Dear members,
does anyone know how to use Eigen C++ template library in GNURADIO?
my OS is Ubuntu 16.04 lts.
gnuradio version 3.7.10,
I can use it separately as c++ library by adding these lines:
#include
#include
#include
...
VectorXcf fftshiftXcf(VectorXcf x, int NFFT);
...
just a lookup table for sin and cos values for
>speed optimisation.)
>
>I hope that didn’t confuse even more...
>
>Best,
>Bastian
>
>
>
>>On 22 Feb 2016, at 06:41, Nasi < nesaz...@mail.ru > wrote:
>>Hello,
>>
>>The question is about how does t
Hello,
The question is about how does the given Doppler shift progress, or how is the
Doppler induced phase shift implemented.
I select a simple frequency selective fading block and feed in it some
gr_complex(1, 0) values. For simplicity I run one fader (num of sinusoids).
in file:
Hi all,
I am using GNURADIO 3.7 and Ubuntu 13.
I want to know if the channel models (Doppler shift) is the same/similar with
matlab channel models (Doppler shift).
Did someone compare them?
I am inetersted in Doppler shift part.
--
NE___
Channel models there do not use any filtering.
Isnt it like this?
I did not see any filtering in source files of channels.
Sent from Mail.Ru app for iOS
Montag, 12. Mai 2014 09:53 +0200 from Martin Braun martin.br...@ettus.com:
On 11.05.2014 23:41, Nasi wrote:
(Ubuntu 13.04, GNURADIO 3.7
Hi all,
(Ubuntu 13.04, GNURADIO 3.7)
I have a question regarding the channel models. As far I know the channel
function must be convolved (convolution) with the input to get the output like
this:
out = conv(in,channel)
In GNURADIO I can not find this convolution or any filter to do that. I
Hi,
(Ubuntu 13.04, GNURADIO 3.7)
HI all,
I want to collect TV data using usrpN200 + TVRX2 50-860 MHz Rx x 2 for DVB-T .
Here are my questions:
- Is it possible to receive directly with a sampling rate of 9.14 Mps for
DVB-T? Or should I resample it from 10 Mps? I was resampling with
the best antenna was the small stock
antenna that came with rtl2832 stick.
Bogdan
On Thursday, May 8, 2014 10:25 PM, Nasi nesaz...@mail.ru wrote:
Hi Bogdan,
Did you try real TV transmission? Off air reception?
Thu, 8 May 2014 12:22:37 -0700 (PDT) от Bogdan Diaconescu
b_diacone...@yahoo.com:
Hi
Hi all,
(Ubuntu 1304 gnuradio 3.7)
I want to test OFDM in gr_digital using tx_ofdm.grc and rx_ofdm.grc.
(simultaneously using usrp n200 devices)
Where are UHD source and sink in that flow g.?
Since I do not want to add them myself, I want to see how the original system
works.
Do you know
On 4/17/2014 7:07 AM, Nasi wrote: Can I trans/receive without Rational
Resampler?
It distorts the signal too much :(
Mon, 31 Mar 2014 20:12:27 +0400 от Nasi nesaz...@mail.ru :
Thanks a lot! I will try them too...
Mon, 31 Mar 2014 09:08:04 -0700 (PDT) от Bogdan
Diaconescu
Can I trans/receive without Rational Resampler?
It distorts the signal too much :(
Mon, 31 Mar 2014 20:12:27 +0400 от Nasi nesaz...@mail.ru:
Thanks a lot! I will try them too...
Mon, 31 Mar 2014 09:08:04 -0700 (PDT) от Bogdan Diaconescu
b_diacone...@yahoo.com:
One thing I did once
. ./top_block out.txt) after
you have generated the flowgraph. The gnuradio-companion cannot cope with big
amount of data when the blocks gets out a lot of
text.
