Hi
I am trying to use two USRPN210 to transmit using 2 transmit antennas for
MIMO,. I have successfully constructed a receiver using 2 USRPs with
Reciever MIMO with 2 reciever antennas having a daughter board XCVR2450
using the freely available file multi_sampler.cpp .. I have been able to
reci
Matt,
My area of research is DSP and massive parallelism. Given the structure of GNU
Radio, it is possible to know what data is required upfront. This opens up the
possibility of a performance boost. I know how GNURadio works, it was
discussed earlier when I raised this question.
There is a
Hi Marco,
I tested it and I got it working http://www.poes-weather.com/rtl-sdr/
Patrik
-Original Message-
From: 2_...@libero.it <2_...@libero.it>
Reply-to: "2_...@libero.it" <2_...@libero.it>
To: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] NOAA antenna
Date: Thu, 16 May 2013
Are you saying that it is better to always make copies of the data rather
than just make copies when you need them?
In any case, I think you misunderstand both how GNU Radio works and how UHD
interacts with it. UHD provides a single copy of data to GNU Radio for
two reasons -- first, that is the
There is a performance issue with this. If your program needs to manipulate
the raw data, but at the same time provide that raw data to another branch(es),
a copy much be made. If this is the case, then it would make more sense to
duplicate the data in parallel as it enters the system. This s
On 16 May 2013 23:51, Matt Ettus wrote:
> There is no need to
create multiple copies. The consuming blocks are each given a pointer to
the same data, and the memory is not freed until all the consuming
blocks indicate they are done with it.
>
> Matt
Also, the "contract"
that work functions
There is no need to create multiple copies. The consuming blocks are each
given a pointer to the same data, and the memory is not freed until all the
consuming blocks indicate they are done with it.
Matt
On Thu, May 16, 2013 at 11:00 AM, Mark McCarron wrote:
> I am wondering if the UHD driver
Marcus,
I have tested this under the Ubuntu LiveUSB on a couple of machine and
the same problem occurs every time.
Regards,
Mark McCarron
The problem stems from the fact that too much of the internal machinery
in the wxGUI graphical sinks are computed in Python.
For long FFTs, and even mod
Can't find this info anywhere, does anyone know the format for the
'labels' section of this control?
Regards,
Mark McCarron
The parameters within GRC are all required to be Python objects of some
sort. In this, it takes a Python "list" of strings:
["A", "B", "C", "D", "E"]
--
Marcus Leec
Thank you for that information. R Lyons' books are just what I was looking
for.
On Thu, May 16, 2013 at 3:00 PM, Martin Braun (CEL) wrote:
> On Thu, May 16, 2013 at 01:46:40PM -0700, Marc Newlin wrote:
> > I'm looking for recommended reading to better by understanding of DSP.
> I'm
> > nearing th
On 16/05/13 22:56, Mark McCarron wrote:
Can't find this info anywhere, does anyone know the format for the
'labels' section of this control?
They are strings. Something like:
["LABEL-1","LABEL-B","LABEL-3"]
Iain
___
Discuss-gnuradio mailing list
D
On Thu, May 16, 2013 at 01:46:40PM -0700, Marc Newlin wrote:
> I'm looking for recommended reading to better by understanding of DSP. I'm
> nearing the end of The Scientist and Engineer's Guide to Digital Signal
> Processing, and have found it to be an excellent resource on the fundamentals.
> I'm
Can't find this info anywhere, does anyone know the format for the 'labels'
section of this control?
Regards,
Mark McCarron ___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/lis
On Wed, May 15, 2013 at 7:01 PM, Tom Rondeau wrote:
> On Wed, May 15, 2013 at 9:42 AM, Alexandru Csete wrote:
>> Greetings,
>>
>> Today, we can configure gr-ctrlport to use a specific port. Doing so
>> leads to a problem when trying to execute more than one gnuradio
>> application even if they ar
Hello,
I'm looking for recommended reading to better by understanding of DSP. I'm
nearing the end of *The Scientist and Engineer's Guide to Digital Signal
Processing*, and have found it to be an excellent resource on the
fundamentals. I'm hoping to follow it up with a book or two to with a
deeper
The minutes are up on the wiki.
Next time, we'll stream the call so that people who just want to listen
in can do that without requiring a slot in the call.
