Hi guys,
I am trying to use gnuradio channel_model to do some simulation right now, and
I found something is not consistent in the implementation of the channel_model
C++ code. Here is my confusion:
In gnuradio-core/src/lib/hier/gr_channel_model.cc : line 57
d_timing_offset = gr_make_fractio
Are you talking about sniffing USRP data? Gnuradio doesn't have
"packets" -- it only knows about raw samples. If you're using a USRP,
UHD will packetize those samples on their way to/from the hardware; we
use the VITA 49/VRT protocol for this. You can use the VRT dissector
found here:
https:/
Twoish questions:
I've done a lot of code reading the last 2 weeks and worked on a custom PSK
modulator (basically hierarchical 2/4psk). I've tested it at baseband on
everything seems good, so I'm hoping now to use something like
benchmark{rx,tx} to test it ota.
I've built a couple of sample flow
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Hello everyone,
Does anyone know to sniff packets coming out of gnuradio? I am
spinning my wheels trying to figure this out on my own. Is there some
sort of sink that goes to an ip address or a USB port that will show
up in wiresharks interface?
Thank
Maybe I should cast arbitrary object to binary data followed by
simple_framer block and bits_to_symbols block.Is it correct?
2013/3/20 1:47, Josh Blum wrote:
Isnt all data, custom data? So the streamer interface is still just
samples, as is the gr-uhd sink's input port. If you want to send
arbit
On Thu, Mar 21, 2013 at 4:29 AM, Martin Luelf wrote:
> > Possibly Ubuntu sets up /usr/local to be regular-user
> > writeable, but that would be a horrible security flaw.
>
> At least for my Ubuntu 12.04 /usr/local is owned by root:root with 0755
> permissions and everything else would have given
Hi,
When I run benchmark_tx.py with "-discontinuous" flag ON, I notice
the following problem:
When the transmitter goes to sleep (for 1 sec), the receiver TIMEOUT (which
is fine).
But then when the txmitter wakes up and sends the next 5 packets, the receiver
consistently does not
receive th
On 03/21/2013 03:45 PM, Manu T S wrote:
I'm trying to make a block for fading channel model using hierarchical
block.
class channel(gr.hier_block2):
def __init__(self):
gr.hier_block2.__init__(self, "channel",
gr.io_signature(1, 1, gr.sizeof_float),
I'm trying to make a block for fading channel model using hierarchical
block.
class channel(gr.hier_block2):
def __init__(self):
gr.hier_block2.__init__(self, "channel",
gr.io_signature(1, 1, gr.sizeof_float),
gr.io_signature(1, 1, gr.sizeof_gr_complex)
> It's #gnuradio on freenode. I think freenode has a web client.
OK, great, I am in - using miranda, I hate webclients :)
> MB
Ralph.
___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
On 21/03/13 13:14, Tom Rondeau wrote:
On Wed, Mar 20, 2013 at 10:10 PM, Sid Boyce wrote:
On 20/03/13 23:50, Tom Rondeau wrote:
On Wed, Mar 20, 2013 at 10:58 AM, Sid Boyce
wrote:
On 20/03/13 13:08, Tom Rondeau wrote:
On Tue, Mar 19, 2013 at 9:20 PM, Sid Boyce
wrote:
I have a program that u
Just a quick reminder, the dev call will start in less than 1 hour.
Everyone is welcome; you can also just idle in #gnuradio and follow the
discussion there.
Cheers,
MB
On Wed, Mar 20, 2013 at 07:41:05AM +0100, Martin Braun (CEL) wrote:
> Hi everyone,
>
> small update: because of time zones (aa
Hello friends. One of the centers I belong to at Virginia Tech is
Wireless@VT. We run a conference every summer and we are holding it again
this summer.
http://www.wireless.vt.edu/symposium/2013/
And I know several of you are attending and we are looking forward to
hosting you.
