Hi,
Following a recent discussion on this list about complex signals,
I started writing a tutorial on IQ and complex signals for the
GNURadio wiki (not yet on the wiki) and have 2 questions:
References:
I've seen there is no references enabled h
Hi
I'm also interested in having multiple version on my linux distribution
and will soon try it.
about "The issue is that different versions just change so many things
and you get all kinds of nasty issues..."
I recently experienced such nasty issues while uninstalling GR3.9 and
installing
Hi
QPSK
GNURadio tutorial which was recently updated is a good
start.
On 22/01/2021 13:38, james jordan
wrote:
Hi
All,
i
want to implement psk transceiver in C.
Hi
Two months ago we had long discussions about why GNURadio was
using complex signal, and what really is such a signal.
We talked about 'spinning dancer' 'sampling the data twice', and
using "dogs as local oscillators". It was obvious that we need
Hi
Thanks to Achilleas for his kind advices.
In fact my personal notation (issued for my lecture to master
students) is conflicting with some other notation found in the
literature (may be my books are outdated, I've been teaching this
for 35 years!)
Not used to the waterfall QT GUI but it would have properties
derived from FFT:
total span is equal to sampling_rate
"resolution" is equal to df=sampling_rate/FFT size (one
frequency point at each df)
not to be confused with : resolution bandwi
Oups
I've seen your flowgraph
Sawtooth generator frequency can not exceed sampling_rate/2, but
it's set to 1 THz !!! Should be 100kHz (for 10 µs)
The waterfall can not be used to obtain the measurements you get
with a spectrum analyzer.
wit
Hi
when dealing with real hardware:
first is Hardware weel configured (antennas, gains)
then: is synchronysing required, generally yes, in the case of
GMSK I don't know (may be look at documentation if it need some
differential c
Hi
If I clearly understand, your data (herck_src.txt) is following
this path:
BPSK Modulation,[ NBFM mod, NBFM Demod], BPSK Demod
It seems your BPSK Symbol rate is SR=16 KBauds, so your BPSK
spectrum (*) is 16000(1+excesswb)=SR(1+excesswb) close to 20 Khz.
Please ,as I asked you, add a spectrum analyzer on the receive
path to at least observe if some signal is there or not!
If there is no signal (As I observe from my LimeSDR-Mini there
is one problem: which one ?
Question to other: Is
Hi
I recently fix a 3.8 issue and investigate a similar issue #3371
I clearly understand the origin of the bug as explained
here and proposed a method to fix the issue (reordering
blocks without GUI Hint so that are processed after all others
when compui
Hi
First we must know in which frequency band your operator is
implementing 2G 3G 4G
In my case (France) Operator are almost allowed to operated
approximately any generation in any frequency band.
Second you must know which G is used when making
564 is an ARFCN
see https://en.wikipedia.org/wiki/Absolute_radio-frequency_channel_number
to calculate Downlink (Mobile ->network) frequency FDL
On 18/02/2021 17:26, John Byrne wrote:
Thanks for the input everyo
Hi
As a regular user of GNURadio, I sometime trying to improve the
code and made some PR. I came to these questions and observations
:
I think It would be a good practice to encourage those reporting
issues (and also posting email on this list) to cle
Hi
I would like for my students to install from PPA, gnuradio 3.9
under Ubuntu 18.04 (I prefer 3.9 which I could use for a longer
term, if not possible I will switch to 3.8)
I made this numerous times under Ubuntu 20.04 but get the
following issue for Ubun
On Mon, Feb 22, 2021 at 7:54
AM Christophe Seguinot <christophe.segui...@orange.fr>
wrote:
Hi
I would like for my students to install from PPA,
gnuradio 3.9 under Ubuntu 1
Hi
Some rapid answers inside the original email
Christophe
On 22/02/2021 19:48, John Byrne wrote:
As someone with not much radio knowledge, I'm trying to
understand IQ modulation. I have a few questions if anyone can
A GR 3.8/3.9 flowgraph to see it in action.
the Hilbert filter output is :
real part : input signal delayed
Imag part hilbert transform of input + the same delay
the spectrum show the SSB signal (they are some low peak which
can be neglecte
;d lose the Q
information right? That's why I thought the carrier would have
to be offset. But you're saying it doesn't. Have I completely
misunderstood how down-mixing works?
