Wao superb! you cleaned it out also. Yes it works. Thanks much.
But did you figure out what was the issue at the first place :)
I have another related question about the wireshark connector in
transceiver_OQPSK.grc. I see that wireshark connector gets input from two
different outputs.
One fro
Hello Bastian,
Sorry for late response.
I am attaching the files for your reference. There are 2 grc files
1. wifi_zigbee.grc : wifi and zigbee loopbacks are running in parallel >>
works good
2. wifi_zigbee_interference.grc : Here I interpolate the zigbee output by 5,
feed to channel, add to 2
Hello,
(Its a long post :) as I want to give as much details as possible)
Today I did a strange experiment. Under GNU Radio companion, I created a
blank project. Then I copy pasted the wifi_loopback.grc from gr-ieee 802.11
to my blank project and made it run. Off course I took care of the initial
Hello Chris & Marcus,
Even after installing libssl-dev, the issue persist.
I am trying to install RFNoC thru pybombs, and its not going ahead at all
:-/
Regards
Sumit
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Hello Bastian,
Yes I used PCIe(X300). I measured two things. One "rtt" with
latency_test.cpp which gave 80 microsecs
and another receiver latency where I set the GPIO HIGH as soon as the
receive power exceeds a threshold. I made a custom C++ script for this. This
gave 52 microsecs.
Regards
Su
Hello Bastian,
How much the delay between sensing the channel and sending the ACK should
be. With X300 I was able to achieve a minm of 80 microsecs round trip time.
Not less than that.
I am now sure that it cant be done on GPP, just wondering how fast it should
be. If you can direct me to some
Hi,
With gr-ieee 802.11, I know that SIFS cannot be respected becz of USB delays
(B210), but what we can also try is that : sending ACK packet before all the
layer-2 retries are exhausted ! Instead of sending ACK withing 10 microsecs.
In this way, the throughput will be down for sure but the de
Hello,
How does GNU Radio implementation of 802.15.4 handles multi path ?
In general does the commercial ZigBee receiver have any equalizer ?
Regards
Sumit
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Hello,
While using the transmitter of gr-ieee 802.11, there is a parameter named
interval. This is an input to message strobe.
And message strobe is supposed to send messages after every "interval".
Between that "interval", there is no transmission right ? So is there any
zero padding of comp
Hello,
I am trying to use Pybombs to install GR. I am not used to Pybombs :)
How to solve this? Log is below :
PyBOMBS.install_manager - INFO - Phase 2: Recursively installing source
packages to prefix:
PyBOMBS.install_manager - INFO - Installing package: apache-thrift
Cloning: (100%)
[=
Hello,
If anyone has used gr-doa, what is the angular resolution ?
Is it possible to tweak the code of gr-doa and see the functionality using
B210 ?
Regards
Sumit
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Hello,
Do we have control port based performance monitor in gr-ieee 802.11
The documentations says that it has :
"If you see warnings that blocks_ctrlport_monitor_performance is missing
that means that you installed GNU Radio without control port or performance
counters. These blocks allow you
Hello Manolis,
Had any luck in getting the code open source ? :)
Regards
Sumit
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Hello,
Has anyone tried integration of gr-ieee 802.11 with Linux stack
(wpa_supplicant)?
Regards
Sumit
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Hello,
I have my custom build 802.11g transmitter connected to gr-ieee 802.11
receiver. Receiver decodes my data correctly and wireshark connector shows
that it is receiving valid packets with all the fields. gr-ieee 802.11 dumps
the decoded data in .pcap format and I see them by piping to wiresh
Hello,
I was wondering how GNU Radio implements receive buffer while receiving the
data from an SDR.
Is it like a very long circular buffer. The UHD thread starts filling the
buffer from one end, meanwhile the receiver thread also starts processing
it.
The time when UHD thread reaches the end
Yes, for sure. That's the property of short training sequence I think.
In SORA and my code we have already saved frequency domain values of the
short training and long training sequence with which we correlate the
incoming samples and look for sharp peaks and then count the peaks.
For my code it
Hello Marcus,
Thanks for the informative reply.
Right now I was using Cross-correlation based method for my preamble search.
It works good, but I have not tested it in real-time, so I am unsure about
its performance.
However I checked gr-ieee 802.11 implementation, which is another
implementa
Hello,
I was going thru the implementation of ofdm_sync_sc_cfb_impl.cc. As it says,
it implements
[1] Schmidl, T.M. and Cox, D.C., "Robust frequency and timing
synchronization for OFDM", Communications, IEEE Transactions on, 1997.
with modified normalization.
