OHH I think because of that before starting grc I was getting several
warnings !!!
Marcus D. Leech wrote:
>
>> Hi Shiva,
>> You can have any version of Ubuntu from 8.10 onwards.But I prefer 10.04
>> LTS.
>> After installing Ubuntu just run the following script and everything will
>> be
>> done
Hi Marcus,
> What type of sample rates? What compute platform?
We are running on Ubuntu 10.10 64bit. What do you mean with type of
sample rates? Maybe USRP decimation rate? I am changing fft-size based
on this.
So for 4MHz i am using 1088 fft-size and for 2MHz i am using 544MHz
and I am getting th
On Tue, Jul 5, 2011 at 7:05 PM, Josh Blum wrote:
>
>> The device now doesn't reboot (all leds are off) and performing the recovery
>> procedure (keeping pressed the S2 while power cycling) doesn't lead to
>> anything,
>> all led are still off.
>>
> Strange. Were you (by some chance) streaming sam
>
> We are running on Ubuntu 10.10 64bit. What do you mean with type of
> sample rates? Maybe USRP decimation rate? I am changing fft-size based
> on this.
> So for 4MHz i am using 1088 fft-size and for 2MHz i am using 544MHz
> and I am getting the problem when running with 2MHz.
>
>
I mean what
> I mean what sample rates--it sounds like 2Msps and 4Msps.
You are right.
> If you haven't touched it, then you're using TPB (Thread Per Block)
> scheduling.
What other schedulers are available? Where can I find information about this?
> uO means USRP overrun--the USRP is delivering data at a ra
Marcus D. Leech wrote on 7/6/2011 6:12 AM:
> If I decimate by 3 or more before the FFT (after vectorizing), I runs
> OK, consuming about 40% of the
> total system CPU, and not producing any 'O'.
Have you tried to find the blocks consuming the power? I once used
oprofile, and it worked quite wel
Hey Marcus,
I used oprofile to get a better idea where the problem is located.
I found that it is indeed a problem with libfftw3.
Besides the gnuradio fft block I am calculating a crosscorrelation
using the fft. That means fft-size will be 2*N-1 with vectorlength N.
So for 1024 vectorlength I will
Is there a general I/O port on the USRP2? I was told there was, but the only
thing I can find is the 20-pin unused port on the granddaughter board. If
this is a G-I/O port is it accessible from the GNU-Radio software, and which
pins are available for use?
I took a look at the schematics at
http://
I guess there's a search function for a reason; I have found a similar
question in the archives and I believe I have found a suitable answer. Sorry
for the waste of time.
On Wed, Jul 6, 2011 at 11:09 AM, Brenden Smith wrote:
> Is there a general I/O port on the USRP2? I was told there was, but th
> Having the FFT size being 2**N will certainly help, but given your
> relatively low data rate, it shouldn't be a problem
> anyway. Are you calculating the cross-correlation in Python code, or C++
> code? That will make a large difference.
I am calculating it in C++. I couldn't find a gnuradio
Hi Ryan - I just did a clean uninstall, git pull, then reinstall of the current
master; I don't see this issue at all (e.g., the "dial_tone.py" example works
just fine -- though I don't know which audio interface is being used). I'm
running 10.6.8 on a MacBook Pro (early 2009 model), 64-bit ker
Dear all,
I am trying to install UHD+GNU Radio in Linux (Ubuntu 10.10) on USRP N200
without DB by following the command:
git clone git://code.ettus.com/ettus/uhd.git
cd /host
mkdir build
cd build
cmake
p { margin-bottom: 0.
One method would be to use a single pole IIR filter to get an average of the
noise floor energy, and compare that with the average symbol energy.
On Wed, Jul 6, 2011 at 6:49 AM, George Sklivanitis <
george.sklivani...@gmail.com> wrote:
> Hello all,
>
> Lately, I am experimenting with a point-to-p
> I guess there's a search function for a reason; I have found a similar
> question in the archives and I believe I have found a suitable answer. Sorry
> for the waste of time.
Then why dont you post the link to the answer in here?
___
Discuss-gnuradio
On 06/07/2011 12:16 PM, Brenden Smith wrote:
I guess there's a search function for a reason; I have found a similar
question in the archives and I believe I have found a suitable answer.
