Dear all,
I was working for some time on a project of a set of GNU Radio tools for
receiving GSM transmissions. As the project reached the point where it
might be useful for the community I have decided to officially announce
it. It is available on github with short installation and usage guides:
Hi all,
Interruptions transmission over Gigabit Ethernet when receiving samples
from USRP can happen at highest data rates no matter how many tricks you
use with your network card (I have experience with N200/N210).
The loss of part of the signal results with synchronization loss in data
transmis
W dniu 28.02.2014 15:31, zhenhua han pisze:
> Hi,
>
> As I have known, GSM uses GMSK modulation which BT = 0.3 and it
> uses Viterbi algorithm for demodulation. And I took a look at the code
> of GMSK demod code in GNU Radio, it use quadrature_demod but not
> Viterbi as demodulation method. So whic
W dniu 28.02.2014 15:31, zhenhua han pisze:
> Hi,
>
> As I have known, GSM uses GMSK modulation which BT = 0.3 and it
> uses Viterbi algorithm for demodulation. And I took a look at the code
> of GMSK demod code in GNU Radio, it use quadrature_demod but not
> Viterbi as demodulation method. So whic
> Hi Perper,
>
> I took a look at your code, and I found this
>
> //set_frequency(d_freq_offset);
>
> It seems you have turned off the the frequency offset correction as
> you said.
> Do you know the reason of the introduced instability by this part?
>
> Best,
W dniu 23.02.2014 17:12, Martin Braun pisze:
> On 02/23/2014 09:39 AM, Sriram Damodharan wrote:
>> I am currently working on a proof of concept system, and for which, I
>> am using a patched version of airprobe, for GSM reception, using
>> GNURadio.
>>
>> I want to contribute along side to the main
W dniu 07.03.2014 06:06, zhenhua han pisze:
>
> 2014-03-04 21:55 GMT+08:00 Perper mailto:per...@o2.pl>>:
>
> > Hi Perper,
> >
> > I took a look at your code, and I found this
> >
> > //set_frequency(d_freq_offset);
> >
>
Hi all,
I want to use message passing blocks for operations where strict
synchronization is not necessary. However in flowgraphs using message
passing with "Run to completion" option turned on the program doesn't
exit on last processed sample. Is this a bug?
I want to use message passing in my pr
Hi all,
The system configuration proposed by Dushyant with encryption after
channel coding can work in case of stream ciphers. This is how it is
done in GSM. But encryption GSM is a very bad example of application of
cryptography. Channel coding will add some known relations between
information bi
Hi all,
In many applications very good synchronization of carrier and sampling
frequencies is required.
Available sources of signal not always have good clock reference. One of
the examples is cheap RTL SDR receiver based on a DVB-T dongle.
Without any additional effort to correct frequency offset
Hi all,
I've noticed that "Run to completion" works now in situation when
message passing is used, which is great!
I have a related question. I'm creating a block which uses message
passing, and run it once:
tb = some_block(fname="file1")
tb.start()
tb.wait()
#at this mom
W dniu 08.08.2014 o 11:53, 奕佑 pisze:
> Hello,
>
> I have the same problem before. After adding the virtual function in
> include directory and other are done.
>
> You need to "make clean" and after that you just make and make
> install. The "AttributeError: 'module' object has no attribute" will
>
W dniu 08.08.2014 o 15:25, Tom Rondeau pisze:
> On Fri, Aug 8, 2014 at 6:22 AM, Perper <mailto:per...@o2.pl>> wrote:
>
> W dniu 08.08.2014 o 11:53, 奕佑 pisze:
> > Hello,
> >
> > I have the same problem before. After adding the virtual function in
Hello all,
I was reading the c++ code of FM demodulators in gnuradio and I
encountered this in fmdet_cf_impl.cc:109:
-
Sdot = d_scl * (-S0+d_8*S1-d_8*S1+S4);
-
I don't know according to what principle this demodulato
14 matches
Mail list logo
