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
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
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
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 tianxia
To: tianxia...@hotmail.com
CC: discuss-gnuradio@gnu.org
2011/9/12 intermilan tianxia...@hotmail.com
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
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
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
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 tianxia...@hotmail.com
Hi:
I recently add a new block to the GNURadio and GRC.The
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 there is
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 receive pi/4
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 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
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
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
, 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 happen.
Not without seeing your code. Most often
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
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
-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 is used to
measure the snr of the bpsk or qpsk signals. But I
do not know how to use
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:
Hi all:
I found these is a block gr_probe_mpsk_snr in the grc
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
...
Achilleas
On 4/1/2011 4:33 AM, intermilan wrote:
hi Achilleas:
I recently had read the code in the trellis_viterbi_combined_fb.cc want
to understand how you use the viterbi algorithm.But there is something
that I can not understand.
for(int k=0;kK;k++) {
calc_metric(O, D, TABLE
was going to do this I wouldn't try to do it in GRC, but it is
probably possible.
Ben
2011/3/11 intermilan tianxia...@hotmail.com:
Ben:
Thanks for your reply.I knew that block you mentioned.And I know if I
use the block chunks_to_symbols after the trellis_encoder,that parameter
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
:45 AM, intermilan wrote:
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
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
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 intermilan tianxia...@hotmail.com:
Hi all:
Now I want
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
make
make check
sudo make install
Then I thought I
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
, 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
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
/devtools
greetings
thilo
2010/11/9 intermilan tianxia...@hotmail.com:
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
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'
/17 intermilan tianxia...@hotmail.com:
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
/gnuradio-core/src/python/gnuradio/blks2impl
?
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
2010/9/15 intermilan tianxia
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
: [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 can anyone tell me
how this value come out and where can
...@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
e-mail.But there is no answer for it.I still can not find
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?
: [Discuss-gnuradio] what does the corresponds to DC in the
IFmean?
From: jasonu...@gmail.com
To: tianxia...@hotmail.com; discuss-gnuradio@gnu.org
2010/8/5 intermilan tianxia...@hotmail.com:
hi all:
I recently see the corresponds to DC in the IF in the function
set_freq
.
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 quertion.why the value
is 4M? why
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.
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:
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
after I run the test_usrp_standard_tx.cc, I got the follow
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_ptrusrp_standard_tx, long
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 /
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
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
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
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