Re: [Discuss-gnuradio] Measuring performance of module

Have a look at the performance counters, and especially the graphical monitor, gr-perf-monitorx. It does quite exactly what you describe. Best regards, Marcus On 06/12/2015 05:01 AM, Jeon wrote: > My OOT module seems to be almost done in implementation. > > I am wondering that which and how perf

[Discuss-gnuradio] terminate called after throwing an instance of 'std::invalid_argument'

Hello Everyone When I run AM radio GRC, I got this error terminate called after throwing an instance of 'std::invalid_argument' what(): buffer_add_reader: nzero_preload must be >= 0 I google this error, and it says this is bug 693. but I cannot fix it. Thank you! Shaun AM_test.grc

[Discuss-gnuradio] Measuring performance of module

My OOT module seems to be almost done in implementation. I am wondering that which and how performance metric can be measured. I am considering the basic communication performance metrics such as throughput, BER/PER vs SNR. And such metrics are rather easy to measure. So there are not what I have

[Discuss-gnuradio] Fwd: Problem using fm_demod.py

Hi everyone, I recently started playing around with gnuradio, and being the beginner that I am, wanted to begin by listening to a close by radio station. I basically followed the instructions on http://www.trondeau.com/gr-tutorial/ and used the uhd_rx_cfile with the following command: *uhd_rx_cf

[Discuss-gnuradio] Problem using fm_demod.py

Hi everyone, I recently started playing around with gnuradio, and being the beginner that I am, wanted to begin by listening to a close by radio station. I basically followed the instruction on http://www.trondeau.com/gr-tutorial/ and used the uhd_rx_cfile with the following command: *uhd_rx_cfi

Re: [Discuss-gnuradio] Gnuradio FFT - Graph concatenation

Hello Hassaan, there's no way you get 32MHz of bandwidth over network mode -- for 16 bit samples, that's not even theoretically possible over gigabit ethernet. In fact, the E310's CPU will under no circumstances push that many samples per second in or out of the E310. Please make sure you actually

Re: [Discuss-gnuradio] Install GNURadio from Source

Thanks Tom I understand now. Everything is working again. One more question about the tags. When I install Master -> HEAD, the version in GRC (from help->about) is 3.7.7.1. Why is there a tag for version 3.7.8 in the repo, if its content is behind that of 3.7.7.1? Rich On Wed, Jun 10, 2015 at 4:

Re: [Discuss-gnuradio] Gnuradio FFT - Graph concatenation

On Jun 11, 2015, at 6:59, Hassaan Ahmad wrote: > I'm using USRP E310 and running uhd_fft.grc to acquire FFT spectrum from the > device in network mode, and then displays that with QT FFT GUI block. > > Setting a center frequency, I can get an instantaneous bandwidth of 32MHz > around the cent

Re: [Discuss-gnuradio] Gnuradio FFT - Graph concatenation

What you want is very specialized, so you'll probably have to write something of your own for this. Tom I want to amplify on this point. The number of "useful things" you might want to do with a real-time sample-stream in the context of DSP and radio is very, very large, nearly infinite, and

Re: [Discuss-gnuradio] Gnuradio FFT - Graph concatenation

On Thu, Jun 11, 2015 at 10:25 AM, Hassaan Ahmad wrote: > Thanks for the guidance. > > Can I do this message passing in GRC? Also, how would the bandwidths get > concatenated together and displayed in the same FFT graph? > Check out our tutorials on gnuradio.org for message passing help. In the F

Re: [Discuss-gnuradio] m.data in usrp_spectrum_sense.py

Hi Ashraf, > Oh I see. That can be done, I believe. Thank you so much for helping > me understand. You're welcome! > I do have another question about modify usrp_spectrum_sense.py And that would be? Greetings, Marcus ___ Discuss-gnuradio mailing list D

Re: [Discuss-gnuradio] Gnuradio FFT - Graph concatenation

Thanks for the guidance. Can I do this message passing in GRC? Also, how would the bandwidths get concatenated together and displayed in the same FFT graph? On Jun 11, 2015 7:08 PM, "Tom Rondeau" wrote: > On Thu, Jun 11, 2015 at 9:59 AM, Hassaan Ahmad > wrote: > >> Hi, >> >> I'm using USRP E310

Re: [Discuss-gnuradio] Gnuradio FFT - Graph concatenation

On Thu, Jun 11, 2015 at 9:59 AM, Hassaan Ahmad wrote: > Hi, > > I'm using USRP E310 and running uhd_fft.grc to acquire FFT spectrum from > the device in network mode, and then displays that with QT FFT GUI block. > > Setting a center frequency, I can get an instantaneous bandwidth of 32MHz > arou

Re: [Discuss-gnuradio] m.data in usrp_spectrum_sense.py

ah! the meaning of m.data is explained a few lines before, line 284[1]: > m.data are the mag_squared of the fft output As I explained, the value that gets displayed is just the squared magnitude of the FFT -- that means that values displayed are somehow proportional to the powers in individual fr

[Discuss-gnuradio] Gnuradio FFT - Graph concatenation

Hi, I'm using USRP E310 and running uhd_fft.grc to acquire FFT spectrum from the device in network mode, and then displays that with QT FFT GUI block. Setting a center frequency, I can get an instantaneous bandwidth of 32MHz around the center frequency. (for me it's the maximum in network mode) N

Re: [Discuss-gnuradio] gnuradio and qt

On Thu, Jun 11, 2015 at 4:29 AM, Volker Schroer wrote: > Support for qt4 will end at the end of this year. I think this is not a > real problem at the moment, but are there plans to migrate to qt5 ? > > Thanks > > -- Volker > Yes, there are. Tom ___ D

Re: [Discuss-gnuradio] m.data in usrp_spectrum_sense.py

m.data is what they use to calculate power_db (i.e. power_db = 10* math.log10(m.data[i_bin]/tb.usrp_rate) - noise_floor_db) from this code https://github.com/gnuradio/gnuradio/blob/master/gr-uhd/examples/python/usrp_spectrum_sense.py line 303. How would I calibrate my system with an external signa

Re: [Discuss-gnuradio] USRP Handshake

Hi Surya, > I use access code from packet decoder That sounds like a good approach; you should have told us earlier! > Problem is when I start the Rx's fg the file sink immediately write file output even Tx's fg not run. this means that the access code checking doesn't work. Best regards, Marc

Re: [Discuss-gnuradio] USRP Handshake

I want to transmitted digital file (i.e. .jpg) with file source on Tx side then received the file with file sink. It's not about "silence or noise" because I use access code from packet decoder, the problem is when I start the Rx's fg the file sink immediately write file output even Tx's fg not run

[Discuss-gnuradio] gnuradio and qt

Support for qt4 will end at the end of this year. I think this is not a real problem at the moment, but are there plans to migrate to qt5 ? Thanks -- Volker ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/list