Cheers,
MB
On Thu, May 16, 2013 at 10:53:33AM -0700, Ben Reynwar wrote:
> Looks like we get an increase to a 15 person limit if the person
Marcus,
I have tested this under the Ubuntu LiveUSB on a couple of machine and the same
problem occurs every time.
Regards,
Mark McCarron
Date: Thu, 16 May 2013 13:48:01 -0400
From: mle...@ripnet.com
To: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] WX GUI FFT Sink Performance
I am wondering if the UHD driver has the ability to create multiple
copies of the stream in memory???
Let's say I have a flow-graph that has two branches, the first pushes
complex data to an FFT, whereas the second demodulates a portion of
that data into AM.
Does the driver supply a single s
I don't really care which GUI framework is used, just that it works.
Regards,
Mark McCarron
Date: Thu, 16 May 2013 13:56:51 -0400
Subject: Re: [Discuss-gnuradio] WX GUI FFT Sink Performance
From: hilbert3...@gmail.com
To: mark.mccar...@live.co.uk
CC: discuss-gnuradio@gnu.org
One of the beauties
And since we are all very lazy:
for (( i=1; i <= 34; i++ )); do wget "www.dspguide.com/CH${i}.PDF"; done
On May 16, 2013, at 8:31 AM, Michael Dickens wrote:
> Not sure if this has been mentioned here before, and it cannot hurt to
> mention it again. The book "The Scientist and Engineer's Guid
I am wondering if the UHD driver has the ability to create multiple copies of
the stream in memory???
Let's say I have a flow-graph that has two branches, the first pushes complex
data to an FFT, whereas the second demodulates a portion of that data into AM.
Does the driver supply a single stre
One of the beauties of open-source software is that if you don't like the
way something works, or think it should be
enhanced, you can take care of that yourself, and, hopefully, share the
results with the community.
If you don't have the necessary skils to do so, then you make your desires
know
Looks like we get an increase to a 15 person limit if the person who
starts the hangout is using a google apps account.
http://googleenterprise.blogspot.com/2012/11/larger-hangouts-in-google-for.html
On Thu, May 16, 2013 at 6:08 AM, Martin Braun (CEL)
wrote:
> Quick reminder... if you want to jo
On 05/16/2013 01:36 PM, Mark McCarron wrote:
Marcus,
Accurate output is great when doing analysis, but if you just want to
create a quick interface that will allow you to see a little more
detail, then overlapping or duplicating the stream is fine. The error
in the output is always within a
Marcus,
Accurate output is great when doing analysis, but if you just want to create a
quick interface that will allow you to see a little more detail, then
overlapping or duplicating the stream is fine. The error in the output is
always within a given tolerance and that can be suitable for a
On 05/16/2013 12:41 PM, Mark McCarron wrote:
Marcus,
Thanks for highlighting the limitations of the current
implementation. It explains a lot. Personally, I would like to see a
little more emphasis on useful GUI elements, not just accurate GUI
elements.
So, you'd rather see fast updates of
Marcus,
Thanks for highlighting the limitations of the current implementation. It
explains a lot. Personally, I would like to see a little more emphasis on
useful GUI elements, not just accurate GUI elements.
In regards to the WX GUI FFT window not responding. I have tested it with a
very
Seems to me that Lyon's book is only available from file sharing servers
which seems to me to be a copyright violation. Even his blog page
(http://www.dsprelated.com/blogs-1/nf/Rick_Lyons.php) sends you to sites to
purchase from.
But I did find some other free online resources:
http://dspguru.com/
What is the link to Lyon's book?
Evan Merewether - 575-640-5582
I don't have it off the top of my head, but I'm sure Google knows...
--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
___
Discuss-
Marcus,
Thanks, that would explain the slow updates that I was seeing.
Perhaps an overlapped FFT would be useful for interactive scenarios.
Has one been implemented?
I think they're implementing an overlapped-FFT option for the QtGUI
sinks for "next". Not sure. The thing about overlapped d
What is the link to Lyon's book?
Evan Merewether - 575-640-5582
-Original Message-
From: discuss-gnuradio-bounces+evan=syndetix@gnu.org
[mailto:discuss-gnuradio-bounces+evan=syndetix@gnu.org] On Behalf Of
Marcus D. Leech
Sent: Thursday, May 16, 2013 9:36 AM
To: discuss-gnuradio
Marcus,
Thanks, that would explain the slow updates that I was seeing. Perhaps an
overlapped FFT would be useful for interactive scenarios. Has one been
implemented?
