the features are not important for me now
Then you can literally buy a rock. It has pretty bad reception, and all
receivers built with rocks have a 50% bit error rate. (just kidding)
SDR peripherals are technical equipment. There has to be *some*
specification of what you need. Like Bandwidth.
Hi all,
First time posting here, so hello everyone:)
I am trying to build this pair of GNUradio flow graph for QPSK signal
transmitting and receiving over the air through USRP. Now the
transmitter side is straight forward, only a random number generator and
QPSK modulator plus a multiplier. The
Hi All,
I have some issues when using UHD sink and source blocks in same flow graph.
When I transmit data with UHD sink, I use tx_sob and tx_eob. I don't get
any underflow error.
But, the problem is that I can see all data sent by the TX path, in the RX
path.
I don't understand how this can be
Ping?
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GNURadio 3.7.8 works well on ubuntu 15.04. I used PyBOMBS to install it.
On Mon, Aug 17, 2015 at 11:54 AM, Neel Pandeya neel.pand...@ettus.com wrote:
Hello John:
Ubuntu 15.04 uses the new GCC 5. I haven't yet tried building UHD and GNU
Radio with it myself, but maybe there are issues??
Matthias,
I can see how this would be a pretty cool demo. Off the top off my head,
some thoughts:
- The RRC is implemented as a FIR in C++ (a pfb_arb_resampler_ccf, to be
precise). But this doesn't have a method to update the taps :/
- An update-able filter would be interesting, though. If you
Hi Pedro,
Buy a RTL dongle, since they're almost free. If it doesn't do what you
want, then you'll know more about what you want.
Jeff
On 08/17/2015 03:09 PM, Marcus Müller wrote:
the features are not important for me now
Then you can literally buy a rock. It has pretty bad reception, and
I am trying to build GNU Radio for Android and am having issues with the
build process.
I first tried building GNU Radio for Android on Mac OS X 10.10.4. I was
able to follow the directions successfully until I had to build gr-grand.
When I tried to build gr-grand I got this error (see error 1).
Hi! I'm using gnuradio on ZedBoard and was trying a simple OFDM Mod
system just like in this video
https://www.youtube.com/watch?v=LZDWfnrxo6c
the flowgraph just looks like this... random sourceshort to floatofdm
modthrottlewx gui fft sink
and this comes up...
Generating:
I am trying to build GNU Radio for Android and am having issues with the
build process.
I first tried building GNU Radio for Android on Mac OS X 10.10.4. I was
able to follow the directions successfully until I had to build gr-grand.
When I tried to build gr-grand I got this error (see error 1).
Hello,
I'm transmitting a fairly bursty, irregularly timed signal. I attach a
stream tag to the sample that has the start of the burst (tx_sob). I also
have a PA that I can turn on and off that's inbetween my USRP B210 and
antenna.
I'd like to be able to turn the PA on and off synchronously,
Hi all,
Would someone please recommend a good starting point in C++ source code
that demonstrates how one uses the kernel::fir_filter. I started following
the pfb_clock_sync method of implementing it, but then realized this had
been customized a bit for the polyphase approach.
I'm not doing
Install blas, lapack or something that supplies the missing library.
Philip
On 08/18/2015 12:54 AM, Barry Jackson wrote:
Ping?
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Rich,
hilbert_fc.cc and filter_delay_fc both use kernel::fir_filter in a
relatively easy to understand way.
Jeff
On 08/18/2015 04:26 PM, Richard Bell wrote:
Hi all,
Would someone please recommend a good starting point in C++ source code
that demonstrates how one uses the
I have had similar problems with cheap USB cables that work for
low-speed devices, but utterly fail for higher-speed transfers.
You might as well update to at least Ubuntu 14.04 or even 15.04, Gnu
Radio (via build-gnuradio) is known to work in that environment.
On 2015-08-18 10:42, Mark
I managed to resolve a problem with the install.
Commands, find_usrp_devices and uhd_usrp_probe failed to get my B100 to
respond with the model and daughter board and FPGA information. Yet at other
times it would work, albeit very briefly.
Whilst trying to keep this follow up mail brief,
There's enough leakage between the TX and RX paths (inevitable) that
your RX will see your TX side transmissions.
On 2015-08-18 03:26, Marius Cachelin wrote:
Hi All,
I have some issues when using UHD sink and source blocks in same flow graph.
When I transmit data with UHD sink, I use
Take a look at the phase rotator in the frequency translating FIR filter.
Is it done with sine/cos lookups or is it a rotating phasor? Rotating
phasors can lose amplitude due to finite precision effects.
Matt
On Fri, Aug 14, 2015 at 1:57 PM, John Ackermann N8UR j...@febo.com wrote:
Still
Patrcia,
try the new OFDM blocks. I suggest starting with the example
ofdm_loopback.grc and working from there to see how things work,
Cheers,
Martin
On 17.08.2015 22:39, Patrcia Wonder wrote:
Hi! I'm using gnuradio on ZedBoard and was trying a simple OFDM Mod
system just like in this video
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