Hi,
1- Actually I am using the followings
make(8,8,1000*sizeof(float))
make3(4,4,1000*sizeof(float),1000*sizeof(float),4*sizeof(float))
I think this should also work, shouldn't it?
2- Under the general work function I am using the followings:
const float *in1 = (const float *) input_items[0]
.
Hello Bastian,
Thanks for the quick response! I don't expect that the old csma_and_agc mod
is fresh in your mind, but appreciate any help.
strange errors. Any chances that you have another (old) installation
> somewhere on your system?
>
The long version:
No, I'm pretty sure that I don't. There
On 17/07/17 14:04, Marcus Müller wrote:
I'd resort to making sure there's nothing old in /usr/local/lib*
anymore. Basically, move every file that hasn't been created there
since the recompile to a backup location, figure out what's missing
after that, and rebuild.
Best regards,
Marcus
On
Well, the good thing about installing anything that you've compiled
manually into /usr/local/ is that you immediately know where your stuff
with outdated linking is.
Best regards,
Marcus
On 17.07.2017 19:26, John Shields wrote:
> Thank Marcuses,
>
> I will work along the
... and that's not a problem per se. Anyway, this is a syscall, and it's
unlikely that there's a problem *within* your operating system.
So, the rest of the backtrace where this is from is very likely more
relevant.
Also, poll() might indicate this is a more or less idle thread; use
`info threads
On 07/17/2017 09:28 AM, Rafik ZITOUNI wrote:
> Dear all,
>
> I have an issue that appears when I'm running gdb.
>
> I obtained the following message.
>
> 0x7fcb038c6c5d in poll () at ../sysdeps/unix/syscall-template.S:81
> 81 ../sysdeps/unix/syscall-template.S: No such file or direct
On 07/17/2017 03:20 AM, Marcus Müller wrote:
> Hi Johannes,
>
> thanks for this very short and informal bug report on your own software :)
>
> so, a bit of debugging from my side:
>
> gdb --args python2 $(which gnuradio-companion)
> (gdb) run
Cool! That's how you debug the XML code. I was wonde
On 07/17/2017 01:29 AM, Rafik ZITOUNI wrote:
> Dear Cinaed,
>
> The costas loop works only with BPSK, QPSK and 8PSK.
I forgot about that.
You can certainly see the constellation by tapping the output of the
polyphase clock. If it looks messy try reducing the output sps of
polyphase clock to 1.
Hi Jerry,
that's great! I'm glad you figured it out.
You're absolutely right, things like this can indeed drive a person crazy.
It's certainly driven me crazy a couple of times.
I've edited the wiki, it should be fixed now :)
Best regards,
Håkon Vågsether
17. jul. 2017 4.44 p.m. skrev "Jerry"
Good evening all,
I am completing a project and attempting to send a file through two separate
USRP using gnu radio.
I have managed this with File Src>Packet Encoder> GMSK Mod > USRP Sink at the
TX and USRP Src>Polyphase Clock Sync >Cost as Loop>GMSK Demod >Packet
Decoder>File Sink.
The resul
Hello GuysI have a block that I'm developing using python that will ultimately
take in a certain amount of items and as a result, do two things: send a
message to the sink block and also output a stream of 12 samples.
My question is how to exactly account for this within the forecast function??
Thank Marcuses,
I will work along the lines recommended by
Marcus M and let you know.
While I hate to think of it, I might
need to do a clean install of 16.04 LTS and start my world over - which
is sub-optimal.
Dear all,
I have an issue that appears when I'm running gdb.
I obtained the following message.
0x7fcb038c6c5d in poll () at ../sysdeps/unix/syscall-template.S:81
81 ../sysdeps/unix/syscall-template.S: No such file or directory.
Could you have any idea how to fix this issue?
Best,
--
Dear Marcus,
Thanks for your answer and the precious complementary information. I
conclude that an implementation of QAM16's costas loop is more complicated
than the existing one, i.e MPK receiver.
I am trying to reuse some existing implementation with 16QAM in order to
obtain something with my
Hi Håkon
Big thank you !!
I understand that many times “instructions” are not precisely correct and may
be missing pieces of code punctuations, grammar, etc. However, as an entry
level person to Linux – when reading a wiki page or readme file…it is exactly
these subtle missing pieces t
You'll have to try. Chances are good.
Best regards,
Marcus
On 07/17/2017 04:18 PM, Alex Homero Rivadeneira Erazo wrote:
Hi everybody,
Do you know, if it is possible to attach blocks that are available in
a recent version of gnuradio (such as 3.7.12) and include them in an
older version of
Hi everybody,
Do you know, if it is possible to attach blocks that are available in a
recent version of gnuradio (such as 3.7.12) and include them in an older
version of gnuradio (such as 3.7.9).
The blocks that I am interested are Protocol formatter (Async) and Multiply
by Tag Value blocks.
Re
I'd resort to making sure there's nothing old in /usr/local/lib*
anymore. Basically, move every file that hasn't been created there since
the recompile to a backup location, figure out what's missing after
that, and rebuild.
