Hi Richard,
I'll pitch `perf` here (you're on Ubuntu, so it's in the linux-tools,
probably).
Build GNU Radio with the debugging symbols enabled, i.e. call CMake with
the build type specified:
cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo ..
Then, allow normal users to sniff around processes' calls:
s
Hey GNU Radio community!
Thanks for choosing my project for this year's ESA Summer of Code in
Space. I will implement a POLAR code encoder decoder chain as well as
channel construction.
I would like to introduce myself a bit today.
I am a Master degree student at Karlsruhe Institute of Technology
Hi all guys,
I encounter following error when running my test:
ImportError: /usr/local/lib/libgnuradio-TPMS.so: undefined symbol:
_ZN2gr6blocks14file_sink_baseC2EPKcb
There was a similar problem explained here:
http://stackoverflow.com/questions/28859517/gnuradio-importerror-undefined-symbol
I
On 27.05.2015 18:30, Marcus D. Leech wrote:
> On 05/27/2015 05:52 PM, Carl Olsson wrote:
>> Hi all,
>>
>> I use a file sink block in my flow graph to record samples from a USRP
>> N210. I start the flow graph and then after some time starts to record
>> using the file sink block by switching it on
Hi John,
> I have a complex phase rotation function that uses a pre-generated sin/cos
> LUT and some basic multiple/adds.
>
> As it turns out, the rotation calc, which uses "straight" C/C++ math is
> still the bottleneck in a demod.
I don't quite get what you need ...
Rotating a single sample b
Hello again,
I tried to add a C++ noblock to my OOT module. In this particular case I
wanted to provide a reusable "n of m" counter class (for non-signal stuff
to count) in C++ code that I could use within various C++ blocks in the
module. And I did not know of a better way to manage that with the
On Thu, May 28, 2015 at 8:26 AM, John Murphy <
mr.john.joseph.mur...@gmail.com> wrote:
> Anyhow, it unexpectedly generated an xml file to import the non-block into
> GRC.
> Is there a best way to just remove that xml file without causing other
> issues?
>
First, do a 'make uninstall' from your b
Okay.
Tried this, then deleted the xml file before attempting to make again
without it.
Got the following error when re-making (the line with the xml file had a
destination which I had thought was just for that file)
What do I need to do to fix this?
Thanks,
- John
CMake Error at grc/CMakeLists.t
On Thu, May 28, 2015 at 9:17 AM, John Murphy <
mr.john.joseph.mur...@gmail.com> wrote:
> Tried this, then deleted the xml file before attempting to make again
> without it.
> Got the following error when re-making (the line with the xml file had a
> destination which I had thought was just for th
Nevermind, figured out (by looking at another module, fortunately had one
handy although one could probably find such on git somewhere now that I
think about it instead of hitting the panic button)
for posterity, you just have to add the following to the end of the line
listing the last xml file
D
On Thu, May 28, 2015 at 12:05 AM, Marcus Müller
wrote:
> I'll pitch `perf` here (you're on Ubuntu, so it's in the linux-tools,
> probably).
>
I'm pretty sure the issue is as Murray Thomson described above. We've had
to optimize this area in the past in GRC.
--
Johnathan Corgan
Corgan Labs -
I have a question concerning connecting two DVB-T dongles on the same clock
source for interferometric (or passive radar) measurements, as described at
http://kaira.sgo.fi/2013/09/16-dual-channel-coherent-digital.html
I have assembled the same system with one dongle used as oscillator on a 28.8
MH
This is largely because this $10.00-apiece hardware was never designed
for this class of application. When you're doings things that require
phase-coherence, you have to design your radios to support it.
There are at least two PLLs involved here--one on the R820T chip, and
another, as far as I
Thanks for your reply. Indeed designing phase coherent receivers is my daily
job activity (partly), but the fun of hacking DVB-T receivers is to find ways
of using
these for applications they were never intended for. I have indeed read your
posts
concerning the difficulties in reproducing inter
On Tue, May 26, 2015 at 7:37 PM, John Malsbury wrote:
> I have a complex phase rotation function that uses a pre-generated
> sin/cos LUT and some basic multiple/adds.
>
> As it turns out, the rotation calc, which uses "straight" C/C++ math is
> still the bottleneck in a demod.
>
> I was wonderin
On Thu, May 28, 2015 at 1:52 PM, Douglas Geiger
wrote:
> To follow-up on Sylvain's questions: is the restriction really on doing
> single-sample rotation (because of some intermediate calculation to generate
> the phase advance for the next sample), or on the alignment?
Based on available inform
Hi,
I guess I should respond, as I'm responsible for the blog posting that you
linked.
I tested the relative phase stability using amplified noise that was fed
via a splitter onto the two dongles. I cross-correlated the noise and found
that there was a deterministic frequency difference between t
Dear List,
please note that the programme of the SDRA-2015 is now complete.
http://www.sdra-2015.de/pages/programme.html
We have also finalized the timetable now.
I'll be happy to welcome many of you at Friedrichshafen! The SDRA will
take place on June 27.
vy73
markus
dl8rds
_
It really does need to happen on one sample at a time - at least assuming I
use the same algorithm I'm using now. I am pretty much using the method
Sylvain suggests. The rotation is one operation of many inside a block -
ie. many rotations happen per call to work(), but one rotation per input
sam
I'm installing gnuradio again on my ubuntu 14.04 installed in VMware
11.1.0. I tried it several times, but I can't seem to pass this step:
Fetching various packages (Gnu Radio, UHD, gr-osmosdr, gr-iqbal, etc)
via the Internet
===> THIS MAY TAKE QUITE SOME TIME <=
Fetching Gnu Radio via
On 05/28/2015 07:31 PM, Gerome Jan L wrote:
I'm installing gnuradio again on my ubuntu 14.04 installed in VMware
11.1.0. I tried it several times, but I can't seem to pass this step:
Fetching various packages (Gnu Radio, UHD, gr-osmosdr, gr-iqbal, etc)
via the Internet
===> THIS MAY TAKE QU
The fixes to Ubuntu installed IPV6 which basically kills the network opens.
Disable it and reboot.
73,
Alan - W6ARH
From: discuss-gnuradio-bounces+alan.r.hill=gmail@gnu.org
[mailto:discuss-gnuradio-bounces+alan.r.hill=gmail@gnu.org] On Behalf Of
Gerome Jan L
Sent: Thursday, May
What do you mean IPv6? I'm using IPv4. Sorry, but I don't quiet get your
suggestion. Please elaborate. Thanks.
*Gerome Jan M. Llames *
Engineering Research and Development for Technology (ERDT) Scholar
University of San Carlos - Technological Campus
Nasipit Talamban, Cebu City, Philippines, 6000
M
Check the internet for suggestions on how to cure slow internet connections in
Ubuntu. You do not have to be using it to have it active.
Alan
From: Gerome Jan L [mailto:geromejanlla...@gmail.com]
Sent: Thursday, May 28, 2015 5:10 PM
To: Silverfox
Cc: discuss-gnuradio@gnu.org
Subject: Re:
Hello,
I am trying to make a simple spectral survey with a USRP and GRC. I want to
create a flowgraph that runs for a fixed number of iterations. In each
iteration, I need to set a new center frequency in the uhd source, read data
from the uhd source, run fft on it, and write results to a file
>>Or is there a way to make sure that the in-buffer gets updated multiple
times within the same work call?
Will placing the work function inside a while 1 do the trick? But I guess
the issue with that is, as long as data is available, the scheduler calls
work function again and again anyway.
I'm
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