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);
...
//
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 the given Doppler shift pr
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:
https://git
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___
Discuss-g
Channel models there do not use any filtering.
Isnt it like this?
I did not see any filtering in source files of channels.
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Montag, 12. Mai 2014 09:53 +0200 from Martin Braun :
On 11.05.2014 23:41, Nasi wrote:
> (Ubuntu 13.04, GNURADIO 3.7)
>
> I have a
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 a
se. In the end the best antenna was the small stock
>antenna that came with rtl2832 stick.
>
>Bogdan
>
>On Thursday, May 8, 2014 10:25 PM, Nasi wrote:
>Hi Bogdan,
>
>Did you try real TV transmission? Off air reception?
>
>
>Thu, 8 May 2014 12:22:37 -0700 (PDT)
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
>
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 wher
m/drmpeg/dtv-utils/blob/master/dvbtrate.c
>
>Ron
>
>
>
>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 :
>>>Thanks a lot! I will
Can I trans/receive without Rational Resampler?
It distorts the signal too much :(
Mon, 31 Mar 2014 20:12:27 +0400 от Nasi :
>Thanks a lot! I will try them too...
>
>
>Mon, 31 Mar 2014 09:08:04 -0700 (PDT) от Bogdan Diaconescu
>:
>>
>>One thing I did once and wor
SIGNED MESSAGE-
>Hash: SHA1
>
>I'm afraid you 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 pr
ler 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 wrote:
>Hi,
>
>Thanks!
>
>I am using collected data also as
you say.
>I am using sampli
f gnuradio-companion (e.g. ./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 wrote:
>Hi all,
>
>I am us
>*should* 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
d to add 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
age(FFTW3f)
>and use 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 flo
e is identical to the float complex
>datatype used by FFTW3F. If you 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 GN
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*) fftw_ma
lfftw3
Do you know what is it for?
-
NE
Thu, 20 Mar 2014 13:04:02 -0400 от Tom Rondeau :
>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(&
to be contiguous in memory when
>indexed.
>
>In other words:
>
>std::vector 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, 2
Can we replace Eigen with VOLK in some extent?
-
NE
Понедельник, 17 марта 2014, 11:50 +01:00 от Moritz Fischer
:
>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 speedup when compared to
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:
vector y1;
Can I multiply this vector to another vector using VOLK?
Is there any good documentation for this?
--
NE___
Dis
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 elements
n 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 :
>Hi Nasi,
>
>when I checked the fading models supplied in GNU Radio 3.7 the other week they
>seemed to be generating nasty
, 2 марта 2014, 15:26 +01:00 от Martin Braun
:
>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.
>
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 s
Hi all,
Do you know any project related to DVB-T2 (TV) standard?
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Discuss-gnuradio mailing list
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https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
, int Fd_min,
int Fd_max variables.
Среда, 29 января 2014, 12:53 +01:00 от Martin Braun :
>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), i
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 : boost::this_th
more 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 :
>Hi Nasi,
>
>
>>And the problem is in that input part. It is not clear what is inbuf...
>>I cr
language.
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Freitag, 24. Januar 2014 13:59 +0100 from Martin Braun
:
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
nt FFT and are linking
>against GR 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 cre
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?
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Discuss-gnura
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 a
---
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 192.
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 19
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?
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Discuss-gnuradio mailing list
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ht
>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
> 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. An
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 ./ofdm_tx.
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?
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 <
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 first
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 wit
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 an
Dear All,
Do you know any project related to channel estimation e.g., dictionary based
compressed sensing, matching pursuit?
Thanks in advance!
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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
-- Curren
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,
>
>> 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
>s
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