Sorry if these are silly questions.
I confirm this an issue for GR 3.8 and 3.9
I used:
3 original filters with taps defined in a Variable block, and
(transition is not taken into account at runtime)
one filter (the last one: self.br_filter) with taps defined as
firde
Looking at callbacks_all (inside top_block.py), no callback is
related to "xx filter taps blocks" (the RRC filter taps not
present in the original flowgraph is also buggy)
in Yaml /gr-filters/grc/variable_low_pass_filter_taps.block.yml i
don't see any callback
Hi
I'm facing a strange an erratic issue in the attached flowgraph
used in GR 3.8.2. This flowgraph is only used to demonstrate the
issue, it doesn't do anything!
The issue appears when I'm defining a fractional bandwith (fbw)
as "1/sps" instead of a
Hi Barry
In fact they should allow modifying transistion bandwith (with a QT
Range) or other filter parameter at runtime.
Using 3.8.2 or 3.9 installed from PPA (Ubuntu 20.04) It doesn't works.
Did you suceeded in modifying transition bandwith at runtime? For which
GNURadio version?
On 04/
I'm using 3.8.2 installed from PPA /Ubuntu 20.04 It runs at the
first try.
my libgnuradio-runtime.so.3.8.2 is here (found with locate
libgnuradio-runtime.so.3.8.2):
/usr/lib/x86_64-linux-gnu/libgnuradio-runtime.so.3.8.2
/usr/lib/x86
Hi
- What does "negative Tx power" means ?
A few suggestions:
move to GNURadio >=3.8 (most of us uses GR 3.8 or 3.9 so
it's difficult to help for outdated GR 3.7)
QT GUI Sink : Bandwith should be equal to sample rate of the
The flowgraph I provided (Fri, 12 Mar 2021 19:00:33 +0100) works
with 4 sps (delay=58) and 8 sps (delay = 102)
On 15/03/2021 20:50, George Edwards
wrote:
Hi Mike,
Again, thanks for the great help and sorry to both
Hi Frédérique
About dummy.dat . The dummy.dat file (see file source in
tyour flowgraph) is a binary file which is not present in the
example folder containing a list of complex samples. You have to
find some recorded FM Signal to run the flowgraph.
Gnuradi
files to the folder from
which GNURadio-companion was launched. This is the home directory
if your run .grc file by double clicking them.
Regards, Christophe
On 18/03/2021 11:02, Christophe
Seguinot wrote:
Hi Frédérique
Hi all
There is something wrong in this simulation.
Attached is a flowgraph with a selectable Lime SDR Source, and a
RTL-SDR dongle as receiver. I tested this with a Lime SDR Mini.
I was suspecting a Lime SDR issue, however this is not so
freq?
On Thu, Mar 18, 2021 at
7:12 PM Christophe Seguinot <christophe.segui...@orange.fr>
wrote:
Hi all
There i
essor utilization (top with threads mode). The RR is
probably maxed out trying to upsample. There's a FIR at 12 MS/s
implied there.
On Thu, Mar 18, 2021 at 9:43
AM Christophe Seguinot <christophe.segui...@orange.fr>
Hi Clark
I'm running under Ubuntu 20.04 and GNURadio 3.9 fresh install (my
Computer and HDD were out for several days an I had to reinstall
Linux)
I downloaded maint-3.8 fm_tx.grc and fm_rx.grc. They worked at
the first run without any problem. (I only had
main()
File "fm_rx.py", line 486, in main
tb = top_block_cls()
File "fm_rx.py", line 252, in __init__
window.WIN_BLACKMAN_hARRIS, #wintype
AttributeError: type object 'gnuradio.fft.fft
window.__init_subclass__=
window.__init__=
I would have implement this differently:
First solution combine To filters taps in one filter such as
final_taps=rrc_taps*(pulse-1)+rect*pulse
with pulse =0 or 1 (obtainde with a QT GUI Chooser)
BUT filters must have the same numbe
It looks like the sink label/name is not rendered for the QT Sink.
