; even if you've already > > done that I recommend trying again, by reducing tx-amplitude and the > > actual gain values, shifting the terminals around (p

Re: [Discuss-gnuradio] Running tunnel.py/benchmark_tx.py (OFDM) with XCVR2450?

2012-01-31 Thread Florian Schlembach
> But fiddling with gain values is often useful; even if you've already > done that I recommend trying again, by reducing tx-amplitude and the > actual gain values, shifting the terminals around (perhaps they're too > close?). We have now found out that we need a sampling rate of at least 2Msps wh

Re: [Discuss-gnuradio] Error while running std examples max_power.py, bert : boost::math::round(d): Value -nan

2012-01-31 Thread Marcus D. Leech
On 31/01/12 01:24 AM, Shalabh Jain wrote: > > > > > Just the frequency option (-f 2440M). > > -Shalabh My suspicion is that you're not using the version of Gnu Radio you think you're using, and there's an ABI difference between UHD and gr-uhd. After you re-built UHD and Gnu Radio, did you "sudo l

Re: [Discuss-gnuradio] trellis encoder and OFDM modulator

2012-01-31 Thread Friederike Maier
Hi I was also looking around the OFDM Modulation recently. Found this nice project here: http://people.csail.mit.edu/szym/rawofdm/README.html where ofdm mod and channel est are done separately. I didn't had the time to follow ths more...perhaps it helps. best, friederike On 01/20/2012 02:38 PM,