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Questions tagged [gnuradio-companion]

GNU Radio Companion (often abbreviated as GRC) is a graphical toolkit to design GNU Radio flowgraphs and whole signal processing algorithms.

GNU Radio Companion (often abbreviated as GRC) is a graphical toolkit to design GNU Radio flowgraphs and whole signal processing algorithms.

It's not an independent project, but is included in GNU Radio. The graphically defined flow graphs get translated into Python source code that instructs GNU Radio to logically connect the blocks used.

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How to create a parameter in a hierarchical block that references an external/global variable?

Many of the default blocks in GNU Radio Companion have their Sample Rate parameter set to samp_rate, and as such, when the blocks are added on to the canvas, they immediately take the value of the samp_rate variable (assuming it exists of…
Amr Bekhit
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Why is the QT GUI affecting flowgraph performance so much?

When I change the flowgraph options of the rx_ofdm.grc example shipped with gnuradio from No GUI to QT GUI and leave run=True, the flowgraph in its default configuration (10 k Samples/s) causes 100% CPU load on one core. Even with 1 k Samples/s…
Binabik
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GMSK transmission issues on GnuRadio

I'm trying to implement rather simple scheme to transfer data from one sdr board to another. I'm using GnuRadio 3.7.14 and my scheme in companion looks like this Source file is a binary of 96 bytes long and it looks like this 00000000 00 00 00 ff…
Геннадий Казачёк
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Error installing package GNU radio using PYbombs

Hello I am trying to install GNU radio using Pybombs as I need Out Of Tree modules to be added. I tried to install using commands given below sudo apt-get install python-pip sudo pip install pybombs pybombs auto-config pybombs recipes…
poonam
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MPT1327 FSK Clock and data recovery

I have to reverse engineer mobile radio terminal over air polling responses to recover location data. I can recover the bit-stream using gnu radio stack overflow link but cannot get the clock recovery module to work. Data is 1200 Baud, CRC16 so can…
AidanH
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Compiling gnuradio-3.8.0.0 with gnuradio-companion support

gnuradio-companion works fine for me with gnuradio-3.7.13.4, but fails to be selected when configuring gnuradio-3.8.0.0 for compilation. When configuring gnuradio-3.8.0.0, cmake reports this: --…
Chris Vine
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ZeroMQ Gnuradio interface

I am using a ZMQ PUB Message Sink in my GRC application and want to send the message to my C ZMQ SUB application. Everything works, except that I have 10 bytes to much. I.e. there is some kind of a 10 byte header (always the same sequence). At the…
ben
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QPSK Mod and Demod

I have implemented the attached flow graph but I am unable to receive the same data/text via file. image I am sending '0011' data via .txt file but receiving ' ' garbage data in received text file Where is the problem in flow graph?
Khan
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Transmitting and receiving on GNURadio osmocom

I want to transmit QPSK modulated signal and simply receive it simultaneously to a file using SDR platform (Bladrfx40), but no output shows on received side. Here is the flow graph I implemented: Here is what I want to receive and what is being…
Khan
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Making my own Signal Source Block using Python Module in GNURadio

I have made my own Signal Source using Python Module Block, I have a problem getting the output of self-coded Signal Source Block at different frequencies (in fact i don't know how to do it). The only output that shows in FFT plot is at 0(MHz).…
Khan
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flowgraph exit with error code -11 after start

I am a gnuradio 3.7.13.4 using WXGUI and a rtl sdr donggle on debian 4.19.28-2. I tried to install gr-lora, since that i can't launch any flowgraph on gnuradio without having the -11 error code. First, i assume that gr-lora has some bug and unistall…
Nicolas BREARD
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Making an own signal source using Python Module in GNURadio

I want to use cos() function in my code to make my own signal source, but i don't know how to get the output with both the quadrature phase too EXACTLY like what a built-in signal source outputs. Can anyone please help me with the python code to…
Khan
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Why are some blocks in gnuradio companion missing in raspbian, such as the Embedded Python Block?

I use GRC for signal processing. Some blocks are missing in the raspbian version. For example the Embedded Python Block is available in GRC windows, but in the raspbian version it is missing. Why is this the case?
Behrooz Elahi
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How to multiply two parameters in a gnuradio-companion xml file

I have to user set parameters in the grc gui and I need to multiply them to set the output vector length of my block. I cannot figure out how to do this in the grc xml file. I have tried looking at cheetah documentation but it has no examples of…
Aaron Lutzker
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Do I want to (i)fft by gnuradio-companion?

To dark blue input ,Arrow becomes red. Hi, everyone! I use gnuradio-companion 3.7.11 with ubuntu 18.04.2 lts, I want to do (I)FFT, but when both input and output specify complex, Even if the complex is dark blue and complex is light blue, It becomes…
sunao
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