Hi：
I've been doing the same things recently. But I wonder if there is a
bbn_80211 usrp2 version? I know this object from its official
website:https://www.cgran.org/wiki/BBN80211. And I don't see anything about
usrp1 version or usrp2 version.
So confused about this, looking forward to yo
Hi：
I've been doing the same things recently. But I wonder if there is a
bbn_80211 usrp2 version? I know this object from its official
website:https://www.cgran.org/wiki/BBN80211. And I don't see anything about
usrp1 version or usrp2 version.
So confused about this, looking forward to yo
We've had a full day operating with the CloudFlare CDN for gnuradio.org.
This hasn't been long enough for the new DNS IP addresses to propagate
everywhere but we're seeing most of our non-spider traffic coming through
the CDN now.
The statistics from CloudFlare show that, for non web-crawler traff
gnuradio maint branch, v.3.6.4.1
'make test' fails, due to gr-core-test-all failing.
At first, I was getting an error due to the "shmat (2)" line above where this
error occurs, but it has settled on (3).
I added a couple lines of extra debug output (source code is below the error
output).
test
On Tue, Apr 16, 2013 at 4:22 PM, Alexandru Csete wrote:
> On Mon, Apr 15, 2013 at 7:34 PM, Johnathan Corgan
> wrote:
>> On Mon, Apr 15, 2013 at 8:40 AM, Alexandru Csete wrote:
>>
>>> As far as I can see libgnuradio-pmt is a new library and it does not
>>> have it's own package, so I assume a -lg
On 17/04/13 20:34, ikjtel wrote:
There was recently an article in QEX (ARRL's print mag for
experimenters) about building one's own VNA using an SDR.Don't
have the exact issue in hand, but should be locatable by doing a
search for "QEX vector network analyzer"
Best Regards
Max
On Wed, Apr 17, 2013 at 6:30 AM, Karan Talasila wrote:
> Hi,
>
>
> I am trying to understand ofdm demodulation using schmidl and cox paper.
> Can anybody explain how a pn sequence on even frequencies and 0 on odd
> frequencies help in the estimation of timing and frequency offset.
>
>
Hi Karan,
There was recently an article in QEX (ARRL's print mag for experimenters) about
building one's own VNA using an SDR. Don't have the exact issue in hand, but
should be locatable by doing a search for "QEX vector network analyzer"
Best Regards
Max
_
Hi,
OK, I already feared smth. like that, after the announcement of the new
cloud servers :) Your dns entry is just fine, this way it works. Thanks a
lot!
Ralph, dk5ras.
From: Johnathan Corgan [mailto:johnat...@corganlabs.com]
Sent: Wednesday, 17 April, 2013 19:18
To: Ralph A. Schm
I wasn't sure it was worth filing a bug report because it's a 1-char
documentation bug, but as you can see it's critical to the context:
diff --git a/gr-blocks/include/blocks/repack_bits_bb.h
b/gr-blocks/include/blocks/repack_bits_bb.h
index 268e4ee..f33d4bd 100644
--- a/gr-blocks/include/bloc
On Wed, Apr 17, 2013 at 02:09:26PM -0400, Sean Nowlan wrote:
> Just thinking out loud: could this be worked into the tagged_stream_block
> class? If mtu is left as a default, behavior will be identical to the way it's
> defined now and work() will always get called with the exact number of items a
On 04/17/2013 01:52 PM, Johnathan Corgan wrote:
On Wed, Apr 17, 2013 at 8:34 AM, Martin Braun (CEL)
mailto:martin.br...@kit.edu>> wrote:
As you also point out, they work well for packetized data
transmission.
When I was working on the new OFDM blocks, I had packets in mind
on th
On Wed, Apr 17, 2013 at 9:55 AM, Monahan-Mitchell, Tim <
tmona...@qti.qualcomm.com> wrote:
> >> You don't have enough RAM ... SWIG that generates the python wrapper
> >> will generate C++ source of like 20-30Mo, which when compilin will
> >> require like > 1Go of RAM !!!
>
> Does anyone know of a
On Wed, Apr 17, 2013 at 8:34 AM, Martin Braun (CEL) wrote:
> As you also point out, they work well for packetized data transmission.
> When I was working on the new OFDM blocks, I had packets in mind on the
> same order as 802.11a packets, so buffer size was never a problem.