On 12/04/2021 13:30, alberto.alle...@alice.it wrote:
Hi to all!
Today i have another question..
I have created a small spectrum analyzer and it work fine.
But, in the QT GUI SINK, at "Name" field i have writted "Test".bu
Hi
I didn't had time to look at this, so the following expectation may be
wrong.
The problem with qtgui sink is probably the same as for the eye_sink I
developed.
This QT sink have Mutliple figures, each figure having a title. This
title is set using set_title() method which is a method of
other bug, but can you confirm
that the grc flowgraph you sent me (with two selectors) worked
for you?
best
Achilleas
On Mon, Apr 12, 2021 at 4:41
PM Christophe Seguinot <christophe.segui...@o
Hi
comparing inp and out bits in x-PSK at least need differential
encoding/decoding,
See for example https://wiki.gnuradio.org/index.php/Guided_Tutorial_PSK_Demodulation
Regards,
On 19/04/2021 00:48, George Edwards
wrote:
This flowgraph is correctly build under GR 3.9.0.0 (no USRP source to
test further)
The error is quite strange, I think there is no "len_tag_name" parameter
in such a simple flowgraph
On 24/04/2021 16:35, Mike Markowski wrote:
I'm running gnuradio companion 3.8.1.0 (Python 3.8.6) on Ubuntu
2
rs if your GR 3.8.1.0 is or isn't running fine. Most likely,
it's my environment since I don't see a flurry of 'me too' notes.
Mike
On 4/24/21 12:16 PM, Christophe Seguinot wrote:
This flowgraph is correctly build under GR 3.9.0.0 (no USRP source
to test further)
Hi James
Your first signal (upper branch) is one of those I like to show
to my students to explain the Nyquist sampling theorem.
1- As Daniel said, sampling frequency Fs must be higher than
half the maximum frequency Fmax: This is the Nyquist Sampling
of course twice not half.
Thanks Jerry and sorry for writing to fast without correcting
these evidences!
On 26/04/2021 16:58, geraldfenkell
wrote:
is it not: The sampling frequency must be twice the max
f
Hi
I made a partial test:
removed the osmosdr source (I don't have installed gr-osmoSDR
at present) and replaced it with a dummy.dat file/file source
removed the missing block dvbtx_ofdm_sym_acquisition (my be
this is your OOT bloc
Look at your RTLSDR sample rate limitation
For example the RTL2832U
can sample from two ranges ... 225001 to 30 and 91
to 320.
On 13/05/2021 22:30, Rob Roschewsk
wrote:
Hi all!
Dear all
I working under ubuntu 18.04 and GNURadio 3.7.11 and attempt to define a
QTGUI eye_sink block to display eye pattern under gnuradio-companion.
Without any knowledge of the best method to achieve this, I decided to:
1- define a new OOT module using gr_modtool
gr_modtool newmod csqt
with us (gist.github.com
or fpaste.org
or so)
Best regards,
Marcus
¹ that can be done via
sudo add-apt-repository ppa:gnuradio/gnuradio-releases
sudo apt-get update
On Fri, 2019-11-08 at 14:38 +0100
Hi Kristoff
I already tried this in the past but did not saved the
corresponding grc file. I remember thath I did not succeed in
getting a non rotating constellation for the RDS signal which
normally is achieved when using your method. I also tried to
de
Hi
Your amplitude is set in constellation object, in the
constellation points list.
