We must not forget that each device has its own USB connection.
One reason that getting all in sync on a ' per sample' base must be
impossible.
Still a multi user system like the websdr can achieved by overlapping the
channels and let the software decide what channel the user's choice fits.
For
Dear gurus,
I am learning gnuradio Message Passing feature, but couldn't get desirable
result.
The Message seems published successfully, but not subscribed by the Message
receiver.
How to correct the error ..?
The message sender block:
// constructor
message_source1_impl::message_sou
If you're sending packets, then Length Tag Key should be
set to the packet length you're using. If you're sending
a stream (like DVB-T), then this field is not used (and
left blank).
The OFDM cyclic prefixer is used after the (reverse)
FFT block. The FFT Length in the OFDM Cyclic Prefixer
block s
Hello,
My name is Yuri.
I very new to GNU Radio, and I'm using GRC 3.7.1.
I am doing a research, and I need to modulate specific signal in OFDM. I
would like to insert cyclic prefix (or guard interval in my project, the
same thing with a different name).
I looked at the examples
under gr-di
Hi!
First of all thanks to all of you for the acceptance, I am very glad to
work on this great project!
Finally I gathered all information! I'll publish my gr-radar toolbox
within the kit-cel account [0]. This link will be permanent.
Furthermore I will blog about my progress [1] that you can kee
We are almost back up completely. Everything is back in place except for
the Trac browser for the SVN code. The SVN server is still accessible and
all of the wiki is back up and running. Just need to get the SVN browser
working again... let me know if anyone else finds any issues.
On Sat, May
On 05/13/2014 03:02 PM, Imre wrote:
(Something went wrong with my mails, hopefully doing it right now, sorry
Mike, replied directly to you)
Using Mike's example and some fiddling around:
http://www.livep2000.nl/code/grc/multichannel_input.grc
Tuning on a FM channel shows the mentioned mess,
in
(Something went wrong with my mails, hopefully doing it right now, sorry
Mike, replied directly to you)
Using Mike's example and some fiddling around:
http://www.livep2000.nl/code/grc/multichannel_input.grc
Tuning on a FM channel shows the mentioned mess,
interconnect the hardware clock? Maybe
On Tue, May 13, 2014 at 1:00 PM, xianda wrote:
> Hello
> Thank you for your patience.
> And i run 3 steps:
> 1.copy mytx.cpp to the uhd/host/example
> 2.change the CMakeLists.txt on the uhd/host/example,and just:
> SET(example_sources
> benchmark_rate.c
Hi,
I recently encountered a problem with the large number of items. I wanna
pass about 75000 items from one block to the another. I thought that I
could do this with setting the min of output items in the constructor of
the block but I got the following error by runtime:
thread[thread-per-block[
Hello
Thank you for your patience.
And i run 3 steps:
1.copy mytx.cpp to the uhd/host/example
2.change the CMakeLists.txt on the uhd/host/example,and just:
SET(example_sources
benchmark_rate.cpp
network_relay.cpp
rx_multi_samples.cpp
rx_sample
How about the PFB synthesizer detailed by TR? I'd think all the dongles
would have to be phase locked and references tones (or comb) used to
calibrate the channels. If your signals are not crossing channels then
maybe you could get away without that.
http://www.trondeau.com/examples/2014/1/23/p
On 13.05.2014 17:31, xianda wrote:
Hello
Thank you a lot.
1.But now the header document in my tx.cpp is same as the
tx_waveforms.cpp.Now what should i do?How to change the CMakeList.txt?
It's just a text file. Add your own file in there.
2.I try to test.I copy the tx_waveforms.cpp to other ca
Thanks for the report. Going to move this one offlist -- have some stuff
for you to try.
--n
On Tue, May 13, 2014 at 8:34 AM, Andy Walls wrote:
>
>
> On Fri, 2014-04-25 at 17:22 -0400, Andy Walls wrote:
> [snip]
> > > On Fri, Apr 25, 2014 at 2:14 PM, Andy Walls
> > > wrote:
> > > Hi.
