Hi,
I am working on the channel model block in GNU radio. I am confused in
setting up the taps.I have a random source that undergoes a QPSK modulation
at 4 samples per second.Could you please explain me the concept under
setting the tap values.
I am supposed to use a polyphase clock synchronizer
Hi,
I am working on the channel model block in GNU radio. I am confused in
setting up the taps.I have a random source that undergoes a QPSK modulation
at 4 samples per second.Could you please explain me the concept under
setting the tap values.
I am supposed to use a polyphase clock synchronizer
Hi Muller and Tom,
I used pybombs approach to solve the problem. After the cloning process, it
gives the following error.
Configuration failed. Re-trying with higher verbosity.
make: *** No targets specified and no makefile found. Stop.
Could you see a resolution here?
Zamrath
On Wed, Mar 18,
Philip,
Thank you for letting me using your images. I tried both of them with the *dd
*command, it took me around 2000 seconds (30 mins) each and after using
them on the board I get the following message via the UART:
*U-Boot SPL 2014.01 (Jan 09 2015 - 20:24:45)*
*mmc boot*
*reading fpga.bin*
*sp
Hi everyone,
I have built a tx and a rx grc flowchart for OFDM using USRP. I found the
range of the amplitude of the input is fairly small in order to get it
working (i.e., the USRP at the rx end can successfully decode the packets.)
I wound if anyone can share some thoughts about this? I've been
Hello,
I'm using QT with 3 tabs. The first two tabs have only 4 plots on each of
them that fit nicely into the window. On the third tab, I have a lot of
plots that I place all in one column.
The third tab effects the layout size of all the other tabs, making it all
look horrible and difficult to
Martin,
Bingo! That worked.
Can you put those two numbers, 4 and 8 into words. I'm still having a heck
of a time understanding what is going on with this block.
v/r,
Rich
On Wed, Mar 18, 2015 at 9:54 AM, Martin Braun
wrote:
> On 17.03.2015 14:46, Richard Bell wrote:
>
>> Each byte going into
Greetings,
I have been trying to install & run gnuradio for a couple of weeks now. No
matter what I do I get a segmentation fault. eventually did a fresh install of
ubuntu 14.04.2 & got the build-gnuradio script; installed & ran; segfault.
dmesg >
gnuradio-compan[537]: segfault at 27eb6 ip 00
i should also add that the output of "./pyboms" list shows that gr-fosphor
IS installed, output below:
Loading recipes ...
Printing recipe status list:
{'pseudo': ['all'], 'common': ['airprobe', 'airspy', 'bladeRF', 'fecapi',
'glfw3', 'gnss-sdr', 'gnuradio', 'gqrx', 'gqrx-digital', 'gr-air-modes'
sorry for the late reply, was away from this lab. no that directory dose
not exist
thanks,
-b
On Wed, Mar 4, 2015 at 2:44 AM, Sylvain Munaut <246...@gmail.com> wrote:
> Hi,
>
>
> > ImportError: cannot import name fosphor
>
> Does /home/cnlsdr1/pybombs/lib/python2.7/dist-packages/gnuradio/fosphor
Hi all,
In GNURadio we had ControlPort capability which is now disabled based on
some (unknown to me) reasons. ControlPort gave us a sort of control over
flowgraph such as setting or getting different parameters from different
blocks.
So I have seriously a problem with accessing a parameter withi
M. Leech, I had set up the transport settings, but thanks for clarifying what
actually causes the D, that was an important point for me to understand.
M. Muller, I haven't used the perf tool but that's exactly the kind of thing I
was looking for. I'll take a look.
Thanks gentlemen!
-Doug
_
On 17.03.2015 14:46, Richard Bell wrote:
Each byte going into the HPD is an unpacked byte. There is only 1 bit
represented per byte. Receiving the full payload of 1024 bits requires
1024 bytes of input. What does this imply for the HPD parameters?
By setting it up with
header_length = 1 (symbol)
Hello,
Well, I installed the gr-ldpc module using pybombs in Gnuradio v3.7.6.1, and it
no error occurred during the installation. I opened the Gnuradio and searched
the module in the module list, and it was there, but when I tried to add the
block: ldpc_encoder_bb to my project, the entire proje
Ah! Thanks, Tom, that works.