However I was wondering that in i
Thanks Dennis, it was very explanatory indeed !
Yes I am using mutex locks. But I think 50 threads is a over kill.
Also I realized that GNU Radio has thread per block while for my application
I made 50 receiver threads. I will try doing threads for every block
instead.
For some reasons I cannot
Ok, I got it.
Meanwhile I am very optimistic to understand how GNU Radio deals with
threading and burrow some of those concepts in my framework using pthreads
:)
Is the following presentation by Tom is good to start with ?
http://www.trondeau.com/blog/2013/9/15/explaining-the-gnu-radio-schedule
Marcus, please correct if my understanding is wrong in the following :
If a rx is something like this :
[preamble search] -> [frame alignment] --> [deinterleaver] --> [decoder]
--> [descrambler]
So with GNU Radio framework there will one thread for each of the [ ]
bracketed component ?
-
Ok, I went thru the paper briefly, so it seems that GNU Radio takes care of
the threads for all the blocks.
"By default GNU Radio starts one thread for every block in the flow graph."
I need to investigate if I am doing overkill by initiating 50 threads for my
receiver block !
I am making dot
Hello,
I am in the process of constructing my own 802.11 receiver using C and UHD.
I was looking at the implementation of gr-ieee 802.11.
I am trying to figure out how many parallel threads it is using for the
receiver and transmitter. In order to work in real time, especially decoding
802.11 pa
Hello,
I am playing back a data using file source (file recorded from MATLAB and
converted to .bin) in gnuradio-companion and feeding it to USRP.
I have checked "Repeat : Yes" How can I introduce some delay/idle time
between the repetitions.
TIA
Sumit
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Does anyone have recorded samples of bluetooth. I was working with
gr-bluetooth. Some of the traces supplied with the package are ending
abruptly without any output. So I was thinking to try with new traces.
I don't have immediate access to my USRPs. So if anyone have them, please
share.
TIA
S
I was installing GNU Radio and UHD using build-gnuradio script. I see that
the changelog of UHD at
https://github.com/EttusResearch/uhd
says that the latest release is 3.9.2 but the script installs
UHD_003.010.git-119-g42a3eeb6
What I am missing here ?
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Hi Community,
I have to procure a couple of laptops with Gig-E port for working with N
series. Could you suggest some. Till now I was working with Desktops, but I
have to travel frequently these days for demos. I did search but would like
to listen from other members also.
Regards
Sumit
--
Vi
Update :
1. I will be doing demonstrations of FunCube Dongle with GNU Radio and some
other windows based applications. You can come and watch before purchasing
this little demon :)
2. Demonstration with some basic applications of USRP and GNU Radio
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Dear Group,
We are doing a multi-disciplinary faculty summit in Gr. Noida on 8th
March'14. Wireless communication is also one of the parallel tracks. Sole
purpose of the summit is to create awareness about SDR and recent trends in
wireless communications. There will be demonstration of SDR40 by Am
static also not working. Throwing same error.
I downloaded from here
https://github.com/kit-cel/gr-lte/tree/gnuradio-v3.6.5.1
Also one strange thing. When I drag the first block named block_tests
..nothing happens ! ... Just a blank palette of grc comes..
I think I shall grab 3.7
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I am facing this error while during make of gr-lte(3.6.5.1)
OS : Ubuntu 12.04
GNU Radio ver : 3.6.5.1
GCC : 4.6.3
~
make -j5
Scanning dependencies of target pygen_apps_9a6dd
Scanning dependencies of target _lte_swig_swig_tag
Hello friends .. I along with my colleagues will be taking introductory
sessions on SDR, GNU Radio and USRP. National instruments will also be
demonstrating some cool sdr applications.
** Apology for telling at a short notice.
The event is open for both faculty and students. Here is the list of
I am having gnuradio version 3.6.5.1 which I installed 3 weeks back with
build-gnuradio script.
I am running usrp_spectrum_sense.py on B100 (Serial EDR13W5B1)
When I run it it simply gets stuck and not responds to ctrl+c , then I have
to forcibly kill the process.
At the same time in another machi
Marcus.. that easiest method gave me for a temporary solution... and I am
happy with it for the time being
cheers
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I have an application where I observe real time display of some bands. What I
want to do is make a FIFO/Buffer where the data can be stored simultaneously
and with a push button 'rewind' I can access the immediate past 15 sec data.