>
On Fri, 2014-04-25 at 17:22 -0400, Andy Walls wrote:
[snip]
> > On Fri, Apr 25, 2014 at 2:14 PM, Andy Walls
> > wrote:
> > Hi.
> >
> > What is the recommended gr-ais repo/branch/commit that yields
> > a working
> > gr-ais with GnuRadio 3.7.x (git commit
>
Hello
Thank you a lot.
1.But now the header document in my tx.cpp is same as the tx_waveforms.cpp.Now
what should i do?How to change the CMakeList.txt?
2.I try to test.I copy the tx_waveforms.cpp to other catalogue.I try to use the
g++ to test,but it go wrong?Must i use the cmake?
Thank you.
Best
On Tue, May 13, 2014 at 9:24 AM, xianda wrote:
> Hello
> Thank you for your reply.
> 1.Because i just know a little about the cmake.If i put my
> document into another folder,maybe i should write the CMakeLists.txt.But if
> i put my document into the uhd/host/examples,maybe i
Hello
Thank you for your reply.
1.Because i just know a little about the cmake.If i put my document
into another folder,maybe i should write the CMakeLists.txt.But if i put my
document into the uhd/host/examples,maybe i change a little of the
CMakeLists.txt.Is it right?
Hello
Thank you for your reply.
1.Because i just know a little about the cmake.If i put my document
into another folder,maybe i should write the CMakeLists.txt.But if i put my
document into the uhd/host/examples,maybe i change a little of the
CMakeLists.txt.Is it right?
Hello
Thank you for your reply.
1.Because i just know a little about the cmake.If i put my document
into another folder,maybe i should write the CMakeLists.txt.But if i put my
document into the uhd/host/examples,maybe i change a little of the
CMakeLists.txt.Is it right?
On Mon, May 12, 2014 at 10:43 AM, bob wole wrote:
> Thanks for your reply Tom. Could I have some more explanation on it? if
> a training sequence at start of each burst could help in fast convergence
> for burst modem?
>
> --
> Bob
>
Time-domain equalizers just generally take a bit of time to
On 13.05.2014 11:05, Mostafa Alizadeh wrote:
Hi everybody,
I was wonder why I can't make a class of topblock in c++ like in python
as said here:
http://gnuradio.org/redmine/projects/gnuradio/wiki/TutorialsWritePythonApplications
Then I think, I can control the flowgraph, start or stop it , dis
I recommend you spend some time with the OFDM blocks over simulated
channels on your PC to become familiar with the basics. Using the E110
is not a simple task, make sure you've become fully familiar with that
device before you attempt to do something sophisticated.
M
On 13.05.2014 11:47, Wa
If you Google "USRP E100 update gnuradio" it points to the following
instructions:
http://ettus-apps.sourcerepo.com/redmine/ettus/projects/usrpe1xx/wiki/FAQ#How-do-I-install-GNU-Radio-from-source
Mike
--
Mike Jameson M0MIK BSc MIET
Ettus Research Technical Support
Email: supp...@ettus.com
Web: h
plz how to proceed ?
Thanks a lot
2014-05-13 11:47 GMT+02:00 Wafa Elhajhmida :
> Hi,
>
> I'm working on USRP E 110 card in order to implement OFDM channel on it.
>
> In fact, I would like to remove the old version of gnuradio installed in
> USRP E 110.
>
> Then, I would like to install gnuradio
Thanks a lot, it really got me going! This is part of my learning process,
if it's leading to nothing at all; that's okay.