> In the meantime, you can cast it yourself when you use it. Say your Range
> block variable is "var", when you pass it to a block, say "int(var)" to cast
> it to an integer.
> Just remember that all of the edit boxes for parameters in GRC are Python,
> so you can put
On Wed, Mar 18, 2015 at 11:58 AM, Murphy, John
wrote:
> I have a GRC flowgraph that includes a custom C++ block which dumps
> custom vectors out a port, so I use the QT GUI Vector Sink to display
> these.
> The block also requires integer params which I need to adjust while
> the flowgraph is run
I have a GRC flowgraph that includes a custom C++ block which dumps
custom vectors out a port, so I use the QT GUI Vector Sink to display
these.
The block also requires integer params which I need to adjust while
the flowgraph is running.
I have a problem, because as near as I can tell...
a) QT GU
Well I actually discovered that the Python OpenGL bindings were non functional
for some reason, so my solution was just to install the python-opengl package,
and now it works perfectly. Thanks a lot for pointing me at the right direction
once again Marcus!
Best regards,
Nikos
Hi Alejandro,
are you sure you want to use the FFT sinks?
They basically "just" internally put the sample stream into vectors of
fftlen length, then calculate the dB(abs(fft(these vectors))), and
display the result.
What you're describing sounds more like you'd want to use the
standalone, not-grap
Hello GNUR's!
I am a newbie in this community so I may pose a very simple question...
I am trying to split via GUI the output vector of the FFT block in two halves,
one with the upper part and one with the lower part -i.e. I don't want a
duplicate of the output vector-. Say I have a FFT of 1024
Can you not try the QT sinks?
If you want to stick with wxgui,
You can try the old trick of disabling OpenGL. Make and edit
~/.gnuradio/config.conf and add the lines:
[wxgui]
style = nongl
Method courtesy of Tom,
http://lists.gnu.org/archive/html//discuss-gnuradio/2013-07/msg00426.html.
Greeting
Well I made some tests and I can verify that there seems to be nothing wrong
with OpenGL in my VM, so I don't have a clue why I can't see any results.
From: discuss-gnuradio-bounces+n.bizanis=student.tudelft...@gnu.org
[discuss-gnuradio-bounces+n.bizanis=student.
Hm, then the empty window usually indicates there's not enough samples
that have reached your graphical sink at all, *or* there's something odd
with OpenGL in your VM.
On 03/18/2015 02:41 PM, NIKOS BIZANIS wrote:
> No I am running it in my machine, using a VM in VMWare player.
>
> Greetings,
> Ni
On Wed, Mar 18, 2015 at 1:46 AM, Vijay Galbaransingh wrote:
> Tom,
>
> What kind of sample rate / setup are you using for your opensl_source? I've
> set up a flowgraph that is just an opensl_source (sampling at 48kHz)
> connected to a file sink, and when I play back the file through GRC on my
> d
On Wed, Mar 18, 2015 at 9:29 AM, Marcus Müller
wrote:
> Pybombs can't solve a lack of RAM -- it just offers an automated build
> procedure.
> Search google to find information how to add swap to your system. However,
> swap is just RAM that is temporarily exiled to permanent storage. Now, a
> mi
No I am running it in my machine, using a VM in VMWare player.
Greetings,
Nikos
From: discuss-gnuradio-bounces+n.bizanis=student.tudelft...@gnu.org
[discuss-gnuradio-bounces+n.bizanis=student.tudelft...@gnu.org] on behalf of
NIKOS BIZANIS [n.biza...@student.tud
Yes, that was the reason I was getting the run-time error. I did set the build
options to WX GUI in the options block (it was set to QT GUI) previously, and
now it runs. The problem is that when the window opens I can't see any FFT
plot, it is just a blank window, and I get the message:
Warning
It seems you solved the issue yourself.
Hm, that is strange. You're not running this via SSH or something of the
like?
Greetings,
Marcus
On 03/18/2015 02:28 PM, NIKOS BIZANIS wrote:
> As an update, I realized that in the "Options" block, "Generate
> Options" was not set to WX GUI so i set it. No
Pybombs can't solve a lack of RAM -- it just offers an automated build
procedure.
Search google to find information how to add swap to your system.