So basically I want to know how to make a such file sink, which ca
Yes there is an Agilent Sesnor Access Library .. I think I can get some help
from there. Sure I will put on CGRAN if something interesting came out :)
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Has anybody worked on interfacing GNU Radio with N6841A RF Sensor
http://www.home.agilent.com/en/pd-1414739-pn-N6841A/rf-sensor
Doable ??
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(Face palm) !! I should have seen this before. Actually I make a sink to get
the data dumped for offline analysis. And while running dint put the
argument for the file path Epic mistake
Shall put an if-else for running without sink too.
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Yesterday I made a VM with Ubuntu 10.04 and installed gnuradio (3.6.5.1).
*uhd_find_devices is working fine *
$ uhd_find_devices
linux; GNU C++ version 4.4.3; Boost_104000; UHD_003.005.003-123-g1c391767
--
-- UHD Device 0
-
Is scipy installed in your system ?
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Hi Community,
Just uploaded some more screen casts on basic things on my channel
http://www.youtube.com/user/2011HPS under the play list
"GNURADIO Experiments for Fun"
http://www.youtube.com/playlist?feature=addto&list=PLwRhd5DzzaXA-poBmKgWv1BQYJT_i6VO2
http://www.youtube.com/watch?v=vVObMECw23A
But if I modify here, I have to recompile the whole code again .. meanwhile I
worked around a process which kills this receiver with the PID
I am writing the packet no in a file, another script checks for content of
the file, if it is empty , it kills the receiver... working smooth so far !!
I am
Nathan ... having some problem with my gnuradio installation. Once solved,
will try the method you told and get back to you.
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Some additional details.
OS : Ubuntu 10.04
cmake : 2.8.0-5
boost : 1.40
cppunit : 1.12-1
fftw : 3.2.2-1
python : 2.6.5
swig : 1.3.40
~~
Just 10 days ago I got all the things properly installed with the same
settings.
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Since 2 days I am trying to install GNU Radio with marcus scripts. UHD is
getting installed perfectly but GNU Radio exits by saying "Make failed" ...
Then I tried doing it manually.
It failed there also.
Here is the error
~
How can I terminate benchmark_rx.py after a certain number of TIMEOUTS.
I have observed two things
1. When I dump Tx data using --to-file option and then demod them using
benchmark_rx , benchmark_rx terminates after demod. No waiting !
2. When I use benchmark_rx for OTA reception with USRP, an
And it worked I was directly doing tar -zxvf earlier
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D
Tom I was trying to download the mpsk grc files from
http://gnuradio.squarespace.com/gr-tutorial/ but they are not working it
seems. Saying archive is corrupt. Can you please check once.
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Tom I observed following :
I connected 3 usrp-1 and ran 3 scripts activate_usrp_1.sh, 2.sh, 3.sh
All were asked to execute at 44th second of any minute.
I also put a time stamp just after tb.start()
try:
tb.start()
startTime = datetime.now()
print "usrp_X started at tim
Hmm putting the delay works ..but this is I wanted to avoid i.e. putting a
few seconds delay .. any ways can't help after knowing the reason you told
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Marcus I have two separate usrp-1 connected for each script as you can see
them in the argument field --- lab_2 , lab_4
My motive is two invoke each script simultaneously i.e. both the usrp will
start simultaneously and dump the sensing data from different bands.
8 out of 10 times it is working
I have created two copies of the usrp_spectrum_sense.py for wideband spectrum
sensing. Each one of them collects data from a different frequency band and
then finally fusion takes place.
I am invoking both the scripts from bash with a timer which make them
execute at the same instance of time.
Con
Tom what do you mean by using different Tx & Rx frequencies.
Also recently I did following. I connected 2 usrp with a single PC and ran 2
instances of tunnel in it with 1 usrp for each. Made two virtual ethernet
interfaces gr0 & gr1 also set two different ip addresses. And I was able to
ping from
Did you get some solution Nazmul ? I'm curious to know
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Yeah ..Done already
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Well I am pretty sure that your query is more complicated than what I am
thinking, but I did the following just to check. Inside the work function of
howto_square_ff.cc
I pasted following lines
ofstream outdata;
int i; // loop index
int num[5] = {4, 3, 6, 7, 12}; // list
Although I have not done that much work on work() so far but out of curiosity
am asking : can't we write temp to some file , inside the block of work()
itself so we need not to make it as output.