Bogdan
On Monday, March 31, 2014 1:22 PM, Nasi nesaz...@mail.ru wrote:
Hi all,
I am using ubuntu 13.04, GNURADIO 3.7.
I cannot transmit
with the rational resampler you
need to set-up the USRP at 10Msps. 1Msps will not work as only a part of the
spectrum will be received.
Bogdan
On Monday, March 31, 2014 6:36 PM, Nasi nesaz...@mail.ru wrote:
Hi,
Thanks!
I am using collected data also as
you say.
I am using sampling rate of 1 Mbps
can't reduce needed sample rate for a fixed bandwidth.
You need a stronger laptop. Often, plugging it into mains power helps.
Marcus
On 31.03.2014 17:52, Nasi wrote:
ohhh, now I understand. It produces in the transmitter side -
which probably means underflow with my laptop. Do you know how
Hi all,
I am using ubuntu 13.04 and GNURADIO 3.7.
In project https://github.com/BogdanDIA/gr-dvbt , in reference_signals_impl.cc
in /lib, I add inside one of the functions:
fftw_complex *in2, *out2;
out2 = (fftw_complex*) fftw_malloc(NFFT*2*sizeof(fftw_complex));
in2 = (fftw_complex*)
want to use that, use the float
version of the library and replace fftw_malloc by fftwf_malloc and so on.
On 21.03.2014 10:35, Nasi wrote:
Hi all,
I am using ubuntu 13.04 and GNURADIO 3.7.
In project https://github.com/BogdanDIA/gr-dvbt , in
reference_signals_impl.cc in /lib, I add
the FindFFTW3f.cmake from the gnuradio source tree.
You'll have to replace all occurences of FFTW3_ by FFTW3F_ in your
CMake files.
On 21.03.2014 11:42, Nasi wrote:
Thanks for quick reply!
It does not work even if I use float precision as fftwf_complex
*in2, *out2; out2 = (fftwf_complex
the FFTW3F_LIBRARIES to the target_link_libraries.
On 21.03.2014 12:02, Nasi wrote:
target_link_libraries(gnuradio-dvbt ${Boost_LIBRARIES}
${GNURADIO_RUNTIME_LIBRARIES} ${VOLK_LIBRARIES})
-BEGIN PGP SIGNATURE-
Version: GnuPG v1
Comment: Using GnuPG with Thunderbird - http
* be linked against FFTW3f. Are you sure you replace
fftw_malloc and fftw_whatever by fftwf_whatever in your C++ code?
On 21.03.2014 12:13, Nasi wrote:
I added target_link_libraries(gnuradio-dvbt ${Boost_LIBRARIES}
${GNURADIO_RUNTIME_LIBRARIES} ${VOLK_LIBRARIES}
${FFTW3F_LIBRARIES
Hi all,
I am using ubuntu 13.04, GNUradio 3.7.
I have a question related to VOLK library.
When I create a vector, lets say:
vectorgr_complex y1;
Can I multiply this vector to another vector using VOLK?
Is there any good documentation for this?
--
Can we replace Eigen with VOLK in some extent?
-
NE
Понедельник, 17 марта 2014, 11:50 +01:00 от Moritz Fischer
moritz.fisc...@ettus.com:
Hi BZS,
Eigen is a pretty good library. Other's that might come to might is
using blas/lapack in fortran or armadillo. I wouldn't expect too much
of a
indexed.
In other words:
std::vectorgr_complex x;
volk_32fc_something_32fc(x[0], ...);
Tom
On Thu, Mar 20, 2014 at 10:07 AM, Tom Rondeau t...@trondeau.com wrote:
On Thu, Mar 20, 2014 at 7:05 AM, Nasi nesaz...@mail.ru wrote:
Hi all,
I am using ubuntu 13.04, GNUradio 3.7.
I have
know what is it for?
-
NE
Thu, 20 Mar 2014 13:04:02 -0400 от Tom Rondeau t...@trondeau.com:
On Thu, Mar 20, 2014 at 12:51 PM, Nasi nesaz...@mail.ru wrote:
Thanks!
