Hi everyone,
i'am trying to do simply QAM modulation for that the source i used
is vector source which gives 1byte of 1's and 0's which is fed to QAM
modulator .
Can anyone tell me how do i calculate samples/symbol .I know the
traditional formula
Hi,
I recently installed some stuff on my Opensuse 12.3, including gnuradio
and QGis2.
When using QT widgets, Gnuradio GRC fails with
Traceback (most recent call last):
File /home/sgofferj/top_block.py, line 12, in module
from gnuradio import qtgui
File
Marcus,
I think wayne is referring to the gnuradio scheduler presentation of Tom
Rondeau in his blog. The link is
http://gnuradio.squarespace.com/blog/2013/9/15/explaining-the-gnu-radio-scheduler.html
On Tue, Dec 3, 2013 at 12:44 PM, Marcus Müller mar...@hostalia.de wrote:
-BEGIN PGP
Hi,
Bits/symbol depends on modulation scheme that you use to transmit. For
BPSK, it is 1 bit/symbol, for QPSK it is 2 bit/symbol and for 64-QAM it is
6 bits/symbol. So you can set it according to modulation scheme you use.
Samples/symbol is normally default set to 2. I am not aware in
Hi karan ,
Thanks for reply .
well ya in gnuradio also if i set the value of samples/symbol below 2 it is
throwing me an error .
So is there any specific reason behind using the value greater than 2?
and is that higher the value of samples/second the smoother will be the
waveform? please
Just a follow up.
I have noticed that data demodulation is intermittent, like if I execute the
same flowgraph a number of times sometimes I get a waveform after
demodulation but most of the time received scope is blank.
I really have no explanation for this.
Any information regarding this would
Hi Sandhya,
You need atleast 2 samples/symbol for demodulation.
Normally when there are sharp transitions in modulated carrier, it results
in high frequency components in the frequency domain. This is a problem
because there will be power across frequencies beyond the bandwidth of
Last few days I tried to implement RTP stream source block (based on
sync_block) and found that this simple task is not trivial, as it seems to
be, because GNU Radio scheduler and general data flow are not documented
(for users).
What mecahisms are allowed to be used in order to achieve producing
That was really a very clear explanation
Thank you so much.
Now i got the difference between the terms and also concept behind it
Thanks
sandhya
On Tue, Dec 3, 2013 at 5:27 PM, Karan Talasila karan@gmail.com wrote:
Hi Sandhya,
You need atleast 2 samples/symbol for
On Tue, Dec 03, 2013 at 03:59:34AM -0800, Artem Pisarenko wrote:
Last few days I tried to implement RTP stream source block (based on
sync_block) and found that this simple task is not trivial, as it seems to
be, because GNU Radio scheduler and general data flow are not documented
(for users).
That will easy a lot the problem in the future. It seems interesting and I
guess it won't be too hard to implement!
Raydel
2013/12/2 Dan CaJacob dan.caja...@gmail.com
I have an interesting (to me anyway) idea:
What if we added a default option to the GRC-XML-to-python converter to
add the
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
While I totally see that it's convenient to have the XML source in the
generated file, I'd still say it's a bad idea to encourage people to
use that feature.
For example:
User Alice has composed a flowgraph in GRC and has modified the python
source
Aah, so development goes on! Very interesting, I will give this a try,
thanks a lot!
Ralph.
--
Ralph A. Schmid
Mondstr. 10
90762 Fürth
+49-171-3631223
ra...@schmid.xxx
http://www.bclog.de/
From: Johannes Demel [mailto:johannes.de...@ettus.com]
Sent: Monday, December 02,
On Sun, Dec 1, 2013 at 6:24 AM, Alexandru Csete oz9...@gmail.com wrote:
Greetings,
Lately, I have been having increasing difficulties with building
gnuradio successfully on the Ubuntu PPA builders. I think the problems
is that the builds run in emulated environments and the builder is not
as
On Tue, Dec 3, 2013 at 4:52 AM, Stefan Gofferje li...@home.gofferje.net wrote:
Hi,
I recently installed some stuff on my Opensuse 12.3, including gnuradio
and QGis2.