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Yeah .. a whole lot of patching is required to make them work. i included
digital, then replaced bpsk_mapper by ofdm_mapper_bcv , then copied the
rotation constellation vector from ofdm.py ... and then happily tried to run
it
.. but some other files are also missing like gr_ofdm_correlator.h .. so
Are you talking about gr.file_sink() ?
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Have a look on this
http://sumitgnuradio.blogspot.in/2012/10/problem-of-frequency-offset.html
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gr_delay pads "delay" number of zeros at the beginning of the sequence.
see qa_delay.py in gnuradio/gnuradio-core/src/python/gnuradio/gr
I also wanted to throw away some samples at the beginning, I imported the
collected data in MATLAB, then threw away some samples and got it back in
gnuradio .
Did you compensate for the LO offset between Tx and Rx ?
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I think that to get one FFT reading shall equal dwell_delay + tune delay
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_
After doing some digging I found following issues :
*Reg : ofdm_bpsk_mapper*
I just found out that there is no ofdm_bpsk_mapper source file in the
current gnuradio source code. I was expecting
gr_ofdm_bpsk_mapper.cc
gr_ofdm_bpsk_mapper.h
gr_ofdm_bpsk_mapper.i
There are only demapper files :
Thanks for appreciation Mark
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Thanks Tom.
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https://li
Thanks Martin for including the links. I just now made the account on
gnuradio.org ,
username : sumitstop
mail id : sumit.ku...@research.iiit.ac.in
Kindly add me as contributor.
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Sent
I have gnuradio version 3.6.2-13-g65ea256f
Q1 : In the directory */usr/local/share/gnuradio/examples/digital/ofdm* I
tried to run ofdm_mod_demod_test.py
but it threw the error * 'module' object has no attribute
'ofdm_bpsk_mapper'*
I tried to locate ofdm_bpsk_mapper but couldn't find it in my syst
Thanks for the appreciation Tom !!
Will keep these basic things posting...
btw whom shall I contact so that these links get included on gnuradio.org
...
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Hi Community,
Just tried to write a couple of scripts for the new comers on GNU Radio and
USRP. I have given detailed explanation step by step on how to quickly get
data from USRP by writing your own program , without any knowledge of python
or C++
I have posted them on my blog, here are the links
Thanks Tom .. got it !!
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Q: What is the difference between gr.file_descriptor_source/sink and
gr.file_source/sink .. I mean when shall we prefer one over other ?
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Yeah it worked , although there are significant truncation errors ...
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Hi, I have recorded some WCDMA data using gnuradio and USRP2 which is in .bin
format (fc32).Then I used octave to read that bin file and converted to .mat
file so that it can be imported into MATLAB. I did some processing on that
data. Now I want that .mat file to be converted back to .bin file. I
Ohh .. got it .. that's why I couldn't find swig files for
adaptive_fir_ccc_impl !!
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I saw two types of adaptive filter files and headers.
One is gnuradio/gnuradio-core/src/lib/filter/*gr_adaptive_fir_ccc.cc* with
header *gr_adaptive_fir_ccc.h*
While another is /gnuradio/gr-filter/lib/*adaptive_fir_ccc_impl.cc* with
header *adaptive_fir_ccc_impl.h*
So what is the difference bet
Got it perfectly
**Just observed that in uhd_rx_cfile tb.run() has been used.
When we leave the number of samples blank i.e. infinity the script keeps
collecting data because of tb.run() but when we choose the no of samples
option, a separate gr.head is block is created with specified no of sa
Thanks Josh .. got it ..
that last one stop() + wait() I forgot to check by myself before posting ..
sorry for that
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Whats the difference between using tb.start() + tb.wait() Vs tb.run() Vs
tb.stop + tb.wait()
All the three are giving me the same result for the following code
*tb.start() + tb.wait() *
if __name__ == '__main__':
tb = rx_cfile_block1(245000,'/home/sumit/first_app_data1')
tb.start()
Q-1
In the gr_top_block.h the start function has been defined as follows :
~~
void start(int max_noutput_items=10);
/*!
* Stop the running flowgraph. Notifies each thread created by the
* scheduler to shutdown, then returns to call
"global name 'midn' is not defined window.py"
It appears when we try to use windows other than the five windows described
at the bottom of the window.py (because they are not using midn)
I tried to search on community and found following two links but both are
unanswered
http://gnuradio.4.n7.n
Hi Community,
I have just uploaded some more screen casts. There are 6 of them.