Best regards,
Marcus
On 07/17/2017 03:43 PM, Marcus D. Leech wrote
Hi Vipin - If you look at the linkage of the gnuradio-runtime library, you can
tell whether log4cpp was used & if it was used then you know logging was
enabled. If there is no log4cpp linkage in the gnuradio-runtime library, then
I'm not sure how you determined whether logging was enabled.
By de
Hi Jerry,
if I understand you correctly, you are trying to run the executable
"grc_setup_freedesktop"
from within its directory. This will require you to prefix the executable
with "./".
"." means your current directory, but perhaps you already knew that. :) So,
instead of:
$ sudo grc_setup_free
Hi Ali,
So, you want one block with:
* 8 inputs, itemsize0…7 = 1000*4B = 4000B
* 4 outputs, itemsize0=itemsize1=4000B, itemsize2=itemsize3=16B
Correct?
You need to generate two std::vector with content
{4000,4000,4000,4000,4000,4000,4000,4000}
and
{4000,4000,16,16}
respectively, and use
On 07/17/2017 03:41 AM, John Shields wrote:
On 17/07/17 05:53, Marcus D. Leech wrote:
On 07/17/2017 12:47 AM, John Shields wrote:
Even after I re-installed pyephem (for python 2) the
issue continues i.e. logger_tp undefined and malloc error. GRC is
sane in that I can instanti
I am just starting on in both Linux and gnuradio so steep learning curve so
far.
I successfully built installed the latest gnuradio into my Ubuntu 16.04 LTS
using PyBOMBS. All works fine from the command line.
I would like the convenience of a GRC desktop icon and I read on the
wiki.gnurad
Hi to all,
I want to design my own OOT module with the following I/O:
8 inputs (length of 1000 and each element is type of float)
2 outputs (length of 1000 and each element is type of float)
2 outputs (length of 4 and each element is type of float)
I used general type block but I could not get t
Hi,
On 07/17/2017 11:06 AM, Mériem Saïdi wrote:
Hi,
I use 802.11 IEEE standards to code and decode a PMT message and i would
like to calculate the BER between the source of information I want to
encode and the same source after decoding. (see attached screen-shots below)
Except that I have a
Hi Rafik,
I should have been a little more constructive in my last email:
It's not inherently impossible to correct phase of a QAM reception using
a costas loop – it's just that the GNU Radio costas loop block makes
assumptions that break down for 16QAM:
* The Costas loop is a phase-only cor
Ah, yeah, in that case, a power path loss of 80 dB is equivalent to an
amplitude multiplication by 10^-4.
Best regards,
Marcus
On 07/17/2017 12:17 AM, Jose Ruvalcaba wrote:
Hi Marcus,
Thanks for your response. I'm trying to make a channel simulator where
my signal going into the USRP gets a
Thanks Marcus,
So, how can I see my constellation points with 16 QAM receiver ?
Regards,
2017-07-17 12:26 GMT+02:00 Marcus Müller :
> No.
>
> That's not going to work out, mathematically.
>
> Best regards,
>
> Marcus
>
> On 07/17/2017 10:29 AM, Rafik ZITOUNI wrote:
>
> Dear Cinaed,
>
> The co
No.
That's not going to work out, mathematically.
Best regards,
Marcus
On 07/17/2017 10:29 AM, Rafik ZITOUNI wrote:
Dear Cinaed,
The costas loop works only with BPSK, QPSK and 8PSK.
Is it possible to change the actual costas loop and add the 16 QAM.
Best regards,
2017-07-14 0:46 GMT+02
Hi Johannes,
thanks for this very short and informal bug report on your own software :)
so, a bit of debugging from my side:
gdb --args python2 $(which gnuradio-companion)
(gdb) run
…
Trigger hangup by dragging POLAR config onto canvas
…
[ctrl-C]
Thread 1 "python2" received signal SIGINT, I
Hi,
I use 802.11 IEEE standards to code and decode a PMT message and i would
like to calculate the BER between the source of information I want to encode
and the same source after decoding. (see attached screen-shots below)
Except that I have all time a null BER ! however the "channel model" block
Hi List,
I created an issue for this on github [0]. I assume the bug manifested
itself due to a change in GRC.
Cheers
Johannes
[0] https://github.com/gnuradio/gnuradio/issues/1385
On 15.07.2017 04:36, Cinaed Simson wrote:
Hi Johannes - I captured the output of grcc for both polar grc file
Dear Cinaed,
The costas loop works only with BPSK, QPSK and 8PSK.
Is it possible to change the actual costas loop and add the 16 QAM.
Best regards,
2017-07-14 0:46 GMT+02:00 Cinaed Simson :
> On 07/13/2017 06:16 AM, Rafik ZITOUNI wrote:
> > Dear Cinaed,
> >
> > But how to see the constellati
On 17/07/17 05:53, Marcus D. Leech wrote:
On 07/17/2017 12:47 AM, John Shields wrote:
Even after I re-installed pyephem (for python 2) the
issue continues i.e. logger_tp undefined and malloc error. GRC is
sane in that I can instantiate a USRP source and display it's FFT.
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