When using QT widgets, Gnuradio GRC fails with
Traceback (most recent call last):
File /home/sgofferj/top_block.py, line
On Tue, Dec 3, 2013 at 6:07 AM, kt7 kartikset...@gmail.com wrote:
Just a follow up.
I have noticed that data demodulation is intermittent, like if I execute the
same flowgraph a number of times sometimes I get a waveform after
demodulation but most of the time received scope is blank.
I
Hi all guys,
I would like to receive in my application signals from WBX board and from
LFTX simultaneousely.
At the moment, when I run the flow graph it ends immediately with core
dump, and zero divisin exception.
In the script, sources are defined in this way:
self.uhd_usrp_source_0 =
On 12/03/2013 11:10 AM, Nemanja Savic wrote:
Hi all guys,
I would like to receive in my application signals from WBX board and
from LFTX simultaneousely.
At the moment, when I run the flow graph it ends immediately with core
dump, and zero divisin exception.
In the script, sources are
Hi,
I gave it a try, but it misses something with libfftw3.
[ 46%] Building CXX object
lib/CMakeFiles/gnuradio-lte.dir/pss_tagger_cc_impl.cc.o
[ 48%] Building CXX object lib/CMakeFiles/gnuradio-lte.dir/correlator.cc.o
[ 51%] Building CXX object
I see, but still don't get where this change should be made.
And also, more important, i I have standard configuration with 2 DDCs and 2
DUCs, then it should work like that, cause I need only 2 DDCs if I am not
wrong.
On Tue, Dec 3, 2013 at 5:15 PM, Marcus D. Leech mle...@ripnet.com wrote:
On
On 12/03/2013 12:00 PM, Nemanja Savic wrote:
Thank you Marcus again,
I changed device address, in both places, but the same problem
appears. I see that it loads now 4rx image, but the problem remains.
self.uhd_usrp_source_1 = uhd.usrp_source(
Thank you Marcus again,
I changed device address, in both places, but the same problem appears. I
see that it loads now 4rx image, but the problem remains.
self.uhd_usrp_source_1 = uhd.usrp_source(
device_addr=fpga=usrp1_fpga_4rx.rbf,
stream_args=uhd.stream_args(
Hello.
I am a graduate student researcher with the Satellite Technology Lab at The
University of Texas at Arlington.
I've been trying to find out the working behind the USRP source block. I
did find some basic description (like what it does in a few sentences and
the arguments it accepts) in the
Hi Namrata,
USRPs use UHD as their hardware driver. [1] provides lots of documentation
about USRPs.
Have fun and happy hacking
Johannes
[1] http://code.ettus.com/redmine/ettus/projects/uhd/wiki
On Tue, Dec 3, 2013 at 8:34 AM, Namrata Kamte namrata.ka...@gmail.comwrote:
Hello.
I am a
It is missing libfftw3f. Or more specific a make target. Anyway, as libfftw
is a GR dependency it is not explicitly listed for gr-lte. Just to make
things sure. Check if libfftw3 is installed.
On Tue, Dec 3, 2013 at 8:15 AM, Ralph A. Schmid, dk5ras ra...@schmid.xxxwrote:
Hi,
I gave it a
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Hi Namrata,
I think you're mixing up a lot of concepts. A block is a software
unit in the GNU Radio framework. Please read the introductory pages of
gnuradio.org to understand blocks better.
A USRP is a hardware device; it does the sampling, which,
I am transmitting and receiving from the same bladeRF board using a cable
and a 20 dB attenuator.
If you see in the flowgraph I multiply by 0.3, that is specifically to
prevent clipping and non-linearity.
I have tried using AGC or gain of low pass filter but no success.