One is about basic hacking with the dial_tone.py script so that the
beginners get a flavour of doing customization without knowing much of the
language paradigms.
here is the link (its under GNURADIO Experiments for F
Hi Comunity,
I have just uploaded some more screen casts. There are 6 of them.
One is about basic hacking with the dial_tone.py script so that the
beginners get a flavour of doing customization without knowing much of the
language paradigms.
here is the link (its under GNURADIO Experiments for F
Iso image of Ubuntu+Gnuradio installed inside a vmware player ... is this
what you want ? Its easy and you can make by yourself :)
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Finally recorded it with my newly arrived SBX
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Does anyone have recorded WCDMA downlink data . I am trying to work on echo
canceller for WCDMA repeaters using gnuradio. I tried getting data from
WCDMA model of Simulink but the received power level has wide variance.
Normally it shall be from -50 to -80 dB but the Simulink model is giving
data w
Hi Community,
Just created a new playlist on my channel. Its about random experiments with
gnuradio for fun. I hope the new comers will enjoy it.
Here is the link to the playlist.
http://www.youtube.com/playlist?list=PLwRhd5DzzaXA-poBmKgWv1BQYJT_i6VO2
More videos are coming soon.
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Hi Community,
I have uploaded some videos showing
1. How to do offline plotting of data using gr_plot tools
2. How to generate data for various modulation schemes in gnuradio-companion
and plotting as well observing their constellation
3. Finally some playing with OFDM in gnuradio-companion
Here
Thanks Josh I did it :)
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h
you don't want to type
> those lines every time your system restarts.
>
> Regards,
> Ryan
>
> On Fri, Aug 24, 2012 at 6:41 AM, sumitstop
> wrote:
>
>>
>> Hi Community ,
>> Whenever we open a UHD device following message appears on the term
Hi Community ,
Whenever we open a UHD device following message appears on the terminal :
linux; GNU C++ version 4.4.3; Boost_104000; UHD_003.004.003-177-g584b7ae2
-- Opening a USRP2/N-Series device...
-- Current recv frame size: 1472 bytes
-- Curre
Hi Sreeraj,
Thanks for the reply.
sreeraj r wrote:
>
>
>
>>Question - 1
>>
>>I was working with the UHD version of spectrum sensing code.
>>
>>I have USRP2 with me. I learnt that USRP2 can achieve 50MHz of RF
bandwidth
>>with 8 bit samples and 25MHz of RF bandwidth with 16 bit samples.
>>
>>
Hi Chen,
I was also doing the same as you asked. Since energy equals the sum of all
FFT coefficients hence summation of all FFT bins looks reasonable to me.
:teeth:
cdong8812 wrote:
>
> Hi,
> I'm currently working on a project about spectrum sensing and I went over
> the USRP_Spectrun_Sense cod
Hi Community,
Question - 1
I was working with the UHD version of spectrum sensing code.
I have USRP2 with me. I learnt that USRP2 can achieve 50MHz of RF bandwidth
with 8 bit samples and 25MHz of RF bandwidth with 16 bit samples.
I wanted to know how does this information translates while pas
when I restarted the system.
lee me know the situation after you are done with this
nadya hassan wrote:
>
> hi sumitstop,
> i am trying to ping using the same IP address (192.168.200.1 &
> 192.168.200.2) put it doesn't work with me :( and give me distnation
> unreachable ,
a
> few now, and Youtube doesn't make it easy to navigate through them by
> default unless you create playlists from them.
>
> Cheers,
> Ben
>
>
> On Sat, Jun 23, 2012 at 8:04 PM, sumitstop
> wrote:
>
>>
>> Hi Community,
>>
>> I have
e=plcp
I am sorry for the disturbing audio quality. My sound card is picking some
noise even after I am opting for mute. Please mute the audio while watching
the screencasts :)
More screencasts will be up very soon.
:working:
sumitstop wrote:
>
> Hi Community,
> I have just uploaded
the recordings
:) Hence I was able to record for more than 50 mins :P
Here is the link
http://www.youtube.com/watch?v=UaST-ajS4EY&feature=plcp
More screencasts will be up very soon.
:working:
sumitstop wrote:
>
>
> Hi Community , some more video are up !!
>
> I have
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