Hi all,
I'm working on a system with packet headers. I want to use the message
decoded by the Packet Header Parser to update a variable.
I knew the message can be stored in a message debug block, and be retrieved
by using the get_message function. So I can define a get function to read
the
Hi all,
I'm working on a system with trellis coding and I met a problem with the
python callback function generated by grc . Because there are several
parameters used in the blocks needs to be updated. I added callback
functions for those parameters in those c++ files.
For example, to add
Dear all,
I have a question related to the constellation objects in gr-digital. After
checking the constellation.cc, I found the constellation of 8PSK and QPSK
class are all Grey coded. Now I want to use a 8PSK constellation with
natural mapping.
I know I can just modify the constellation
Does anyone have any information on the performance - specifically the
implementation loss of the Gnuradio PSK demodulator block? I am trying to
work out a link budget. Typically this would be 1dB or so from ideal.
Mike
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Hello Sara,
this is very strange. It looks like there's an extra module (that you
shouldn't be rebuilding, anyway) which tries to find an old version of GNU
Radio. Can you tell us which module that is?
You should realize what your doing here: you download the build-gnuradio
script anew, and then
On 05/03/2014 09:35 AM, Mike Willis wrote:
Does anyone have any information on the performance – specifically the
implementation loss of the Gnuradio PSK demodulator block? I am trying
to work out a link budget. Typically this would be 1dB or so from ideal.
By ideal, you mean the theoretical
On 05/03/2014 10:35 AM, Marcus Müller wrote:
Hello Sara,
this is very strange. It looks like there's an extra module (that you
shouldn't be rebuilding, anyway) which tries to find an old version of
GNU Radio. Can you tell us which module that is?
Looks like it's grextras. You don't need that.
Hi Mike!
Well, from a purely algorithmic point of view, there is no approximate
magic happening inside the PSK demapper
(from constellation.cc):
unsigned int
constellation_psk::get_sector(const gr_complex *sample)
{
float phase = arg(*sample);
float width = M_TWOPI /
Hi all,
I install the gr-air modes. And the hardware I am using is USRP N210
without GPSDO. The command I am using is the default command of the
modes_rx module. And after I run this module, I got the following Results:
(-47 32.32056722) No handler for message type 24 from 739803
(-48
On 05/03/2014 12:21 AM, Sara Chérif wrote:
I am installing GNU radio using this command
wget http://www.sbrac.org/files/build-gnuradio chmod a+x
./build-gnuradio ./build-gnuradio --verbose
But I found at the end of the installation an error (after 2 hours
from beginning of installation
Do you get the GPS location of the air plane? Or do you get it before?
If it is not the radio or antenna, maybe the environment matters? I didn't
do any experiments in a totally open area, so I don't know whether it works
under that scenario. If we can decoding the signal in environment, I think
It looks like CGRAN is down for some reason. The machine that hosts it is
still up and I haven't found the cause of the problem yet. Still digging.
- George
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Something must have been upgraded on the machine, and a significant number
of the dependencies needed to run Trac have disappeared. For example,
python has disappeared from the machine :P
This might take a while, sorry.
On Sat, May 3, 2014 at 1:15 PM, George Nychis gnyc...@gmail.com wrote:
Zhe,
there are way too many changes in this diff file for anyone to track and
debug.
I suggest you start with a clean gr-trellis and change JUST one block (say
the viterbi_combined)
and see if this change propagates in python and grc as you expect.
You can also post this change to the list for
Part of this question has been partially discussed, as below.
On Mon, Mar 10, 2014 at 9:18 PM, Martin Braun martin.br...@ettus.comwrote:
OK, I admit I was unclear. Let's try from scratch:
- The return function from work() or general_work() is the amount of
items that were *produced*.
Says,
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