As I see you apply it to the first element of x as in
volk_32fc_something_32fc(x[0], ...);.
I want to multiply the whole vector
Hi all,
I am using GNURADIO 3.7, Ubuntu 13.04
I want to generate dictionary elements using flow graph.
dvbt_dictionary block connects to FFT block it connects to dvbt_dictionary2 and
again after FFT block it connects to dvbt_dictionary3.
dvbt_dictionary2.cc saves files as a dictionary
in the receiver as a part of my research work.
I will appreciate your comments on this.
Best,
-
Nasimi
Четверг, 6 марта 2014, 8:56 +13:00 от Richard Clarke rich...@clarke.biz:
Hi Nasi,
when I checked the fading models supplied in GNU Radio 3.7 the other week they
seemed to be generating nasty glitches
, 2 марта 2014, 15:26 +01:00 от Martin Braun
martin.br...@ettus.com:
On 03/01/2014 04:35 PM, Nasi wrote:
Helo all,
I need your help for simulation of the Rayleigh fading.
I know that I can use GNURADIO channel models, but I need to know how
they simulated.
For example I am looking
Hi all,
Do you know any project related to DVB-T2 (TV) standard?
--
NE___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Helo all,
I need your help for simulation of the Rayleigh fading.
I know that I can use GNURADIO channel models, but I need to know how they
simulated.
For example I am looking into the 'fading_model_impl.cc' in channel models of
GNURADIO.
Can someone tell me how this is simulated?
I heard
Hi all,
I've created a simple flow graph with three components. The first one generates
K * L number of values (it is a loop), it passes them to the next one where I
do some operations on them.
I want it to run just once and then stop it. Therefore In The first component I
add :
, int Fd_min,
int Fd_max variables.
Среда, 29 января 2014, 12:53 +01:00 от Martin Braun martin.br...@ettus.com:
On 29.01.2014 12:30, Nasi wrote:
Hi all,
I've created a simple flow graph with three components. The first one
generates K * L number of values (it is a loop), it passes them
language.
Sent from Mail.Ru app for iOS
Freitag, 24. Januar 2014 13:59 +0100 from Martin Braun
martin.br...@ettus.com:
On 01/24/2014 02:45 AM, Nasi wrote:
Thanks!
with doxygen docs do you mean
these: http://gnuradio.org/doc/doxygen/classgr_1_1fft_1_1fft__complex.html ?
this redundant
users will implement your
code. It is a kind of marketing.
Apart from all, I respect all what have done up to now.
Пятница, 24 января 2014, 10:03 -05:00 от Aditya Dhananjay adi...@cs.nyu.edu:
Hi Nasi,
And the problem is in that input part. It is not clear what is inbuf...
I create gr_complex
Hi all,
I know there is an FFT block in gnuradio 3.7.
I want to create a cc file and add some gnuradio classes there.
Can I use FFT without .grc file without using blocks, just as a c++ function?
--
NE___
Discuss-gnuradio mailing list
anyway, use gr-fft.
Greetings,
Marcus
[1] Fastest Fourier Transform in the West, http://www.fftw.org/
On 23.01.2014 20:17, Nasi wrote:
Hi all,
I know there is an FFT block in gnuradio 3.7. I want to create a cc
file and add some gnuradio classes there. Can I use FFT without
.grc file without
Hi all,
I am looking for any function/code or project which is helpful to solve a
linear equation system by Gaussian elimination (or other kinds of matrix
inversion).
We know that In matlab there are many functions for this. I would be happy to
get any hint from you to do that with gnuradio
It is very annoying that sometimes I can not connect to the device using this
command:
~$ sudo ifconfig eth0 192.168.10.1
I can ping 192.168.10.1, but ping 192.168.10.2 fails:
~$ sudo ifconfig eth0 192.168.10.1
~$ ping 192.168.10.2
PING 192.168.10.2 (192.168.10.2) 56(84) bytes of data.