At present yours is +-1 for BPSK, and +-1+-j for QPSK
So amplitude is 1 (+-1) for BPSK and 1.414 for QPSK
This must be adjusted to your requirements (-0.5,0.5) for
Hi
I'm finalizing an in tree QTGUI eye_sink block. I use a GRC
example which was working fine until I decided to upgrade my local
GNURadiorepro (GnuRadio and Volk upgraded to latest commit on
January 5 2020, I was previously using 3.9 master uploaded in
I was able to solve this was using a
PYTHONPATH environment variable (export
PYTHONPATH='/usr/local/lib/python3/dist-packages')
Regards, Christophe
On 06/01/2020 22:50, Christophe
Seguinot wrote:
Hi
I'm f
Hi
I developed a QTGUI eye sink block for GRC and hope it will be
interesting for the community. I will soon submit it as a pull
request. The code was tested on the latest master branch (gnuradio
3.9) but it may be easily merge in 3.8 (I did 't tested it on
Hi
When using GNURadio Companion 3.9, one can define color in
different sinks such as the time sink.
these color are not taken into account
the .py generated code variable colors only account for
default colors (colors = ['blue', 'red', 'gre
Hi
I was interested in using LimeSDR mini under GNURadio 3.8 / Ubuntu 18.04.
At present, I didn't succeeded in making it work using the gr-limesdr
3.8 branch https://github.com/myriadrf/gr-limesdr/tree/gr-3.8 (compiling
this 3.8 branch worked). My .grc example do not generate the .py file
and
ll try compiling and using gr-osmosdr under GR3.8
Regards
On 27/01/2020 15:15, Christophe
Seguinot wrote:
Hi
I was interested in using LimeSDR mini under
GNURadio 3.8 / Ubuntu 18.04.
At present, I didn'
, but it now works!
Regards
On 28/01/2020 09:45, Andrew Back wrote:
On 27/01/2020 21:37, Christophe Seguinot wrote:
Do not account for my previous mail. I switched from 3.9 to 3.8, builded
from source because I'm testing and developing code, but some older
gnuradio python code where in/usr
Hi
I spent a lot of time before succeeding in connecting my RTL-SDR dongle
and my LimeSDR Mini under gnuradio 3.8. This has generated some mails on
this list. It's worst saying that the information is spreaded and not
easy to find.
At present, most packages are compatible with GNURadio 3.7,
noise. In that case, the spectrum
do not exhibit a maximum at the radio station frequency.
Did you set the LimeSDR Gain to a large value (up tu 70 dB for
the LimeSDR Mini)
On 29/01/2020 23:41, jane wrote:
hi, Christophe Seguinot
Hi
Here are the steps I used to get a working LimeSDR under GNURadio
3.8 installed from PPA (Ubuntu 18.04). Since hardware SDR
tools are rapidly evolving this procedure may be outdated soon!)
Lime SDR needs
Lime Suite which can be obtaine
If that can help those interested in GQRX under GNURadio 3.8
(this worked for me under an Ubuntu 1.04 fresh install):
installs from source gr3.8 branch of
git.osmocom.org/gr-osmosdr (not yet available as debian package)
install some GQRX dependancies
Hi
find the number of CPUs in your system with command:
cat /proc/cpuinfo | grep processor | wc -l
don't use all available CPU when using make -j (example make -j3 if you
have 4 CPUs)
Regards, Christophe
On 05/02/2020 14:38, Glen Langston wrote:
Hi Sarandis,
In the first version of
Hi
I'm stucked on a trivial interpolation problem.
I was trying to interpolate a binary source ( in the attached
flowgraph I've witched to a rectangular wave source to analyse and
explain my problem).
So I've a rectangular source with 4 sa
giving
1 1 1 / 1 1 1 / 1 1 1 / 1 1 1 / -1 -1 -1/ -1 -1 -1/ -1 -1 -1/
On 23/03/2020 17:46, Christophe
Seguinot wrote:
Hi
I'm stucked on a trivial interpolation problem.
I was trying to interpolate a binary source ( i
Great I was searching for this feature.
Nevertheless, they are some things I don't understand in the
interpolation bloc!!
On 23/03/2020 18:32, Brian Padalino
wrote:
On Mon, Mar 23, 2020 at 1:26 PM Chris
Hi
Possible mistake:
verify the antenna is connected to the selected Rx port
verify the antenna really have some gain in this low frequecy
range (I had this issue with low cost 900 and 1800 Mhz anennas
which are less efficent than a 20 cm
Dear all
I'm using GNURadio for my distance learning class an intend to
demonstrate demodulating ASK with ADS-B signal. At present, they are
only 3 planes 80 km away from my home. I was not able to find any
recorded ADS-B signal on the internet.
