hello all:
I am a newer to the Gnuradio. And recently I use USRP and GRC
to make some examples. But I have a problem about the scope_sink in the GRC.
there are some block which I used in my graph:
signal_source->packet_encoder->Gmsk_mod->USRP_sink
hello all:
I recently use GRC and USRP to do some experiment. But there is a
problem for me.
I use signal_source->packet_encoder->Gmsk_mod->usrp_sink in the transmit
side.and it the receive side I use
usrp_source->Gmsk_demod->packet_decoder->scope_sink.Now I know I can see the
hi all:
I use the random_source in the GRC to generate the 0,1 sequence,but I do
not know the bit rate of the sequence.So can anynoe tell me the bit rate of the
sequence which is generated by the random_source?
Besides, I saw there is a pick_bitrate.py in the
/gnuradio-example/pyt
hi all:
I found there is a program (pick_bitrate.py) about bit-rate in the
/gnuradio-example/python/digital/ .And there is one quertion confuse me about
this program.
There is a formula about bit-rate in the program such as bitrate =
converter_rate / interp / samples_per_symbol.
hi all:
recently I want to run some c++ programs in the gnuradio,then I found
the test_usrp_standard_tx/rx.cc.But when I use the command g++ to compile the
program,there is lots of error.I list the error as follow:
In function `test_output(boost::shared_ptr, long long,
double, in
hi all:
I recently run the test_usrp_standard_tx/rx.cc to do some test.and after
I run the test_usrp_standard_tx.cc, I got the follow information:
which:0
interp: 64
rf_freq: 2.5e+09
amp: 3.00
nsamples: 3.2e+07
Subdevice name is Flex 2400 Tx
Subdevice freq range: (2.3e+
: tianxia...@hotmail.com
> CC: discuss-gnuradio@gnu.org
> Subject: Re: [Discuss-gnuradio] doubt about the tune()
>
> On Wed, Aug 04, 2010 at 05:08:44PM +0800, intermilan wrote:
> >
> > hi all:
> >I recently run the test_usrp_standard_tx/rx.cc to do some test.and
> >
hi all:
I recently see the "corresponds to DC in the IF" in the function
set_freq() of the db_basic.cc.so what does this sentence mean? In other word,
I want to know what is the function of the parameter baseband_freq in the
set_freq().I hope someone can help me the figure it out.
ct: Re: [Discuss-gnuradio] what does the "corresponds to DC in the
> IF"mean?
> From: jasonu...@gmail.com
> To: tianxia...@hotmail.com; discuss-gnuradio@gnu.org
>
> 2010/8/5 intermilan :
> > hi all:
> > I recently see the "corresponds to DC
.
> Date: Thu, 5 Aug 2010 19:12:12 -0700
> From: e...@comsec.com
> To: tianxia...@hotmail.com
> Subject: Re: [Discuss-gnuradio] doubt about the tune()
>
> On Thu, Aug 05, 2010 at 09:10:50AM +0800, intermilan wrote:
> >
> > Thank you for the answer.then I have another qu
Hi all:
when I run the test program test_usrp_standard_tx/rx.cc, I found that the
DC offect is set to 4M. So can anyone tell me how this value come out and where
can I find the process of setting this value? and can we set other values to
instead of this value?
gt; Subject: Re: [Discuss-gnuradio] doubt about the the DC offset
>
> On Mon, Aug 23, 2010 at 09:42:56AM +0800, intermilan wrote:
> >
> > Hi all:
>
> > when I run the test program test_usrp_standard_tx/rx.cc, I
> > found that the DC offect is set to 4M. So
: tianxia...@hotmail.com
> CC: discuss-gnuradio@gnu.org
> Subject: Re: [Discuss-gnuradio] doubt about the the DC offset
>
> On Mon, Aug 23, 2010 at 05:18:58PM +0800, intermilan wrote:
> >
> > hi Eric:
> >
> > I think I am the one who ask the same question in my last
hi all:
I want to make the symbol rate of the data which is transmited by the
USRP at the 270.833kb/s.I know the OpenBTS had already make it come true. but
what I want to know is that can I use the resampler block to make this happen?
(put the resampler block after the GMSK Mod block )a
?
thank you
> From: trondeau1...@gmail.com
> Date: Wed, 15 Sep 2010 07:43:42 -0400
> Subject: Re: [Discuss-gnuradio] want to achieve the symbol rate to 270.833kb/s
> To: tianxia...@hotmail.com
> CC: discuss-gnuradio@gnu.org
>
>
nuradio@gnu.org
>
> 2010/9/17 intermilan :
> > hi Tom:
> >
> > I can not find the examples what you asked me to look for.so what the
> > version of your Gnuradio? Mine is 3.2.2.
