[Discuss-gnuradio] Channel sounding in GNU Radio

Hello, I'm sending a specific frame (length 400 bits), and I would like to examine the received signal through the channel (delay profile, coherence time, ...). At the receiver, I have In Phase and Quadrature part. Is it a way to channel sounding ? Thanks to an existing library ? Thank you. Best

[Discuss-gnuradio] DRM receiver

Dear List! Does anyone have any experience with using GNURADIO as DRM receiver? Or using Dream as a library to gnuradio? Any help will be nice (= Best regards Havard Austad ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.

[Discuss-gnuradio] Bug in block::declare_sample_delay

Hello, I think that the declare_sample_delay (and/or the way it is used) is implemented incorrectly for interpolator blocks. Using GR 3.7.6. The delay should be added **after** scaling the offset by the interpolation ratio, not before. For example, using the filter.interp_fir_filter(4,[1,2,3,

[Discuss-gnuradio] DECT voice channel decoding project

Dear all, I was working on a project of real-time DECT voice channel decoding. I believe it might be useful for the community. So I have decided to share it. It is available on github with short installation and usage guide: https://github.com/pavelyazev/gr-dect2 -- Best Regards, Pavel Yazev --

Re: [Discuss-gnuradio] Tenth Special Cyberspectrum SDR Meetup next week in Washington, DC! (Wed 26th June)

If my time-machine gets back from the cleaners before yesterday, I'll certainly be there. Otherwise, August would work better for me. Wink wink nudge nudge its all fun until someone tries to occupy the same space/time and looses and eye. On Wed, Aug 19, 2015 at 7:06 PM, Balint Seeber wrote: > H

Re: [Discuss-gnuradio] GnuRadio: Clock Recovery MM: imu out of bounds

Hi Tom, Thanks for your answer. That's indeed something that I need to think about more. However, as I understand it, the samples per symbol rate is equal to (samp_rate / data_rate). My sample rate is 500k, and my data rate (i think) is only around 100 or 200. See this figure of my (cleaned) si

[Discuss-gnuradio] Filters in GNU Radio

Am I correct in concluding when I use fir_filter_fff to filter, that because it uses its own memory space, I don't need to use set_history and worry about boundary crossing between calls to work? Will the output of the filter behave as expected across work call boundaries if I keep passing samples

Re: [Discuss-gnuradio] Channel sounding in GNU Radio

Hi Caspar, Maybe gr-channelsounder https://github.com/gbaier/gr_channelsounder is of interest? Generally, that correlation channel sounder allows you to apply a signal that contains all frequencies to the channel and then lets you deduct the channel effect on your particular signal. Best regard

Re: [Discuss-gnuradio] Follow up: Failure to build GNU Radio on various Ubuntu builds

On 08/20/2015 04:01 PM, Mark wrote: mark@myGNURadioPC:~$ dpkg-query -l gcc Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Architect

Re: [Discuss-gnuradio] OOT Module Attribute Error module object has no attribute 'blockname'

One simple thing that can cause this is forgetting to do "sudo ldconfig" after you do your first "sudo make install" Various things can cause this, it's a cryptic error that I always hate seeing. Rich On Wed, Aug 19, 2015 at 11:51 AM, West, Nathan wrote: > My gut is telling me this is a swig p

Re: [Discuss-gnuradio] Help with building GNU Radio for Android

On Mon, Aug 17, 2015 at 7:28 PM, Schuyler St. Leger < schuyler.st.le...@gmail.com> wrote: > I am trying to build GNU Radio for Android and am having issues with the > build process. > > I first tried building GNU Radio for Android on Mac OS X 10.10.4. I was > able to follow the directions successf

Re: [Discuss-gnuradio] DRM receiver

I tried DRM TX using gr-drm created by KIT about two years ago. And it did transmit the right DRM signal and demodulated by Dream software correctly. Then I made a gnuradio flow to feed IQ samples into a fifo using wav file sink, then Dream opened this fifo and demodulate. This method is pretty h

Re: [Discuss-gnuradio] OOT Module Attribute Error module object has no attribute 'blockname'

Nathan and Patrick, Thanks for the tips! I started with running: nm -C -u libgnuradio-.so and the results of that can be found here: https://gist.github.com/loganwashbourne under the *nm -C -u libgnuradio-.so* file. (I think github t

Re: [Discuss-gnuradio] OOT Module Attribute Error module object has no attribute 'blockname'