Could someone provide me with a ADS-B signal t
Hi
It crashes with a Segmentation fault (core dumped)
Ubuntu 18.04
GNURadio 3.8.1
On 28/04/2020 07:07, Gilad Beeri
(ApolloShield) wrote:
Hi,
Can someone
with GNU Radio 3.8.1 and
Can you please provide the .grc or .py file for local testing ?
On 02/05/2020 19:32, Michael Hartje wrote:
Dear List,
after upgrade to GR 3.8 (opensuse Thumbleweed) I tried the first simple
receiver:
RTL-SDR-Block ---> null-Block (checked it with osmosdr-block, -- same error)
When I start the
Hi
I recently submitted an "add eye_sink" PR. (as I'm not familiar
with PR, I made several attempts/close : correct coding standard
and new line at EOF)
I'm sucked on a request
to use the following format for short function
fun
Hi
Without any knowledge about the signal (which standard is used? ) nor
about your flowgraph, anyone can answer your question!
On 12/05/2020 07:38, Hamid Rahatloo wrote:
HI
I'm using a USRP to receive a signal on the 900 MHz frequency band,
but the signal received after demodulation has no
Hi
I recently switched my computer to Ubuntu 20.04 and installed
GNURadio 3.8.2.0 from ppa
(http://ppa.launchpad.net/gnuradio/gnuradio-releases/ubuntu).
Version 3.8.2 is the latest in this PPA and is installed by default.
I also installed gr-osmosdr gr-limes
Boven.
On 8/27/20 12:25 PM, Christophe Seguinot wrote:
Hi
I recently switched my computer to Ubuntu 20.04 and installed
GNURadio 3.8.2.0 from ppa
(http://ppa.launchpad.net/gnuradio/gnuradio-releases/ubuntu).
Version 3.8
Hi
One of my flowgraph was generating the error:
self.audio_sink_0 = audio.sink(audio_rate, '', True)
AttributeError: 'int' object has no attribute 'sink'
This error was not easy to debug since the error message sounds like
there was a library error (which was not the case here).
My
Hi
I experienced a similar issue when using gr-osmosdr and
gr-limesdr too so my experience could help for this problem (I did
not use Adalm-Pluto)
I installed gnuradio 3.8.1 (bad idea since Synaptic always ask to
update to 3.8.2) OR 3.8.2 from
h
Hi Tom
Can you check that /usr/lib/x86_64-linux-gnu only contains
libgnuradio 3.8.2 (and no 3.8.1 nor 3.8.0) libraires using ll
/usr/lib/x86_64-linux-gnu/libgnuradio* ?
I have been in such a trouble which breaks gnuradio-companion
(Ubuntu 20.04)
Hi
-0.3 correspond to 0.5=10^-0.3 error rate which is the maximum
error rate obtained when demodulation is completely wrong.
You must use a delay in your input bytes (between throttle and
BER block) so that receives bytes are synchronized wi
Hi,
I did this in september , see the pdf attached to this email on the
discuss gnuradio list
https://lists.gnu.org/archive/html/discuss-gnuradio/2020-09/msg00123.html
regards,
On 20/10/2020 23:52, gokul sani wrote:
Dear Sir/Madam,
I am kind of new to Gnuradio, i am craving to start with
Hi
Which version of GR are you using?
If using 3.8.x see here :https://lists.gnu.org/archive/html/discuss-gnuradio/2020-09/msg00123.html
Sincerely, Christophe
On 01/11/2020 15:43, gilles rubin
wrote:
Hi
You must install gr-osmosdr to use SDR dongle ( I don't use Blade
RF and don't know if there are other gr tools for Blade RF
source/sink )
at the end of september, for Linux distribution (Ubuntu 20.04 in
my case):
gr-osmosdr is not compatible
t version.in
that case should I delete and build the GRC from the
beginning from source? please guide me.
On Wed, 4 Nov 2020, 6:58
pm Christophe Seguinot, <christophe.segui..