> > Besides, I still wonder why I can not use the resampler block in the
> &
hi all:
I am writing a new simple signal processing block following the tutorial
under the
directory /gnuradio-3.2.2/gr-howto-write-a-block-3.2.2(there is no
gr-howto-write-a-block-3.2.2 at the beginning,and this one is I downloaded and
copied to this directory)and named 'howto_add_ff' blo
ur code and you wont forget an entry
>
> check it out:
> https://www.cgran.org/browser/projects/devtools
>
> greetings
>
> thilo
>
> 2010/11/9 intermilan :
> > hi all:
> > I am writing a new simple signal processing block following the
> > tutorial under th
rite a new block
>
> On Tue, Nov 09, 2010 at 03:23:35PM +0100, Martin Braun wrote:
> > On Tue, Nov 09, 2010 at 05:33:15PM +0800, intermilan wrote:
> > > hi all:
> > > I am writing a new simple signal processing block following the
> > > tutorial
> > &
hi all:
I use the command create-gnuradio-out-of-tree-project to bulid a new
block,and after that I use the following command:
./bootstrap
./configure
make
make check
sudo make install
Then I thought I had installed the new block.then I want to import the new
b
0
>
> On Wed, Nov 17, 2010 at 10:48:11AM +0800, intermilan wrote:
> >
> > hi all:
> > I use the command create-gnuradio-out-of-tree-project to bulid a new
> > block,and after that I use the following command:
> > ./bootstrap
> > ./configure
o@gnu.org
> Subject: Re: [Discuss-gnuradio] question about import a new block in
> gnuradio-3.3.0
>
> On Wed, Nov 17, 2010 at 06:28:32PM +0800, intermilan wrote:
> >
> > Hi Eric:
> > thanks for your help. I figured the question out.
>
> What was the problem an
hi all:
Is there any block about the channel estimate? If there is a channel
estimate block ,please tell me the exactly position(under which folder). Thank
you !
___
Discuss-gnuradio mailing l
Hi all:
Now I want to use the Trellis_encoder block in the GRC to make an example
for the convolutional code.In my opinion, I use Trellis_encoder to produce the
convolutional code, then make the convolutional code through the modulator and
demodulator(such as DPSK), finally use some bloc
nuradio@gnu.org
>
> You probably want to use the trellis_viterbi_combined block.
>
> The documentation for the trellis blocks is in
> gnuradio/gr-trellis/doc/gr-trellis.xml.
> (if you have xmlto installed then an html file is also built.)
>
> Ben
>
> 2011/3/10 int
but with the
> constellation_decoder replaced with trellis_viterbi_combined. If I
> was going to do this I wouldn't try to do it in GRC, but it is
> probably possible.
>
> Ben
>
> 2011/3/11 intermilan :
> > Ben:
> > Thanks for your reply.I knew that block you mentioned.And
Achilleas:
What I want to do is want to see the BER when the convolutional code is
used in different modulator in the GRC,but I had not put the noise source in
the flow graph so there is no noise between the modulator and demodulator.
Besides,in my opinion, we can consider the packet
chunks to symbols block (identity) and the appropriate
> parameter for the metric_type.
>
>
> Achilleas
>
> On 3/14/2011 6:45 AM, intermilan wrote:
> > Achilleas:
> >
> > What I want to do is want to see the BER when the convolutional code is
> > used in differ
stance between the input
> in[k*D]...in[k*D+D-1]
> and EACH of the translated signals:
> TABLE[0]...TABLE[D-1]
> TABLE[D]...TABLE[2D-1]
> ...
> TABLE[(O-1)D]...TABLE[OD-1]
>
> Regarding references, I am just implementing the standard (block)
> Viterbi algorithm...
&
Hi all:
I found these is a block gr_probe_mpsk_snr in the grc which is used to
measure the snr of the bpsk or qpsk signals. But I
do not know how to use this block.In my flow graph, I put the bpsk modulated
data input this block,and put the output of the block to a file_sink.
But there is no
snr and probe_function?
Thank you
inter
> Date: Thu, 7 Apr 2011 11:33:23 -0500
> From: j...@joshknows.com
> To: discuss-gnuradio@gnu.org
> Subject: Re: [Discuss-gnuradio] How to use the SNR block in the GRC
>
>
>
> On 04/07/2011 05:18 AM, intermilan wrote:
> >
&g
om: j...@joshknows.com
> To: discuss-gnuradio@gnu.org
> Subject: Re: [Discuss-gnuradio] How to use the SNR block in the GRC
>
>
>
> On 04/07/2011 05:18 AM, intermilan wrote:
> >
> > Hi all:
> > I found these is a block gr_probe_mpsk_snr in the grc which i
Hi all:
When I look at the code in the receive_path.py which is under the
digital-bert folder, I found this sentence:
self._snr_probe = gr.probe_mpsk_snr_c(10.0/symbol_rate)
I think this is to set the block which measure the snr of the signal. And
after I read the code in the g
hi all:
I want to use the gr-howto-write-a-block-3.3.0 (my version of the Gnuradio
is 3.3.0)to add a new package
or a new block to the gnuradio and grc. At first I did not change anything in
the gr-howto-write-a-block-3.3.0,
so the name of the new package should be howto,and the name of the
rote:
> On Thu, Apr 14, 2011 at 04:09:01PM +0800, intermilan wrote:
> > do not know why does this error happen.