>
For robustness, we
On 04/17/2013 04:35 AM, Carles Fernandez wrote:
> Hi,
>
> thanks Josh for this email, it's a great source of information! Let me ask
> a couple of questions: Will GRAS be included in the GNU Radio 3.7 release?
Hey, thanks for the response. I guess I gave the wrong impression. GRAS
is definitely
On Wed, Apr 17, 2013 at 9:41 AM, Ralph A. Schmid wrote:
> ras@dk5ras:~/gnuradio$ git pull
> fatal: unable to connect to gnuradio.org:
> gnuradio.org[0: 108.162.196.111]: errno=Connection timed out
> gnuradio.org[1: 108.162.197.111]: errno=Connection timed out
>
>
> Am I the only one? :)
>
No
Hi Tom,
Thanks for that. Using nongl mode has brought my wxgui back to life as I
killed it after fumbling around with graphics drivers. For the record here
is the error I was getting:
Xlib: extension "GLX" missing on display ":0.0".
nongl mode also brings back a working persistence mode, yey! :
> Did you ever get past that? I don't think it's an issue with the ODROID-X,
> rather the kernel shipped on the Linaro image doesn't have swap support built
> in. We've been trying to build gnuradio on an odroid-x too and ran in to the
> same
> problem. The solutions appear to be corss compiling o
Hi,
Over the last 13 hours I got this:
ras@dk5ras:~/gnuradio$ git pull
fatal: unable to connect to gnuradio.org:
gnuradio.org[0: 108.162.196.111]: errno=Connection timed out
gnuradio.org[1: 108.162.197.111]: errno=Connection timed out
The server IP address is reached:
ras@dk5ras:~/gnuradio$ pi
On 04/17/2013 11:34 AM, Martin Braun (CEL) wrote:
On Wed, Apr 17, 2013 at 10:12:31AM -0400, Sean Nowlan wrote:
I want to see whether "very long" PDUs would break the new tagged
stream model implementation in recent GR versions. Let's say I want
to use tagged streams with length tags to transmit
Dear Karimkhan,
What did you want to demo? You will need some sort of DAC or USRP to
transmit data.
Sincerely,
Tommy James Tracy II
Ph.D Student
High Performance Low Power Lab
University of Virginia
Phone: 913-775-2241
On Apr 17, 2013, at 3:30 AM, karimkhan wrote:
> Can any one please
On Wed, Apr 17, 2013 at 10:12:31AM -0400, Sean Nowlan wrote:
> I want to see whether "very long" PDUs would break the new tagged
> stream model implementation in recent GR versions. Let's say I want
> to use tagged streams with length tags to transmit streams that
> would require many more samples
I want to see whether "very long" PDUs would break the new tagged stream
model implementation in recent GR versions. Let's say I want to use
tagged streams with length tags to transmit streams that would require
many more samples than a single call to work() could handle. From diving
into the s
If it isn't broken makefiles, it's broken meta-make files (whether
it's autotools, or Cmake), or broken meta-meta-makefiles.
The buck
eventually, inevitably, stops at the huminz
On 17 Apr 2013 10:03,
Philip Balister wrote:
> Heh, looks like he also addresses the problem
of the broken b
On 04/17/2013 09:51 AM, Phil Frost wrote:
> On 04/17/2013 09:45 AM, Philip Balister wrote:
>> On 04/17/2013 04:26 AM, Josh Blum wrote:
>>> Behind all of the GRAS fluff, the Theron C++ concurrency library is the
>>> real scheduler.
>>
>> I dislike projects that force you to enter an email address to
On 04/16/2013 11:10 PM, Ben Reynwar wrote:
> Hi all,
>
> This is an update to let everyone know what exciting bugs are
> available to be fixed in the bug tracker
> (http://gnuradio.org/redmine/issues).
>
> Missing -mfpu=neon in CFLAGS/CXXFLAGS when building for ARM and NEON
> is supported but not
On 04/17/2013 09:45 AM, Philip Balister wrote:
On 04/17/2013 04:26 AM, Josh Blum wrote:
Behind all of the GRAS fluff, the Theron C++ concurrency library is the
real scheduler.