Hi
I do agree with Jeff Long.
You will have to distinguish Sampling and IQ:
Complex signal are not related to sampling, even if sampled
signals in GR are generally complex
Complex signal come from the baseband equivalent
Sorry the link was wrong see https://lists.gnu.org/archive/html/discuss-gnuradio/2020-09/msg00123.html
On 04/11/2020 14:22, Christophe
Seguinot wrote:
Hi
Yes this is correct ( was correct in september 2020). You must
first
Hi
I've been investigating but did not yet found the origin of this
problem. I'm working under GR 3.9/Ubuntu 20.04
the bit sequence is correctly demodulated, whatever the source
(txt or random) is. There is a 58 sample delay between bit
sou
Best Regards,
Maitry Raval,
R& D engineer|Azista Industries Pvt Ltd|
079-40605800|www.azistaaerospace.com
From: "Christophe
Seguinot"
To: "Maitry Raval"
Hi
If you intend to use SDR Dongle see here. Its for Ubuntu 20.04
but should probably work for 20.10.
https://lists.gnu.org/archive/html/discuss-gnuradio/2020-09/msg00123.html
On 14/11/2020 05:52, Alex Humberstone
wrote:
Hi
About Osmocom-sink
It seems that you have gr-osmosdr installed since your
flowgraph has one osmocom-source.
What you need is an osmocom-sink and if you have
osmocom-source you must also have osmocom-sink too!!
so What is
Hi
Always post command results as a txt file, not as pictures
It seems that qt-gui is not installed (no answer to second
command (you should have got answer "qt-gui")
May be some dependencies (qt4, qwt, pyqt) are not satisfied look
here
https://www.gn
Hi
I'm too using Ubuntu.
All recent version from 18.04 to latest 20.10 will give you
equivalent experiences.
However, if you intend to build from source (compile source),
you will have to do it sometime, prefer 20.04 or 20.10 (I th
Hi Volker
Did you succeeded in porting gr-osmosdr to GR3.9 ? Do you have some
repository for this ?
Regards, Christophe
On 14/09/2020 17:10, Volker Schroer wrote:
Hi Chris,
I started gr-osmosdr some month ago, but I had to interrupt due to other
coding needs.
What gr-osmosdr repository di
Hi
I facing a simple issue on my Ubuntu 20.04 gnuradio 3.8.2.0
install on one of my partition
I installed from ppa:gnuradio/gnuradio-releases on two different
partition, both having Ubuntu 20.04 and the same PPA gnuradio
version. Let's call these inst
I found this closed
issue on gnruradio github. with a solution which solved my
issue.
Meanwhile I don't understand why I got this erroneous
/usr/share/gnuradio/grc/blocks/qtgui_range.block.yml file !
On 16/12/2020 14:35, Chris
After further investigation I came to the conclusion that my GRC
(version 3.8.2.0) load 3.9 blocks. In my flowgraph, QT GUI
frequency sink has a 'Normalized window power' parameter which has
been introduced in GR 3.9.
This leads to the error :
File "
Got it !
I had to remove ~/.cache/grc_gnuradio/cache.json
Regards, Christophe
On 16/12/2020 18:50, Christophe
Seguinot wrote:
After further investigation I came to the conclusion that my
GRC (version 3.8.2.0) load 3.9 blocks
Hi
Without a flowgraph anyone can help.
The first thing I would check : verify the sampling rate used in each
block. When using several sampling rate, when one is uncorrectly set it
can stop your simulation and freeze time or frequency sink.
Sincerely, Christophe
On 21/12/2020 11:50, Ali G
Hi
Thank you for sharing this interesting educational documents and video.
Regards, Christophe
On 09/01/2021 22:48, jean-michel.fri...@femto-st.fr wrote:
Dear GNU Radio community,
due to lockdown restricted access of students to universities, I have recorded
videos for the undergraduate course
Tried source -> log power fft -> max -> QT GUI number
sink :
It works
On 15/01/2021 14:29, Jeff Long wrote:
Try deleting the block, saving, and adding the
block back in. I tried
source -> log power fft -> max .
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