[Discuss-gnuradio] How to detect collision when two packets are transmitted simultaneously from two transmitters.

I have a setup of one receiver and two transmitters. I am implementing a TDMA structure (using USRPs and GNURADIO) where only one packet is sent in each slot. When both transmitters try to transmit in the same slot, collision occurs. I would like to know 1. How can the receiver detect whether a col

Re: [Discuss-gnuradio] Ubuntu 13.10 (Saucy Salamander) - runs from terminal, but not GRC

On Thu, Nov 7, 2013 at 6:52 PM, Tom McDermott wrote: > Hi Tom, thanks again for all your help. > > It runs from a terminal OK. > The missing Qwt5 error comes when trying to run it from GRC. > > -- Tom Ok, that's good news. It's likely that the problem is just in how you are launching GRC that mu

Re: [Discuss-gnuradio] python import error

On Fri, Nov 8, 2013 at 9:26 AM, nesimi eldarov wrote: > Dear all, > > I have a very old problem. I hope someone can help me: > > system: Ubuntu 13.04 > > I installed : > python 2.7.4 version by default > and > sudo apt-get install gnuradio >

Re: [Discuss-gnuradio] Ubuntu 13.10 (Saucy Salamander) - runs from terminal, but not GRC

Or set your PYTHONPATH in your .bashrc, and export it.   on Nov 08, 2013, Tom Rondeau wrote: On Thu, Nov 7, 2013 at 6:52 PM, Tom McDermott wrote:> Hi Tom, thanks again for all your help.>> It runs from a terminal OK.> The missing Qwt5 error comes when trying to run it fr

Re: [Discuss-gnuradio] How to detect collision when two packets are transmitted simultaneously from two transmitters.

Hi Sumedha, 1. You could perhaps look at the average power received over that time slot. If there is a collision, the receive power would ostensibly be higher. 2. Traditionally, a collision implied that nothing could be done, and the data was lost (unless one transmitter overwhelmed the other tra

Re: [Discuss-gnuradio] python import error

>> $ python -c 'from gnuradio import ftw' >> >> returns this error: >> >> Traceback (most recent call last): >> File "", line 1, in >> ImportError: cannot import name ftw >> -- >> I cannot import only this o

[Discuss-gnuradio] python import error

Dear all, I have a very old problem. I hope someone can help me: system: Ubuntu 13.04 I installed : python 2.7.4 version by default and sudo apt-get install gnuradio - I run this: $ python -c 'from gnuradi

Re: [Discuss-gnuradio] python import error

On Fri, Nov 8, 2013 at 9:57 AM, nesimi eldarov wrote: > >> $ python -c 'from gnuradio import ftw' >> >> returns this error: >> >> Traceback (most recent call last): >> File "", line 1, in >> ImportError: cannot import name ftw >> >>

Re: [Discuss-gnuradio] python import error

>> >> What are you trying to get with 'ftw'? That's not a GNU Radio component. >> >> Tom >> >> Hi Tom, >> >> I see, therefore it does not import. There is a project: >> https://www.cgran.org/wiki/ftw80211ofdmtx >> It installs FTW packages into gnuradio during installation. However it does >> not

Re: [Discuss-gnuradio] Ubuntu 13.10 (Saucy Salamander) - runs from terminal, but not GRC

Hi Tom,   It runs under GRC when GRC is launched from a terminal but not when launched from the desktop. So it's not getting the modified PYTHONPATH from gnome-session. Looked for gnuradio-companion.desktop file to place a PYTHONPATH, but couldn't find it.   Ultimately added ppa:borg/ppa to the

Re: [Discuss-gnuradio] GRCon '13 Hackfest Wrap-Up

On Sat, Oct 5, 2013 at 8:53 AM, Martin Braun (CEL) wrote: > Hi everyone, > > following GRCon '13, we had a one-day hackfest. A *lot* of people stayed > around for this, improving GNU Radio on all fronts. > > Since there has been a request to know what we did, I have started a > wiki page: > > http

Re: [Discuss-gnuradio] Status of GNU Radio with OSX 10.9

I just pushed < https://trac.macports.org/changeset/113092 >, which allows exactly what you wrote there Carles: just the C++ API and runtime. No SWIG Python or GRC. Python is used during the build, but not used for runtime. It should be live by ~1:30 PM/US/ET. I'm love to hear feedback from

Re: [Discuss-gnuradio] Status of GNU Radio with OSX 10.9

One further update: I played around with the SWIG provided includes for std, and it seems possible to tweak them to allow GNU Radio to be fully usable on 10.9. It's something that needs to come from upstream (the SWIG folks), since they need to "#ifdef CXX11" or something around the code. But,