The problem is that same
Hi all,
There's a bug in the block for the DBPSK modulator. The differential
param isn't set to True in dbpsk_mod; it's just left to default, and
differential defaults to False in the bpsk_mod block. So it really acts
like a BPSK modulator. QPSK was the same. Here's a patch.
diff --git
On Tue, Dec 3, 2013 at 1:44 PM, Kartik Seth kartikset...@gmail.com wrote:
I am transmitting and receiving from the same bladeRF board using a cable
and a 20 dB attenuator.
If you see in the flowgraph I multiply by 0.3, that is specifically to
prevent clipping and non-linearity.
I have tried
Sorry it took me a bit of time to respond. Yes, I'm sure my flowgraph is still
running and producing data as expected. Can anybody think of why the ice
endpoint would die unexpectedly?
Sean
From: Tim Newman [mailto:tim.new...@gmail.com]
Sent: Wednesday, November 13, 2013 11:42 AM
To: Nowlan,
The volk test is failing on my gnuradio build on a Beaglebone Black
(armv7h) running Arch Linux Arm.
# make test
start 1: qa_volk_test_all
*** 2 failures detected in test suite Master Test Suite1/177 Test #1:
qa_volk_test_all .***Failed9.88 sec
Full output of
Perhaps this is happening due to the ICE endpoint's TCP timeout setting. I have
it configured to 300 ms based on the example ctrlport.conf file distributed
with GNU Radio. I'll try increasing this. A few questions:
1) What disadvantages would there be to setting this to something really
When I play my data file back through a throttle and frequency translating
FIR filter to an FFT sink with repeat OFF, it seems to just show a static
plot. However, with repeat ON, I get playback, but I can't tell when data
ends and starts back over. Is there a way for me to know when it repeats?
Sorry, forgot to mention it, of course it is installed. libfftw3-3 with dev and
dbg, from the normal packet management. OS is Kubuntu 12.04 LTS 32 bit, GR3.7
installed and working, uhd, gr-osmosdr, bladerf.
Ralph,
From: Johannes Demel [mailto:johannes.de...@ettus.com]
Sent: Tuesday,
Hi list,
when I try to execute a simple code in my new USRP E110, it gives me the
following error:
uhd_sink = uhd.usrp_sink(device_addr = serial=MY_USRP_SERIAL,
stream_args=uhd.stream_args('fc32'))
File /usr/lib/python2.6/site-packages/gnuradio/uhd/__init__.py, line
116, in
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Most probably your data is simply to short in relation to the fft
length and the amount of samples your specific graphical FFT amplitude
sink drops for display.
Please review you fft length, update rate, and try out different fft
GUIs (qt/wx).
You
Hi Ralph,
On 03.12.2013 21:51, Ralph A. Schmid, dk5ras wrote:
Sorry, forgot to mention it, of course it is installed. libfftw3-3 with
dev and dbg, from the normal packet management. OS is Kubuntu 12.04 LTS
32 bit, GR3.7 installed and working, uhd, gr-osmosdr, bladerf.
the library path to
Marcus:
I like the way the waterfall looks, but I'm having the same issue as the
FFT.
Looking at the configuration for my FFT, and changing 'Refresh Rate' from
the default '15' to '1M' gives me some extra playback. My datafile was
recorded for about 20 seconds at a sample rate of 50Msps through
Have you run opkg update; opkg upgrade?
