nuradio@gnu.org
http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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Dr. Thomas Hobiger
Space-Time Measurement Project
Space-Time Standards Group
New Generation Network Research Center
National Institute of Information and Commu
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Dr. Thomas Hobiger
Space-Time Measurement Project
Space-Time Standards Group
New Generation Network Research Center
National Institute of Information and Communications Technology
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4-2-1 Nukui-Kitamachi, Koganei
184-8
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Dr. Thomas Hobiger
Space-Time Measurement Project
Space-Time Standards Group
New Generation Network Research Center
National Institute of Information and Communications Technology
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4-2-1 Nukui-Kitamachi, Koganei
184-8795
****
Dr. Thomas Hobiger
Space-Time Measurement Project
Space-Time Standards Group
New Generation Network Research Center
National Institute of Information and Communications Technology
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4-2-1 Nukui-Kita
Hi Josh,
Thanks for the reply. I am using a MIMO cable between both URSP2s, so I
thought that they sync automatically.
I am not feeding a PPS to both devices, as I only need to run both
synchronously, but I don't need to sync them to outside references.
Thomas
- Original Message -
> F
ace
-Josh
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Dr. Thomas Hobiger
Space-Time Measurement Project
Space-Time Standards Group
New Generation Network Research Center
National Institute of Information and Communications Technology
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4-2-1 Nukui-Kitamach
Hi,
Thanks for the prompt response. I am out of office today, and will
reconfirm the steps below tomorrow.
> Make sure you dont have any old libuhd.so
I will double check.
> You said it crashed on import: Run python in gdb and see what it spits
out.
>
> gdb python
> run -c "from gnuradio imp
BTW, I am using Fedora 13 (64bit).
Regards,
Thomas
- Original Message -
> Its most likely the result of an ABI change. Are you sure everything
is
> rebuilt? Any lingering library files either with gnuradio or uhd? -
Josh
>
> On 11/22/2010 02:13 AM, Thomas Hobiger wrote:
?
Regards,
Thomas
On 11/22/2010 03:50 PM, Thomas Hobiger wrote:
Hi,
Thanks for this hint. I seems I had to update my repo to get the
latest source which provides provides the ref clock switch.
Sorry for taking your time and thanks for the help.
Thomas
On 11/22/2010 03:04 PM, Josh Blum wrote:
http
/gen_uhd_single_usrp_blocks_xml.py?h=next&id=d74eacddbb8875479fef1d9ca75f36fca78df792#n33
On 11/21/2010 09:59 PM, Thomas Hobiger wrote:
Hi,
The capability is already there. If you need an example, take a look
at the generated python code when you enable the ref clock for the uhd
source or sink b
o the code.
Regards,
Thomas
--
**
Dr. Thomas Hobiger
Space-Time Measurement Project
Space-Time Standards Group
New Generation Network Research Center
National Institute of Information and Communications Techn
iscuss-gnuradio
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******
Dr. Thomas Hobiger
Space-Time Measurement Project
Space-Time Standards Group
New Generation Network Research Center
National Institute of Information and Communications Technology
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4-2-1
. These spurious
signals don't change their amplitude nor their relative position w.r.t.
the center frequency independent of which RF I choose.
Is this a problem of the DBSRX or is it related to the FPGA, firmware, etc?
Any comments highly appreciated.
Best regards,
Thomas Ho
Hi Marc,
Thanks for the code. I will give it a try tomorrow (I am out of the
office already). I intend to sample continously for 10-15 minutes to
disk, so your solution might not work directly for me, but if you agree
I'd like to modify your code. If it works as expected, I can post it
somewhe
ow can
you explain this?
Regards,
Thomas
--
******
Dr. Thomas Hobiger
Space-Time Measurement Project
Space-Time Standards Group
New Generation Network Research Center
National Institute of Information and Commun
Oops.. typo
If I read directly from /dev/urandom the whole performance goes down
as random numbers can be generated fast enough
If I read directly from /dev/urandom the whole performance goes down as
random numbers can't be generated fast enough
__
ough
Thanks,
Thomas
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******
Dr. Thomas Hobiger
Space-Time Measurement Project
Space-Time Standards Group
New Generation Network Research Center
National Institute of Information a
is there a ring/circular buffer in GNU radio which I can use before
writing the data to disc?
Best regards,
Thomas Hobiger
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******
Dr. Thomas Hobiger
Space-Time Measurement Project
Space-Time Standards Group
New Generation Netw
ted
in a quite fast mode (I have benchmarked the I/O giving me much more
bandwidth than what streams in from the USRP2).
I have started to modify parts of the GNURADIO code, but changing buffer
sizes does not help much.
Is there anybody who experienced similar troubles?
Regar
is critical that both devices are well
synchronized, otherwise I would see an artificial Doppler shift/rate,
between the two data streams...
Best regards,
Thomas Hobiger
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Dr. Thomas Hobiger
Space-Time Measurement Project
rest on the GPU we should be able to speed up things.
Anyway, thanks.
Thomas
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**
Dr. Thomas Hobiger
Space-Time Measurement Project
Space-Time Standards Group
New Generation Network Research Center
National Institute of
tuff.
As this is an active antenna, I hope the power it up via the DBSRX as
the spec say "The DBSRX is MIMO capable, and can power an active antenna
via the coax."
Regards,
Thomas
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******
Dr. Thomas Hobiger
Space-Time
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**
Dr. Thomas Hobiger
Space-Time Measurement Project
Space-Time Standards Group
New Generation Network Research Center
National Institute of Information and Communications Technology
(DLL,
PLL) lost lock or does it only prevent to extract the navigation bits?
Best regards,
Thomas Hobiger
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**
Dr. Thomas Hobiger
Space-Time Measurement Project
Space-Time Standards Group
New Generation Network Research C
Hi Juha,
Gnuradio uses FFTW, which as a pretty nice benchmark page [1]. If we
look at the results for a fairly new intel processor, we see that a
262144 point FFT can be computed with about 9 GFLOPS speed, which
means that a 262144 point FFT should be done in less than 3 ms.
[1] http://www.fftw.
ing for is something larger than 16K FFT points.
Maybe someone has experiences with such large FFTs and how they perform
(Flops or FFTs per second)?
Best regards,
Thomas Hobiger
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Dr. Thomas Hobiger
Space-Time Measurement Project
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