From
---
Ubuntu 13.04, gnuradio 3.7, usrp N200
---
It is very annoying that sometimes I can not connect to the device using this
command:
~$ sudo ifconfig eth0
I am using USRP N200 with GNURADIO v3.7 and Ubuntu 13.04.
It stopped working unexpectedly. I see that the led E is off always.
Everything seems ok.
Do you know what can cause this?
--
NE___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
Dear All,
I need your help. May be any of you had such a problem before:
I use 'IEEE 802.11 a/g/p OFDM Transceiver' project, Ubuntu 13.04, GNURADIO 3.7
and (USRP N200 + XCVR 2450 + VERT2450 antenna).
I start the transmission using the first laptop and USRP N200 device by running
the
Meanwhile I use the second laptop and USRP N200 device as the receiver by
running the ./ofdm_rx.py. The error rate is very high.
So you receive some packets or none? Yes, I receive hopefully. But the packer
error rate is too high. I went through different configurations and gains. And
Just to be sure: do you have the current version? (some weeks ago I normalized
the signal power to 1 without pushing updates of the flow graphs. That lead to
distorted signals. In that case, changing the gain does not help.) I
reinstalled it previous week, I guess on Saturday. Before it was
Hi,
I am using gnu 3.7, Ubuntu 13.04, USRP N200 with XCVR2450.
When I run gr-uhd/ examples/grc$ sudo ./uhd_tx_dpsk.py I can increase tx gain
to more than 20 dB. The power of the XCRV2450 is 100mW.
In this case the sink or the source will react to an higher gain (20dB).
1. Why does it happen?
Dear All,
I am trying to transmit something and receive it back using the second USRP
N200 device.
However it fails, or I did not do it correctly.
I have two laptops and two (USRP N200, XCRV2450 db, 2 vert2450 antennas for
each)s.
GNURADIO v3.7 is installed to Ubuntu 13.04.
I run in the
It seems like I receive everything wrongly in the device. That looks like a
device problem.
Did you play around with the gain and see if that helps?
That did not help. The problem is that in the file '' the code always checks
for the value:
if(result.checksum() != 558161692) {
dout checksum
Hi,
Thanks for reply!
Did you play around with the gain and see if that helps?
That did not help. The problem is that in the file '' the code always checks
for the value:
if(result.checksum() != 558161692) {
dout checksum wrong -- dropping std::endl;
return;
}
I am not familiar with CRC.
Dear All,
I need your help. May be someone did it before:
I use 'IEEE 802.11 a/g/p OFDM Transceiver' project, Ubuntu 13.04, GNURADIO 3.7.
I start the transmission using the first laptop and USRP N200 device by running
the ./ofdm_tx.py.
It is transmitting;
Meanwhile I use the second laptop
Dear All,
Do you know any project related to channel estimation e.g., dictionary based
compressed sensing, matching pursuit?
Thanks in advance!
--
NE___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
Dear All,
my device: USRP N200
System: Ubuntu 13.04
1. I always get this on first connections (the next ones are okay):
$ uhd_usrp_probe
linux; GNU C++ version 4.7.3; Boost_105300; UHD_003.006.000-0-g7788c692
-- Opening a USRP2/N-Series device...
-- Current recv frame size: 1472 bytes
--
I did that before already. Nothing changed now also.
That means it works, or it does not?
it looks like receiver is working. I think so, because I receive/see around 30
packets in wireshark. And the led C is on.
It crashes? Underruns? Overruns? Are there any messages? How do you know
Finally, solved!
Many thanks Bastian!
The problem was the connections between blocks, acc to
http://www.ccs-labs.org/~bloessl/grc.png .
On 11/27/2013 05:51 PM, Nasi wrote:
I did that before already. Nothing changed now also.
That means it works, or it does not?
it looks like
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