after executing a GNURadio flowgraph for sometime (typically for abt
2-3mins) the code crashes and
the following message is displayed.
'''
*** glibc detected *** python: malloc(): memory corruption:
0x7f7b94002b00 ***
=== Backtrace: =
/lib/x86_64-linux-gnu/libc.so.6(+0x79d7a)[0x7f7
I am comparing the following 2 systems on GRC:
[source] --> [block A] --> [sink]
and
[source] --> [block A] -->[sink]
|___^
where [block A] is a very CPU-intensive SP block, source and sink are
very simple SP blocks,
and neither source nor sink set the sample rate, neither
On 09/21/2011 09:55 AM, Feng Andrew Ge wrote:
> Josh, thanks for the information. Where can I get those few
> implementations using stream tags?
>
If you werent following the other discussions, there is a uhd source
tagging capability implemented on this branch:
http://www.github.com/bistromath/
Hi,
This is Song, a phd student in Computing School of USM. I'm using GNUraido to
do some research in wireless channel coding. I try to extract some useful
information from trellis_viterbi and then use this information as measurement
in other functions.
Currently, I have successfully ge
Thanks a lot for the feedback. I appreciate it.
Nazmul
On Wed, Sep 21, 2011 at 2:28 PM, Tom Rondeau wrote:
> On Fri, Sep 16, 2011 at 4:46 PM, Nazmul Islam
> wrote:
>
>> Hello Tom,
>>
>> I think that both your and Wyglinski's book uses Python code based
>> examples. WINLAB has recently switche
On 09/21/2011 12:18 PM, valentac wrote:
>
> So I've been doing some development and my USRP using a custom RF front end
> via the BasicRX daughter board and have noticed an RC decay. I thought this
> was my system, but I recently just put a signal generator directly into the
> USRP and noticed t
So I've been doing some development and my USRP using a custom RF front end
via the BasicRX daughter board and have noticed an RC decay. I thought this
was my system, but I recently just put a signal generator directly into the
USRP and noticed the same thing (although not as high of a time consta
Andrea, Andrew,
You're best off reading the source code:
http://www.github.com/bistromath/gr-air-modes/
I also have a set of slides from the Gnuradio conference, but it doesn't go
into detail into the decoder itself:
http://www.nerdnetworks.org/~bistromath/adsb.pdf
PPM is pretty straightforward
On 21/09/2011 2:38 PM, Andrew Rich wrote:
What is UHd ?
Sent from my iPhone
Andrew Rich
Stands for "Universal Hardware Driver". It's the new (15 months old
now, I think) way to interface to ALL of the Ettus hardware.
Prior to UHD, there were two distinct APIs -- one for USRP1, the other
fo
What is UHd ?
Sent from my iPhone
Andrew Rich
On 22/09/2011, at 4:28, Tom Rondeau wrote:
> On Fri, Sep 16, 2011 at 4:46 PM, Nazmul Islam
> wrote:
> Hello Tom,
>
> I think that both your and Wyglinski's book uses Python code based examples.
> WINLAB has recently switched to UHD recently. UHD
Nick,
could you give me a pointer to the schema of your decoder ?
It seems to me that was available somewhere but I didn't manage to retrieve it.
Thanks in advance
*am*
-
Andrea Montefusco iw0hdvhttp://www.montefusco.com
te
On Fri, Sep 16, 2011 at 4:46 PM, Nazmul Islam wrote:
> Hello Tom,
>
> I think that both your and Wyglinski's book uses Python code based
> examples. WINLAB has recently switched to UHD recently. UHD uses C++ based
> codes for the application. Is there any book that contains GNUradio examples
> for
Awesome thanks nick
Could you talk a bit about the decode ?
Do you have sort of loop ?
Starting from a first sample ?