>
I dislike projects that force you to enter an email address to download
the source and do not provide access to the
On 04/17/2013 04:26 AM, Josh Blum wrote:
> Behind all of the GRAS fluff, the Theron C++ concurrency library is the
> real scheduler; driving all of the work dispatching, threading, and
> synchronization. I have to give a special thanks to Ashton Mason for
> creating the Theron library. Both Theron
On Wed, Apr 17, 2013 at 9:22 AM, Sajjad Safdar
wrote:
> Hi,
> I upgraded from ubuntu 12.04 to 12.10. Then installed gnuradio again becoz
> after update it was not orking. When i upgraded i had issues with the unity,
> then i corrected it. Then installed gnuradio. I ran the gnuradio flow graph
> wh
Hi GR admins -
When one of you gets a chance, could you please approve my wiki/tracker
account if it isn't already? Thanks!
Sean Nowlan
sean.nowlan -at- gtri.gatech.edu
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Hi,
I upgraded from ubuntu 12.04 to 12.10. Then installed gnuradio again becoz
after update it was not orking. When i upgraded i had issues with the unity,
then i corrected it. Then installed gnuradio. I ran the gnuradio flow graph
which i created for NBFM reciever. The output of the FFT is not
Since you mentioned this, the code in gr-digital performs channel estimation
base on known pilots. It is in the
./gr-digital/lib/digital_ofdm_frame_acquisition.cc
Channel estimation is based on preamble which contains known pilots each second
carrier. Therefore the unknown carrier channel esti
>A 2D-Wiener filter is the best solution in the MMSE sense, but
>time-variant
>and depends on the current SNR. A good suboptimal solution might be 2D
>interpolation
>based on a precalculated (Wiener-) filter given the pilot positions and
>some reasonable
>assumptions on the time/frequency correlati
Hi,
I am trying to understand ofdm demodulation using schmidl and cox paper.
Can anybody explain how a pn sequence on even frequencies and 0 on odd
frequencies help in the estimation of timing and frequency offset.
--
Regards
Karan Talasila
___
Discus
I am trying to implement ofdm using grc blocks. I am getting an error in
insert preamble block saying
TypeError: in method 'ofdm_insert_preamble', argument 2 of type
'std::vector< std::vector< gr_complex,std::allocator< gr_complex >
>,std::allocator< std::vector< gr_complex,std::allocator< gr_comp
Hi,
thanks Josh for this email, it's a great source of information! Let me ask
a couple of questions: Will GRAS be included in the GNU Radio 3.7 release?
Will users be able to select what scheduler they want to use (the current
one or GRAS), or is GRAS going to replace the current scheduler?
Best
Hi Dingwen,
On 04/17/2013 10:38 AM, Dingwen Yuan wrote:
Now the grc examples work with no error. The crash of the system during
gnuradio compilation is due to the boost version (the version 1.46
causes the problem). After I switched to version 1.48, the compilation
of the current gnuradio from t
Something obvious (although you might not actually want it :) is a 2D
equalizer and higher modulation schemes.
MB
sorry,but i didn't understand..why an equalizer?ofdm don't requeire
it,is it?
The equalization step is easy - the hard part is channel estimation
given a
certain set of pilot symb
Hi Bastian,
Now the grc examples work with no error. The crash of the system during
gnuradio compilation is due to the boost version (the version 1.46 causes
the problem). After I switched to version 1.48, the compilation of the
current gnuradio from the git repository works all right.
Regards,
Hey folks,
I have been working on a new scheduler for GNU Radio, called the GNU
Radio Advanced Scheduler (GRAS). GRAS is a complete re-write and
overhaul of the stock GNU Radio scheduler to implement new features,
performance enhancements, and a simplified user API. A new buffer and
threading mode
Hi all,
I'm still alive,don' t worry. Im reading more about 802.11.
About 802.11a/g: i thing that the best thing is write few block with a lot of
code inside,bacause gnu radio is stream oriented,while these wifi protocol
don't have a stream conception,but rather a structure frame(for istsance we
Hi Marcelo!
Nice to see you're interested in this project.
I recommend you discuss the detailed questions with the mentor for this
project, Edmar Gurjao (is there a reason Brazilian people like network
analyzers? *g* ).
Also, in order to write a good proposal, you should probably have a look
at G
Can any one please give me link to example which show signal transmission using
grc?
I dont have usrp. I want to show demo for transmitting signal in multiple
channel as per selection.
Please someone help!
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