Sorry for the waste of time.
There are no stupid questions, only stupid answers :-)
There are 16 general-
After disabling Jack and PortAudio, I see the same issue. What -were- you
thinking, Josh, when you integrated the audio components together? I think
you're secretly biased against OSX :) JK (really, I am just kidding)!
Tom & Johnathan : Here's the patch code to fix this issue; it replicates w
On 06/07/2011 12:55 PM, Yan Nie wrote:
Dear all,
I am trying to install UHD+GNU Radio in Linux (Ubuntu 10.10) on USRP
N200 without DB by following the command:
git clone git://code.ettus.com/ettus/uhd.git
cd /host
mkdir build
cd build
cmake -DCMAKE_INSTALL_PREFIX=/opt/uhd .
I'm still working on my MAC, and there's a lot of room for
improvement. At the moment, I get throughput of about 1kbps. What kind
of throughput are you getting?
Andre and George, thanks for pointing me to those papers. I'll look
through them and see if I can figure out any ways to improve my MAC.
> What the problem I got with the installation of UHD? Another problem
> I got is my computer gives "wired network" information when I plug
> the USRP board with my computer, and the computer disconnected very
> soon. I am wondering what could be the problem here?
>
Did you setup networking?
ht
Hi Marcus,
> Tom Rondeau, on the mailing list, is the guy to talk to about adding new
> blocks. There is a correlator block already.
Ok, maybe I will contact Tom.
Which block do you mean exactly?
I am looking for a block that acts like xcorr() in matlab. There is no
such block.
> I refer to samp
On 7/6/11 8:20 PM, Colby Boyer wrote:
One method would be to use a single pole IIR filter to get an average
of the noise floor energy, and compare that with the average symbol
energy.
On Wed, Jul 6, 2011 at 6:49 AM, George Sklivanitis
mailto:george.sklivani...@gmail.com>>
wrote:
Hello
Hi.
I am using USRP2 testbed. I have been recently working on plotting the
PSD of the received signal and I was able to do it. The graph plots
the signal in baseband frequency level.
Then I turned on the receiver node while keeping the sender node off.
When I plotted the PSD graph for that, I was e
It'll probably ball park the figure. You can then cross-validate it with the
error rate.
On Wed, Jul 6, 2011 at 11:50 AM, George Sklivanitis <
george.sklivani...@gmail.com> wrote:
> **
> On 7/6/11 8:20 PM, Colby Boyer wrote:
>
> One method would be to use a single pole IIR filter to get an averag
Also I have been working in a modified program of benchmark_rx for
this case. It would be more helpful if someone helps me to reduce it
or to measure it, so that I will be able to explain to the people who
will ask me about the spike.
___
Discuss-gnuradi
On Wed, Jul 6, 2011 at 10:08, Michael Dickens wrote:
> Tom & Johnathan : Here's the patch code to fix this issue; it replicates
> what "gr-audio-osx/src/Makefile.am" did. Do you want me to make a branch,
> etc., or can I just push it to the master? I affects only OSX, since it's
> within an "i
Hello everyone,
I'm just diving into the GNU Radio/Python world and have been doing some
"Hello World" sort of exercises to become more familiar. Currently I'm
working on a python program to pole my USRP2 and return pertinent daughter
board information. I am running GNU Radio 3.4.1 on Ubuntu 10.
> Hello everyone,
>
> I'm just diving into the GNU Radio/Python world and have been doing
> some "Hello World" sort of exercises to become more familiar.
> Currently I'm working on a python program to pole my USRP2 and return
> pertinent daughter board information. I am running GNU Radio 3.4.1 on
Patch worked perfectly. Thanks for the help!
On Wed, Jul 6, 2011 at 12:08 PM, Michael Dickens wrote:
> After disabling Jack and PortAudio, I see the same issue. What -were- you
> thinking, Josh, when you integrated the audio components together? I think
> you're secretly biased against OSX :)
Great! Johnathan has already incorporated it into the various GIT branches, so
us OSX users should be good to go again. Thanks for reporting it; I wouldn't
have found that bug with my default setup. - MLD
On Jul 6, 2011, at 10:28 PM, Ryan Pape wrote:
> Patch worked perfectly. Thanks for the h
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