What happens if you try this with the network dos connected? (So it
doesn't see the N210)
Philip
On 12/03/2013 04:01 PM, maiconkist wrote:
Hi list,
when I try to execute a simple code in my new USRP E110, it gives me the
following error:
On Tue, Dec 3, 2013 at 3:48 PM, Tom Rondeau t...@trondeau.com wrote:
On Sun, Dec 1, 2013 at 6:24 AM, Alexandru Csete oz9...@gmail.com wrote:
Greetings,
Lately, I have been having increasing difficulties with building
gnuradio successfully on the Ubuntu PPA builders. I think the problems
is
Hi everyone,
To synchronize two USRPs, I connect them and add the following code in
the slave USRP. ---
set_clock_source( 'MIMO',0);
set_time_source('MIMO',0);
---
I have got that the length of MIMO cable is fixed because the cable
delay is
Hi,
I'm very confused with the following flow chart:
file -- throttle -- dpsk mod --- dpsk demod -- unpacked to packed --
file sink
I'm losing 2 bytes in the output file.
I've uploaded the grc here - www.anfractuosity.com/files/dpsk-test.grc
I realise the data could get corrupted due to the
Hi,
the library path to libfftw3f is actually hardcoded in the makefile.
search for
SET(FFTW3f /usr/lib/x86_64-linux-gnu/libfftw3f.so)
in gr37-lte/lib/CMakeLists.txt
and replace it with the the proper library location for your system.
for example:
SET(FFTW3f /usr/lib64/libfftw3f.so)
Hi,
I tried to build a simple flow graph of DPSK modulation and demodulation.
The result is verified using the Error Rate module. The link shows the flow
I'm using.
https://www.dropbox.com/s/jwmmttyi4es4alf/Screenshot%20from%202013-12-03%2021%3A50%3A58.png
I know that the output of demod module
Can you try using the PSK mod/demod blocks with differential=Yes instead of
the DPSK mod/demod blocks? I found an issue today with the DPSK mod/demod
blocks which results in them not actually using differential encoding.
--n
On Tue, Dec 3, 2013 at 9:00 PM, Henry Jin henry.ji...@gmail.com wrote:
On 12/03/2013 04:50 PM, Tom Rondeau wrote:
You probably upgraded your system to use QT5, which won't work with
GNU Radio. See about finding a way to switch between QT4 and QT5 on
your Suse system.
Nope, no QT5 here.
I posted the same question on the opensuse mailinglist some time ago and
On 2013-12-02 13:25, Nasi wrote:
The problem is that all frames are dropped. The copy paste of the
terminal is below:
Did you play around with the gain and see if that helps?
Is frame detection working or are you just streaming samples into the
flow graph that make absolutely no sense?
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Hi Paul!
I'm gonna go ahead and rearrange parts of your message for the ease of
reply:
My datafile was recorded for about 20 seconds at a sample rate of
50Msps through a low-pass filter to only capture 0-30MHz.
50Msps * 20s = 1Gs (you're sure your
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Looks like parts of Boost are missing (boost::filesystem).
How did you try to install GNU Radio? PyBOMBS? manually from git?
build gnuradio script?
Did building previous versions work out?
PyBOMBS is the official way to do it and usually installs all
Hi Marcus,
Thanks for the reply
Well I installed manually from git. Ok never tried with pybombs.
Even when I tried installing previous version I faced the same errors along
with the volk also failed.
Thanks
Sandhya
On Wed, Dec 4, 2013 at 12:57 PM, Marcus Müller mar...@hostalia.de wrote:
lan
I have done some research work. The input values of uhd should be -1=x1,
and the gr_multiply_const_ff block has set the default amplitude to 1, so
this block seems useless.
The only way I found to scale the power of signal we transmit is to enhance
the gain of usrp_sink. However, we use
Thank you for fast answer.
Martin Braun (CEL) wrote
There's an overview of the scheduler:
http://gnuradio.squarespace.com/blog/2013/9/15/explaining-the-gnu-radio-scheduler.html
Users, as you say, usually don't need more than this to write GNU
Radio code, and most often don't need to know
Hi guys,
whenever you have a problem and are asking the mailing list for help,
there are a few things to keep in mind. First of all, make sure you have
read this:
http://gnuradio.org/redmine/projects/gnuradio/wiki/ReportingErrors
However, there's something else you should keep in mind: If you
53 matches
Mail list logo