This, however, does not explain why my windows are not responding. After about
8 seconds, the window turns to grey and the GU
Not sure if this has been mentioned here before, and it cannot hurt to mention it again. The book
"The Scientist and Engineer's Guide to Digital Signal Processing" by "Steven W. Smith,
Ph.D." is available online as PDFs for free here< http://www.dspguide.com/pdfbook.htm>; you
have to download
Not sure if this has been mentioned here before, and it cannot hurt to mention
it again. The book "The Scientist and Engineer's Guide to Digital Signal
Processing" by "Steven W. Smith, Ph.D." is available online as PDFs for free
here < http://www.dspguide.com/pdfbook.htm >; you have to download
The ability to set your own axis-labelling function for the FFT display
would be useful for certain types of applications where the frequency is
actually
interpreted as something else--like doppler shift, for example.
I'm thinking that you could pass a function that takes the generated
list
Thank you guys for yours responses.
@Coppens: you have a nice websites (:
Just one thing: I must found another e-shop, because my favourite(tayda)
doesn't have all component..
@Tast: In your opinion, could your antenna work with ezcap tuner without pre-
amp?
By,
Marco Ribero
__
Marcus,
Sorry for the late reply on this, I've been upgrading my hardware and
I'm just catching up. Here is my issue, in Spectrum lab if I provide
a FFT Input length of 65536 on a 192Ksps stream, I get the following
characteristics:
Effect of FFT settings with fs= 192.000 kHz:
Width of one
Nemanja,
first note that we're in the middle of moving to 3.7.
So things will definitely be out of sync.
However, those two docs describe two different things:
On Thu, May 16, 2013 at 01:30:43PM +0200, Nemanja Savic wrote:
> In the following link:
> http://gnuradio.org/redmine/projects/gnuradio/
Quick reminder... if you want to join the dev call, make sure you have
the plugin installed, your mic works (and doesn't echo), and you're in
IRC by 1700 UTC to make sure you don't miss anything.
MB
On Mon, May 13, 2013 at 12:57:19PM +0200, Martin Braun (CEL) wrote:
> This Thursday, May 16, we wi
Hi Everyone
I am trying to 2 x 2 MIMO using USRPN210.. Until now I
have successfully constructed a receiver using 2 USRPs having a daughter
board RFX2400 using the freely available file multi_sampler.cpp .. I have
been able to recieve the signals synchronously with zero phase off
Hi all guys,
I have just been reading instructions for makin new fashion signal
processing block, and I have a certain doubt:
In the following link:
http://gnuradio.org/redmine/projects/gnuradio/wiki/BlocksCodingGuide
you can see for example this in public header file:
namespace gr {
namespac
Hi Alex,
On Wed, May 15, 2013 at 12:13:16PM -0500, Alex Zhang wrote:
> It is excited to see the new OFDM implementation has been merged and test in
> the GNURadio master branch. Several Questions:
>
> 1. What are the main changes from the old design?
The biggest differences are the increased mod
Marcus,
I have run some tests and it looks like the WX GUI FFT Sink stops responding
with any settings above 4096@15 FPS.
I've upgrade my video card drivers and they work fine with everything else.
Processor usage is fine, nothing in the event logs.
Regards,
Mark McCarron
From: mark.mccar..
On 05/16/2013 02:38 AM, Dominique Guelord Ingala wrote:
> Hi, I need to allign the LOs for SBX boards. I read the application
> notes on UHD-Synchronization.
>
>
> http://files.ettus.com/uhd_docs/manual/html/sync.html#align-los-in-the-front-end-sbx-wbx-n-series
>
> I've been working on this fo
Hi, I need to allign the LOs for SBX boards. I read the application notes on
UHD-Synchronization.
http://files.ettus.com/uhd_docs/manual/html/sync.html#align-los-in-the-front-end-sbx-wbx-n-series
I've been working on this for a while, but I'm still confused a bit. Please
what is the directory
I want to send one ofdm symbol then mute during one symbol, and loop in that
way.
I have tried to make the second symbol to be all 0+0j in baseband. But the
output remains
an output noise which is not as low as requied. I think the RF always output
something even
if the baseband gives him 0+0j.
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