Hi! You only seem to define a version of make with a char*parameter, but try to call it without parameters. Can you try doing something like ACK.Text_Sanitize("rubber ducky") ? Best regards, Marcus Am 19. August 2015 16:38:30 MESZ, schrieb "Washbourne, Logan" : >Hello all, > >I know this quest

Re: [Discuss-gnuradio] Implementing a FIR Filter

I got this working. For completeness, I'll answer my own questions and sum up what I've learned about filtering. 1) You need to call set_history(num_filter_taps) so that block boundaries are handled smoothly 2) You input samples one at a time to fir_filter_xxf 3) fir_filter_xxf does not store data

Re: [Discuss-gnuradio] Dealing with `divide 0` or `Inf` in GNU Radio C++ code.

Hi Jeff, you could use a strcture like this MA_divisor => Divide: % =>multiply => pad sink. |-> threshold detector-^ i.e. take the divisor path in parallel into threshold detector and use the output (in {0,1}) in a multiplier for masking the dividing by zero cases. By

Re: [Discuss-gnuradio] Follow up: Failure to build GNU Radio on various Ubuntu builds

Hi, as Marcus L. said, the logs are tremendously informative. A segfault in the cc1plus executable (which is the actual C++ compiler in GCC) is extremely seldom, and should be treated as either a bug in GCC, or a bug in your system. Now, I haven't seen an Out-Of-Memory error in a while, since RAM

Re: [Discuss-gnuradio] Implementing a FIR Filter

On Wed, Aug 19, 2015 at 2:17 PM, Richard Bell wrote: > I'm having some trouble getting my code to compile. I get the following > error: > > error: ‘kernel’ does not name a type > kernel::fir_filter_ccf *d_shape_filter; > > To my *_impl.h file I added the following: > #include > > privat

Re: [Discuss-gnuradio] Follow up: Failure to build GNU Radio on various Ubuntu builds

On 08/20/2015 09:33 AM, Mark wrote: Here is another error. The errors are many and I could keep posting variations of these to you and I'm not sure what purpose they would serve in finding a solution. Anyway, I will post this error and await your advice before trying again. The next attempt w

Re: [Discuss-gnuradio] ofdm mod error

i've noticed that the digital_swig causes some error for both... looking at it, there is nothing inside the digital_swig.py file... is that ok? -- Posted via http://www.ruby-forum.com/. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https:

Re: [Discuss-gnuradio] OOT Module Attribute Error module object has no attribute 'blockname'

Hi Logan, I have faced the same error twice recently in my OOT module and finally tracked it down to two causes. The basic reason for the 'object has no attribute' error is that Python's import of your module failed. In the two cases that I saw it was due to undefined symbols in the shared libra

Re: [Discuss-gnuradio] DRM receiver

Hi Havard, for transmission, gr-drm might be the way to go[1]. But since you asked for reception: I wouldn't know of integration of dream into GNU Radio so far. However, if I'm not mistaken, dream can use both a sound card for IF input as well as for baseband IQ input -- and with a sufficient amou

Re: [Discuss-gnuradio] Follow up: Failure to build GNU Radio on various Ubuntu builds

On 08/20/2015 06:13 AM, Mark wrote: OK, I changed the distro to Ubuntu 14.04.3 LTS 64Bit and followed your advice to simply issue the command "wget http://www.sbrac.org/files/build-gnuradio && chmod a+x ./build-gnuradio && ./build-gnuradio --verbose" and I find myself right back where I started

Re: [Discuss-gnuradio] GnuRadio: Clock Recovery MM: imu out of bounds

On Thu, Aug 20, 2015 at 3:09 AM, Michael B wrote: > Hi Tom, > > Thanks for your answer. That's indeed something that I need to think about > more. However, as I understand it, the samples per symbol rate is equal to > (samp_rate / data_rate). My sample rate is 500k, and my data rate (i think) > i

Re: [Discuss-gnuradio] [RFNoC] Tutorials @GRCon15

Dear all, we've tried our best to find more space + hardware and have added 6 more slots to the tutorial. You can register through the same page as before. Again, it's first come, first serve, so hurry if you want to get those slots! Cheers, Martin On 28.07.2015 19:52, Martin Braun wrote: > Hey

Re: [Discuss-gnuradio] OOT Module Attribute Error module object has no attribute 'blockname'

Marcus, Thanks for the reply! So I made the make function parameterless and removed the instances of that parameter throughout my code, tried to run the GRC again and got the same error as before. I then changed the: self.ACK_Text_Sanitize_0 = ACK.Text_Sanitize() to: self.ACK_Text_Sanitize_0 = AC