Sent from my iPhone
Andrew Rich
On 22/09/2011, at 4:02, Nick Foster wrote:
> Andrew,
>
> I've written a 1090MHz Mode S/ADS-B receiver for Gnuradio which can use Ettus
Andrew,
I've written a 1090MHz Mode S/ADS-B receiver for Gnuradio which can use
Ettus hardware (N200/N210, E100/E110, USRP1). It works pretty well (up to
>250nm range with line of sight). I'll try to answer your questions inline
below as well.
On Wed, Sep 21, 2011 at 9:17 AM, Andrew Rich wrote:
Josh, thanks for the information. Where can I get those few
implementations using stream tags?
Andrew
On 09/21/2011 12:31 PM, Josh Blum wrote:
On 09/21/2011 09:10 AM, Feng Andrew Ge wrote:
Josh,
I noticed that there are many useful commands enabled by UHD. For
example, they are used in uhd/
USRP N210 and SBX transceiver will give you coverage of all those bands.
Matt
On Wed, Sep 21, 2011 at 9:17 AM, Andrew Rich wrote:
> Maybe I can list my aims and you can tell me if GNU and N200 can do this ?
>
> 1. Receive on 1030 MHz - BW not sure yet
> 2. Receive on 1090 MHz - BW not sure yet
>
Maybe I can list my aims and you can tell me if GNU and N200 can do this ?
1. Receive on 1030 MHz - BW not sure yet
2. Receive on 1090 MHz - BW not sure yet
3. Receive on 2700 - 2900 MHz - BW not sure yet
4. Classify signals on these bands.
5. Perform PPM decode - Pulse Position Decode on the 109
You would need to modify the FPGA to do this. However, some other people
have done that and may have code available. Check the email archive on the
usrp-users list.
Matt
On Tue, Sep 20, 2011 at 11:21 AM, wrote:
> Hi all,
> Is it possible with GNURadio to sample at high speed, store the sample
On 21/09/2011 11:34 AM, Andrew Rich wrote:
I was just looking at the N200
Do these hardware components have sensitivity figures ?
That depends entirely on the daughterboard you chose. Although most of
them have noise figures in the 4-5dB range at maximum gain.
If you're just interested in RX
Hi Josh,
I tried the option 2) and 3), but didn't get the expected result. What I
did was transmitting some packet data which had been modulated (O-QPSK
method) from one E100 device, then observed the spectral property of the
received data from the other E100 device. However, nothing "special"
I was just looking at the N200
Do these hardware components have sensitivity figures ?
I am interested in passive RADAR
I have been using a 1090 MHz receiver and a cheap digital OSCilloscope
commaned under LINUX as a capture device.
I guess that is sort of what the hardware and software of a
Hi, All,
I am installing bbn for GNU Radio 3.3. However, it seems blks modules have
already been moved from GNU Radio 3.2 version. Any solution for me to using BBN
modules in GNU Radio 3.3?
I noticed that WIFI localization module in CGRAN server is developed based on
BBN in GNU Radio 3.2.2. S
Hi Josh,
> Thanks for the email. I went through the website you mentioned and I found
> there were benchmark_tx.py and benchmark_rx.py files in the gr-digital
> folder.
>
>
> We imaged the nodes using gnuradio-uhd-working.ndz. Using this image, we
> see the following folders when we log in to the
On Sat, Sep 17, 2011 at 3:14 PM, Martin Braun wrote:
> I'd like to point out a disadvantage to get a discussion going:
> While you're developing, this might be an inconvenience because the
> files are physically separated. Most IDEs/editors have many features
> such as tagging, switching from hea
2011/9/19 intermilan
> Hi Tom:
> I used function set_history() as you advised in mu code ,and after I
> tested many values,
> I found that the best situation is that there would be continuous Zeros
> (may be 3 or more)in my output data which made
> my data is not the exactly order which I w
On Wed, Sep 21, 2011 at 12:26 AM, Josh Blum wrote:
>
> > 1:I need to ask that is there some way to make a block using Python
> > Scientific Libraries e.g. scipy instead of writing in C++?
> >
>
> Yes, I think the best way is to make a hier block w/ message source,
> message sink and a thread. T
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