Somewhere I red about feeding multiple dongles from a single signal
source, interesting
A possible configuration:
1. Upconverter & 30 Mhz low pass filter
2. Cheap wideba
It is written:
Using Volk machine: avx_64_mmx
Best
On Tue, May 13, 2014 at 10:49 AM, Martin Braun wrote:
> On 12.05.2014 12:53, Nemanja Savic wrote:
>
>> I finally disabled doxygen and everything was built fine, but the test
>> fails at pfb_arb_resampler:
>>
>> FAIL: test_ccf_001 (__main__.test
Hi,
I'm working on USRP E 110 card in order to implement OFDM channel on it.
In fact, I would like to remove the old version of gnuradio installed in
USRP E 110.
Then, I would like to install gnuradio 3.7.4 on USRP E 110(the version that
as far as I know contains the different blocks necessary t
If you want 1e6 Hz (1MHz) of receive bandwidth at a center frequency of
2.4e9 Hz (2.4GHz) then you just set the center frequency to 2.4e9 and
sample rate to 1e6 in the UHD source block in GRC.
Mike
On Tue, May 13, 2014 at 10:04 AM, jason sam wrote:
> I am confused about the sample rate in GRC..
Hi everybody,
I was wonder why I can't make a class of topblock in c++ like in python as
said here:
http://gnuradio.org/redmine/projects/gnuradio/wiki/TutorialsWritePythonApplications
Then I think, I can control the flowgraph, start or stop it , disconnect or
connect blocks and anything else .
I am confused about the sample rate in GRC...if i am RXing a signal by USRP
B210 at 2.4 GHz then the sample rate should be 4.8GHz??But USRP B210 uses a
direct conversion RX and shifts the signal to 0Hz,so what should be the
criteria for setting the sample rate?
Another option could be ton set it do
On Tue, May 13, 2014 at 4:04 PM, Martin Braun wrote:
> On 13.05.2014 08:21, Activecat wrote:
>
>> We have "gr_modtool disable ABC" to disable the ABC custom block.
>> But how to enable it back?
>> (There is no "gr_modtool enable" or equivalent).
>>
>
> Huh, I thought I'd put that in there. Well, s
On 12.05.2014 12:53, Nemanja Savic wrote:
I finally disabled doxygen and everything was built fine, but the test
fails at pfb_arb_resampler:
FAIL: test_ccf_001 (__main__.test_pfb_arb_resampler)
--
Traceback (most recent call las
On 12.05.2014 17:49, Imre Biacsics wrote:
Playing around with GRC for a few months now, sorry if this question is
from a dummy.
I've a bunch of rtl dongles laying around, and wonder if it's possible to
combine more then one to a single baseband signal.
The goal is to create a super cheap full H
On 13.05.2014 07:14, asad umer wrote:
I am also using the delay block in the way u have mentioned but the
signal in scope doesn't act accordingly ,it remains in phase with the
original...
That's unlikely. Do this:
1) Connect sig source into port 1 of your scope (e.g. create a sine wave)
2) Co
On 12.05.2014 20:19, Marcus Müller wrote:
Well, not that I'm aware of.
However, FFT, multiplication with a signal source, IFFT is not really
hard to do, and it's what a time shift mathematically is.
Careful... if you do that on a stream, you have to keep track of phases.
I know Marcus knows thi
On 13.05.2014 08:21, Activecat wrote:
We have "gr_modtool disable ABC" to disable the ABC custom block.
But how to enable it back?
(There is no "gr_modtool enable" or equivalent).
Huh, I thought I'd put that in there. Well, seems I haven't.
In any case, 'disable' simply comments out all releva
On 13.05.2014 09:35, 王先达 wrote:
Hello all
I write a c++ document mytx.cpp and i place it into the
uhd/host/build/examples.And then what should i do to let it run?Should i
type the "make" command in the shell or do other things?Thank you.
Best regards,
Xianda
You don't have to p
Hello all
I write a c++ document mytx.cpp and i place it into the
uhd/host/build/examples.And then what should i do to let it run?Should i type
the "make" command in the shell or do other things?Thank you.
Best regards,
Xianda
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