Re: [Discuss-gnuradio] [USRP-users] [RFNoC] Tutorials @GRCon15

As a brief reiteration and follow-up regarding registration for this tutorial: In order to register for the RFNoC tutorial, you must be registered for the Developers Conference -- not just New Developers Day. If you have already registered for the Developers Conference, then you can just register f

Re: [Discuss-gnuradio] Filters in GNU Radio

After looking through the manual, I see there is a buffer version of fir filter. Documentation is pretty light on these, but I'm guessing my previous email is not correct. The delay line values in the non-buffered filter are not stored in the memory space created when we called new kernel::fft_filt

[Discuss-gnuradio] Tenth Special Cyberspectrum SDR Meetup next week in Washington, DC! (Wed 26th June)

Hi all, We're pleased to announce the Tenth Special Cyberspectrum meetup, which will be held in Washington, DC, during the week of the 2015 GNU Radio conference: http://www.meetup.com/Cyberspectrum/events/224333749/ Please RSVP if you're coming along!

Re: [Discuss-gnuradio] Tenth Special Cyberspectrum SDR Meetup next week in Washington, DC! (Wed 26th June)

Thanks Ashworth. Have you got space for one more?! Dear all, Bit of copy-pasta. It's next week, being the last week of *August.* Balint On Wed, Aug 19, 2015 at 9:08 PM, Ashworth Payne wrote: > If my time-machine gets back from the cleaners before yesterday, I'll > certainly be there. Otherwis

[Discuss-gnuradio] GRCon15 next week!

Hey everyone, I wanted to send a final note about GRCon15 coming up in DC next week. We have an incredibly lineup of speakers throughout the week and an audience to match. We still have space available this year as we made sure to get a larger event room. All the details are on the website, though

Re: [Discuss-gnuradio] Implementing a FIR Filter

I have a fundamental misunderstanding of the filter system in gnuradio. I would appreciate some help. I wrote a simple C++ testbench to help me figure out what's going on, but it continues to not behave as I expect. I am using fir_filter_fff with 29 taps that I set. I send an impulse into the filte

Re: [Discuss-gnuradio] Follow up: Failure to build GNU Radio on various Ubuntu builds

On 08/20/2015 03:13 PM, Mark wrote: Apologies, I didn’t see this at the foot of your Email. I will study it later tonight or at the weekend. Many grateful thanks again. (2) Add a secondary swap file. See, for example: https://www.digitalocean.com/community/tutorials/how-to-add-swap-on-

Re: [Discuss-gnuradio] SEGFAULT when using GR_LOG_INFO

Does someone could help me to fix it? I really need to use this feature, and I don't know what I am doing wrong... Thanks -- Posted via http://www.ruby-forum.com/. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mail

[Discuss-gnuradio] GPS Signals recorded IQ samples file

Hi! After googling a lot and searching in this lists archive, I couldn't find any recording of IQ samples from GPS signals. I'm trying to record one myself, with no luck so far because (I suspect) of a malfunctioning active antenna. Would anybody with the right equipment be so kind to record som

Re: [Discuss-gnuradio] GPS Signals recorded IQ samples file

You may try this GPS signal simulator to generate IQ samples for testing. http://github.com/osqzss/gps-sdr-sim -- Wang Kang Blog: http://scateu.me Fingerprint: 011F 0492 97D6 5D75 8AC4 6458 D43F 3CE2 3353 B7BD On Wed, 19 Aug 2015, Francisco Albani wrote: Hi! After googling a lot and sear

Re: [Discuss-gnuradio] GPS Signals recorded IQ samples file

GPS data records and processing scripts for GNU/Octave are available at http://jmfriedt.free.fr/efts_archive.tar.gz. The tutorial I presented on this topic during the EFTS seminar is summarized at http://jmfriedt.free.fr/sdr_gps_eng.pdf JM > You may try this GPS signal simulator to generate IQ s

Re: [Discuss-gnuradio] GnuRadio: Clock Recovery MM: imu out of bounds

Hi Tom, Thanks for your help. I've adapted the sample rate of the result coming out of the low-pass filter now. However, if I decimate much further, my signal becomes a bit too weak I think. New chart: http://imgur.com/mbt288s,etHbYLT#0 New result: http://imgur.com/mbt288s,etHbYLT#1 Is this a