However, swap is just RAM that is temporarily exiled to permanent
storage. Now, a microSD card is several orders of magnitude slower than
RAM, so whils
That is a good sign! This looks like you're using WX widgets, but you
haven't set the build options to WX GUI (could be "No GUI" or "QT GUI")
in the options block in your GRC flow graph.
Greetings,
Marcus
On 03/18/2015 01:25 PM, NIKOS BIZANIS wrote:
> After running ldconfig I still get an error,
As an update, I realized that in the "Options" block, "Generate Options" was
not set to WX GUI so i set it. Now the WX GUI FFT Sink opens the Top Block, but
nothing is displayed there, I can't see any plot and it quickly fails. The only
error message that I get is:
Warning: failed to XInitThre
Yes, RAM seems to be not up for the compiler's asking rate. I used 'watch'
command to observe it. At peak, free memory drops down to zero.
BTW, I am interesting to know how to extend RAM in Bananapi (capacity of
Micro SD card is 16 GB), in case pyBOMBS method does not give me a hand.
Thanks,
Best,
On 03/18/2015 12:15 AM, nur qalbi wrote:
I already do it ./build-gnuradio -v uhd_build. What can I do?
Is
/usr/local/bin/uhd_find_devices
Actually there?
On 18 Mar, 2015 11:56 AM, "Marcus D. Leech via USRP-users"
mailto:usrp-us...@lists.ettus.com>> wrote:
On 03/17/2015 11:51 PM, nur
After running ldconfig I still get an error, but a somewhat different one:
Warning: failed to XInitThreads()
Traceback (most recent call last):
File "/home/nikos/top_block.py", line 105, in
tb = top_block()
File "/home/nikos/top_block.py", line 56, in __init__
self.GetWin(),
File "/
If it hangs, that just sounds like the poor ARM is busy; compiling is
hard! You can check your CPU usage by running "top" in another console.
If building aborts, you might need to add some swap space, to "extend"
your RAM (start with 4GB). That will be horribly, horribly slow.
Greetings,
Marcus
O
Hi Müller,
Thank you for the detailed answer you provided. I will surely try one of
the method you have given above. Meantime, the reason why I went for the
debian GNURadio was, when GNURadio is built, it halts at around 50%. It has
been run for 15-20 times. As you have pointed out, it was due to
Ah well, in that case: it seems like you've successfully installed the
block definition XML files to a place GRC can find them, but that does
not apply to the library you're missing now. If "sudo ldconfig" doesn't
help, make sure that
make install
inside your gnuradio/build directory actually is s
Hi Marcus,
What I meant by "able to use", was that I was able to find the blocks using the
search facility and put the block to a flowgraph. I had not actually tried to
build and execute a flowgraph containing any of these blocks, and now that I
tried this was the result.
Greetings,
Nikos
___
Hi Nikos,
you said earlier you were able to use WX widgets. Did you do something
in between that and your system now not being able to find the
libgnuradio-wxgui library?
Greetings,
Marcus
On 03/18/2015 12:34 PM, NIKOS BIZANIS wrote:
> Hey all,
>
> Just to start experimenting with GNU Radio and
Hey all,
Just to start experimenting with GNU Radio and companion I just created a
simple flowgraph consisting of a Signal Source Block and a WX GUI FFT Sink
connected to it, to see if the diagram will be generated. I get a run-time
error, namely:
Executing: "/home/nikos/top_block.py"
Traceba
Hi Zamrath,
now you're mixing different versions of the same library (UHD).
The debian GNU Radio was built and linked against the debian UHD, but
now you're using the Ettus UHD package, so the symbols that the debian
GNU Radio thought it knew are now unavailable.
You should uninstall debian's UHD
Hi all,
I have recently installed UHD and GNURadio on Bananapi (armhf) board adding
"deb http://ftp.de.debian.org/debian jessie main" in
"/etc/apt/sources.list".
Downloaded GNURadio from "
https://packages.debian.org/jessie/armhf/gnuradio/download";
dpkg -i gnuradio_3.7.5-5_armhf.deb
apt-get upd
Hi Doug,
I've personally grown fond of the perf tool that should be available for
about any reasonable linux distro out there [1]; it's usage would be
something like
sudo sysctl kernel/perf_event_paranoid=-1 ### note: I'm telling you to
allow any user to introspect process behaviour.
perf recor
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