At one time, b
On Thu, Mar 21, 2013 at 9:36 AM, wrote:
> Hello everyone,
> I am using GRC to receive digital signals. I am getting perfect audio and
> perfect scopes. I hooked up a file sink directly to the receiving device
> (RTL2832). On replaying the capture, the gui greys-out. The gui never
> greys-out
Much nicer :)
My Swiss army knife in RF is a RTL2832/E4000 stick, the Hama nano
DVB-T-Receiver.
http://dk5ras.dyndns.org/tmp/nano.jpg - unplugged after taking a look at a LTE
channel with it.
It is SMALL, it is (unlike the other cheap sticks) almost perfectly shielded,
when you unplug the M
Hello everyone,
I am using GRC to receive digital signals. I am getting perfect audio and
perfect scopes. I hooked up a file sink directly to the receiving device
(RTL2832). On replaying the capture, the gui greys-out. The gui never
greys-out when receiving live. I have the throttle after the
How about this:
http://hackaday.com/2010/02/12/spectrum-analyzer-wedged-into-a-cellphone/
:)
My wife would get a serious case of the giggles if I used a pink
spectrum analyzer.
MB
On Thu, Mar 21, 2013 at 02:23:43PM +0100, Ralph A. Schmid, dk5ras wrote:
> My wife will demand a divorce when I s
On Wed, Mar 20, 2013 at 3:06 PM, Sahoo, Anirudha
wrote:
> Hi,
>
>I am trying to implement an algorithm over the ofdm implementation
> (modifying
>
> benchmark_xx.py) so that the txmitter and rcvr can communicate changing
>
> the subcarriers dynamically.
>
>The scheme is roughly as follows:
My wife will demand a divorce when I start carrying such a pink "Hello
Kitty" device with me :) Is there a more serious looking version available?
Ralph.
http://ossmann.blogspot.com/2010/03/16-pocket-spectrum-analyzer.html
Tom
___
Dis
On Thu, Mar 21, 2013 at 2:06 AM, john jade wrote:
> Hi Marcus,
> I am not getting overflow,when i use uhd_fft. Can you please tell me what
> might be the problem.
>
> Thanks.
All uhd_fft does is connect a USRP source to an FFT sink. Problems
arise when you add more blocks to your application that
On Thu, Mar 21, 2013 at 4:55 AM, Mohammed Ramadan
wrote:
> I am transmitting and receiving using the USRP and both Leds A and C on.
> How to check that i am correctly Transmitting and Receiving. and how to see
> the Transmitted and received Signal?
>
Do you have another device that can be used t
On Wed, Mar 20, 2013 at 10:10 PM, Sid Boyce wrote:
> On 20/03/13 23:50, Tom Rondeau wrote:
>>
>> On Wed, Mar 20, 2013 at 10:58 AM, Sid Boyce
>> wrote:
>>>
>>> On 20/03/13 13:08, Tom Rondeau wrote:
On Tue, Mar 19, 2013 at 9:20 PM, Sid Boyce
wrote:
>
> I have a program that
> when i run uhd_fft it runs ok but parallel i cannot run benchmark
> so i must close the uhd_fft to run the benchmark_tx
>
> as message appears that RuntimeError: LookupError: KeyError: No devices
> found for ->
> Empty Device Address
> although while searching i find video running both togoth
when i run uhd_fft it runs ok but parallel i cannot run benchmark
so i must close the uhd_fft to run the benchmark_tx
as message appears that RuntimeError: LookupError: KeyError: No devices found
for ->
Empty Device Address
although while searching i find video running both togothers. so how
I am transmitting and receiving using the USRP and both Leds A and C on. How to
check that i am correctly Transmitting and Receiving. and how to see the
Transmitted and received Signal?
___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://
> Possibly Ubuntu sets up /usr/local to be regular-user
> writeable, but that would be a horrible security flaw.
At least for my Ubuntu 12.04 /usr/local is owned by root:root with 0755
permissions and everything else would have given me nightmares ;)
Maybe you started the script with sudo, instea
> Hi,
> How to simultaneously transmit data to usrp and also store it in a file.?
> I
> ran two separate flow graphs.But i want to have a sample rate of 25Mhz.Is
> it possible to do it.
>
> I want the same thing in receiver side also(simultaneously detect the
> packet and store the data)
>
> I am
27 matches
Mail list logo
