Hi all,
I have been trying to capture data as well as meta data in file meta
sink in GNURadio. When I run my gr-ieee802.11 receiver flowgraph with no
file meta sink, it captures the signal transmitted by a dedicated source
which is always turned on. However, when i just try to capture and stor
Hi folks,
Has anyone else started getting an error like this off of maint-3.7 with
osmosdr as the source?
return _runtime_swig.top_block_start_unlocked(r, max_noutput_items)
RuntimeError: list contains invalid format!
I narrowed it down with a basic flowgraph that's just an osmo source and a
nul
Hello there,
I am getting started with the zigbee transceiver now. The same .grc file
work well on another pc but not for this one. I found it is using a later
version of GNU radio. Is it the reason it could not generate the .py file
successfully? Below is the issue about its 'Type Error'. I found
That phase is not any more or less random than that of your local
oscillator, so there might be some misunderstanding here.
On Tue, 2019-07-16 at 18:52 +0100, Simona Sibio wrote:
> Thank you very much!
> But, with the offset tuning I cannot edit the phase.
> Maybe, I have to change method.
> Best R
Thank you very much!!
Then, I cannot measure a constant because, in the RX chain, maybe, some
filter deletes the information, doesn't it?
Thank you for your time and tour tips!
Best Regards,
Simona
Il giorno mar 16 lug 2019 alle ore 18:01 Müller, Marcus (CEL) <
muel...@kit.edu> ha scritto:
> Lo
Look up what a quadrature modulator does. It's just a multiplication
with e^{j2\pi f_{carrier}t}, in the end.
Your constant signal s(t) = c const. would hence be transmitted as
c·e^{j2\pi f_{carrier}t}
whereas a complex sinusoid of frequency f and amplitude a,
s(t) = a·e^{j2\pi f t) would be tra
Hi Marcus,
Thank you for tip!
I know that calibration is not so easy but I hope that.
Could you help me to understand what happened with a constant complex
baseband signal?
I am beginner in this field.
Thank you for your time.
Best Regards,
Simona
Il giorno mar 16 lug 2019 alle ore 17:39 Müller
Ettus USRPs are not calibrated measurement devices, so be a bit careful
with actually measuring power with them: you'll need to calibrate
things yourself for every sample rate, carrier frequency, antenna,
temperature … combination.
Best regards,
Marcus
On Tue, 2019-07-16 at 17:37 +0100, Simona Si
Watch out! What do you get at the *output* of your SDR device when you
transmit a constant complex baseband signal, mixed to a carrier
frequency? How does that differ from transmitting a complex baseband
sinusoid mixed to a carrier frequency?
On Tue, 2019-07-16 at 18:32 +0200, sumit kumar wrote:
>
Hi Marcus and Sumit,
Thank you for the answer.
I tried with different sampling rate until 5M.
And I connected the spectrum analyzer to measure the power.
Practically, I would like to measure the power also in the receiver.
Best Regards,
Simona
Il giorno mar 16 lug 2019 alle ore 17:20 Müller, Mar
Ok, so for a constant source, in the time domain you will see a flat signal
only! Try connecting a spectrum analyzer and you shud see a peak at DC becz
Fourier transform of constant signal is impulse.
And yes, as Marcus said, increase the sampling rate!
[image: Screenshot from 2019-07-16 18-29-17.p
Hi Simona,
* think about what you're *actually* transmitting in bandpass when you
have a constant baseband
* A USRP still can't be used at a sampling rate of 32 kS/s and will
most definitely complain about that. Use a higher rate.
Best regards,
Marcus
On Tue, 2019-07-16 at 17:05 +0100, Simona Si
Hello gnuradio users,
I want to implement a general block which have two inputs and one
output. The general_work of this block should be called when one of the
inputs is available. My task is just tagging and copying inputs to the
output.
But my block is called any time, even if there is no
Hi Simona, what is the "constant signal" here ?
On Tue, 16 Jul 2019 at 17:54, Simona Sibio wrote:
> Hi all,
>
> I want to use GNU radio to measure the amplitude and the phase of a signal.
> I send a constant signal with the transmitter USRP but in the receiver
> there is a flat signal with ampli
Hi all,
I want to use GNU radio to measure the amplitude and the phase of a signal.
I send a constant signal with the transmitter USRP but in the receiver
there is a flat signal with amplitude 0 and offset 0.
I tried to send a sine signal and the receveir works fine.
How can I do to send only a co
Dear Marcus,
Thank you so much for your response.
I will contact with my professor about it soon.
Sincerely,
Atiqur
On Tue, Jul 16, 2019 at 12:45 PM Müller, Marcus (CEL)
wrote:
> Hi Atiqur,
>
> On Tue, 2019-07-16 at 12:02 +0200, Md. Atiqur Rahman wrote:
> > I really need to know that SPS(samp
Hi Atiqur,
On Tue, 2019-07-16 at 12:02 +0200, Md. Atiqur Rahman wrote:
> I really need to know that SPS(samples per symbol) like 16,32,64 so on for
> qpsk scheme, possible to take?
Uh-oh! You're confusing things. Samples per Symbol is a property of
your pulse shaper, not of your constellation.
Dear Kyeong,
Thank you for your response.
>>your data rate is simply the sampling rate (in the source block) divided
by SPS (smaples per symbol) multiplied by bits per a symbol (2 for QPSK).
Clearly, it does not tell you anything about the supported sampling rates
of the board.
I really need to k
Hi,
Off-topic: not sure about the terminology in the GNURadio community, just be
aware that for most electrical engineers “sps” means samples per second and not
samples per symbol. I’d rather not use the acronym at all in a block diagram to
improve readability.
Cheers,
Jonas
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