> > I did not change anything in the gr-howto-write-a-block-3.3.0. I hope
> > someone
> > can help me to fix this problem and
> > tell me why this error happ
Hi all:
I have already figured out my problem I mentioned in my last e-mail. That
is because I installed two
versions of GNU Radio in my computer.So I get the error "segmentation
fault".But there is another question.
After I uninstalled one version of GnuRadio (now i use gnuradio3.3.0),I
Hi:
I missed one thing. If I copy the gr-howto-write-a-block 3.3.0 folder to
my gnuradio folder,then after
./bootstrap, ./configure ,make, make check ,make install, the block
how.square_ff() and how.square2_ff()
can work well in my test code.Why? I just use the
create-gnuradio-out-of-tr
Does anyone know what the parameter alpha is ? I have confused about it several
days.It is a
parameter in the block gr_probe_mpsk_sbr_f. I think when we set this parameter,
the ratio for
the data signal and noise should be set in the received signal.But how do I set
this parameter?
Is there a
Hi all:
I recently write a pi/4 dqpsk modulation and demodulation block in the
gnuradio. My modulation block
works fine,but there is a question about my demodulation block.In my
demodulation block, first I compute
the angle of the input I/Q signal,then do something to the computed
angle
Hi all:
I want to use the gr_mpsk_receiver_cc block to receive the pi/4 DQPSK
signal. Because it said that
it should use for pi/4 DQPSK.But how should I set the parameter of the
block?Did anyone use it to receive
pi/4 DQPSK signal before?
hi Max:
Thank you for your help. I will look at the op25 to see if it can help me.
inter.
> Date: Thu, 12 May 2011 13:51:14 -0700
> From: ikj12...@yahoo.com
> To: discuss-gnuradio@gnu.org
> Subject: Re: [Discuss-gnuradio] how to use the gr_mpsk_receiver_cc
>
>
> > Did anyone use it to recei
Hi:
I recently used the GRC to test my Pi/4 DQPSK modulation and
demodulation block.But and my
flow graph is vector_source->packet_encoder->pi/4 dqpsk
mod->mutily_const->usrp_sink, usrp_source->
pi/4 dqpsk demod->packet_decoder->file_sink.but in my file_sink I got
nothing.It seem that th
Hi:
I recently add a new block to the GNURadio and GRC.The function of the
block is to correlate the received spread signal and the local PN code.
I think my block can work well,but there is one thing I do not know how to
fix.Sometimes the input of my block is 0 and then it will back to the
again.
Inter
From: trondeau1...@gmail.com
Date: Tue, 31 May 2011 13:54:44 -0400
To: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] help with add a new block to GNURadio
2011/5/31 intermilan
Hi:
I recently add a new block to the GNURadio and GRC.The function of the
block is to
hi Thomas:
What did you import in your python script? you should import "your
package's name", not from gnuradio import "your package's name".
Hope this is helpful.
Inter
From: thomas.h@aero.org
To: n...@ettus.com
Date: Mon, 6 Jun 2011 16:59:40 -0400
CC: discuss-gnuradio@gnu.org
Sub
Hi all:
I wrote a new block and add it into the GnuRadio. The function of this
block is to synchronize the spread signal,
which means this block used local PN sequence to correlate the input signal.
And I set the threshold, if the correlation value is
larger than the threshold, that me
: tianxia...@hotmail.com
CC: discuss-gnuradio@gnu.org
2011/9/12 intermilan
Hi all:
I wrote a new block and add it into the GnuRadio. The function of this
block is to synchronize the spread signal,
which means this block used local PN sequence to correlate the input signal.
And I set
thing
make that happen? Did you had
that before?
Inter.
From: trondeau1...@gmail.com
Date: Tue, 13 Sep 2011 09:27:28 -0400
Subject: Re: [Discuss-gnuradio] a question about using new block in GNURadio
To: tianxia...@hotmail.com
CC: discuss-gnuradio@gnu.org
2011/9/13 intermilan
Hi Tom
Hi all:
I wrote a block which is used to make a specific structure of data(like
some kind of burst).
And in this block I defined some position of the array for specific value as
structure
required. Other positions of the array will be the input data of this block(did
not do
anyt
Hi all:
What confused me is if we can do some copy operation in GNU Radio.
It means we copy the data from in[](the input data of block) to a array, and
do some operations to the data in the array, then make the operated data in
the array to be out[](the output data of block).
Did som
2011 16:32:45 +0200
From: martin.br...@kit.edu
To: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] can we do some copy operation in GNU Radio
On Mon, Oct 10, 2011 at 10:15:55PM +0800, intermilan wrote:
> Hi all:
> What confused me is if we can do some copy operation in GNU Radio
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