Amateur Radio Stack Exchange
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Questions tagged [gnuradio]

A widely used toolkit used to develop software-defined radios and general signal processing applications.

151 questions
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Sine signal distorted in GNU Radio

I am starting off with the Ettus Research lab-1 - lab-5 tutorial to learn GNU Radio. I have set up the following super simple flow graph. I am using WX GUI as it is what used in the tutorial. This flow-graph works well for low frequencies. As…
Denis
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FFT showing 2 signals - GNU Radio

I receive OOK signals from a remote control in 433MHz. I'm using a dongle RTL-SDR on GNU Radio. The FFT output signal from the RTL-SDR Source block is represented on the picture: My question is, why i have two signals with similar amplitude?…
Marcos Pinho
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How to measure signal power in GNU Radio.(I wondered how much dBm is specific.)

I used the "QT GUI frequency sink" and "WX GUI FFT sink" to measure the signal. But I got different value. I would like to know what dB stands for in them. Whether it is dBm or just a ratio.
H.Dog
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How to change the display order of qt gui sink in gnuradio?

I create simple flow graph in gnuradio as below: The expected output order is: 1.qt gui sink 2.frequency sink 3.time sink But time sink appear first,then gui sink: How to change the display order of qt gui sink in gnuradio?
kittygirl
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I want to know how QT GUI Entry is implemented in gnuradio. I am puzzled how the code is like?

I find it on the website. Only the following passage: QTGUI Widgets The QTGUI component also includes a number of widgets that can be used to perform live updates of variables through standard QT input widgets. Most of the widgets are implemented…
H.Dog
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How to avoid overflow in embedded python block in GNURadio?

I am currently working on project which utilizes RTL-SDR for capturing packets. I want to capture packets incoming on two different channels. I created the following RF path and it works just fine in terms of capturing packets and converting them…
Artur
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Problem to realise a frequency band sweeper with GNU Radio

I am very new to GNU Radio, and I am stumbling to realise a periodic frequency band sweeper. The idea is as follow: given a sampling rate samp_rate, a start frequency f_start, a stop frequency f_stop, a number of channels n_channels, and a sweep…
aheuchamps
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How to record fixed number of samples in gnuradio

Is it possible to set a gnuradio flowgraph to record with a File Sink a fixed number of samples? I would like to use this wave as a reference. Thank you!
Friedrich Maar
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GnuRadio alternative for Selector Block

Hi I want to switch between tx and rx in a flow graph with my HackRF. I found this video that shows how it could be done. The key component is the Selector block which is now deprecated. Is there a alternative way to the selector block method? I…
maxbit89
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Automatic transmitter-receiver

I am studying on making automatic transmitter and receiver with usrp on gnuradio. Firstly, I should transmit any signal with center frequency 400,410,420,430 Mhz with 2 seconds waiting time for each frequency and it should repeat itself. Then, at…
furkan aydın
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gr-osmosdr Could NOT find Boost (C++ libraries)

End goal: Play about with RTL-SDR in GNURadio Companion While following the instructions on this page, I've run into errors concerning the Boost C++ libraries. While building the gr-osmosdr blocks to use in GNURadio, cmake fails to complete because…
OhNoNotScott
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How to set the time sink to roll mode like oscilloscope?

How to set the time sink to roll mode like oscilloscope? The signal rolls in from the right side of the oscilloscope screen and rolls out from the left side so that we can see the complete picture of the signal.Instead of focusing on signal segments…
nicholasfor
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the transmission and reception block for the hackRF does not work Windows 11

Previously, I used the "Osmocom sink" and "Osmocom Source" blocks, but after updating the GNU radio to version 3.9.4, these blocks were gone. As far as I understand, now it has been replaced by "Soapy HackRF sink", but I cannot start the…
Антон
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ASK? PWM? decoder for gnuradio companion?

EDIT: Based on a comment below, this might actually be a two-level PWM, rather than simply ASK. Frankly, I don't really know, but any decoder blocks that folks are aware of for any of these basic coding types would be of interest--after all, I'm…
Toby Eggitt
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GNURadio Guided Tutorial PSK Demodulation Example

I have been reading and doing the steps on this webpage of GNURadio : https://wiki.gnuradio.org/index.php/Guided_Tutorial_PSK_Demodulation In the middle of the page, there is a section: "Using the Polyphase Clock Sync Block in Our Receiver". It has…
A.Aalipour
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