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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 control bandwidth in OFDM using GNURadio

I am trying to simulate an 802.11 OFDM signal at 20/40/80 and 160 MHz bandwidths using GNURadio, starting with the ofdm_tx.grc example. Using this example I can easily generate a 20 MHz signal simply by increasing the sample_rate to 20M. However I…
jknoles
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Docker GUI Font Problems

I am currently having issues with the font display when running GNURADIO Companion from a docker environment. I can get the GUI to show, but the font characters are displayed as wingdings, which I am unable to read. Does anyone know how to solve…
mwk088
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Reading .bin or .dat file in Python

I am generating a binary file. I opened it using hexdump, it looks like this below enter image description here But when I try to read this file in python using file = open("lfsr.bin","rb") data = file.read(10) print data It's printing blank/empty…
Yaaseen Mohamed
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Detect a keypress in GNURadio

How would I detect a keypress inside of GNURadio, or even more specifically how would I change a variable if a key is down or up? [Edit] Example: A push to talk on a SDR driven HAM radio station thats using GNUradio, so when I press 'V' (on my…
Jeremiah
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no module named gnuradio

I installed the UHD and GNU Radio on Ubuntu 16.4 based on instructions (https://kb.ettus.com/Building_and_Installing_the_USRP_Open-Source_Toolchain_(UHD_and_GNU_Radio)_on_Linux) I’m getting the following error when I try to run the example provided…
Steve
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AttributeError: log10 in python

I'm creating a customized block in the GNU Radio framework using python that takes in a number of input items and once that number of input items surpasses a certain number, 1024 of the input items are taken and stored into an array, and then those…
Tellrell White
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Unicast message in GNURadio

I have one USRP B210 and E312 and all the message transferred between them are via the broadcast message. Is there any way to transmit a unicast message (point to point) in GNURadio? If yes, can you please help me with an example?
Mahesh Jena
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FM Receive in gnuradio using USRP(type b100)

I am using USRP b100 and i want to receive fm audio. it does not give proper sound here is the link of screen shot of simulation, configuration of some blocks https://github.com/faydal077/gnuradio.git it mainly says "The request decimation is…
Shadman Faysal
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demodulate GFSK with quadrature demod

Hi I am trying to demodulated a GFSK signal using gnu radio I connected an osmocom source to FIR filter and the filter to Quadrature demod (which output the signal to a file) as shown here: my flow graph the Quadrature demod gain is -…
Yedidya kfir
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Ways for transmitting data using GNU Radio and soundcards

I am working on a Free-Space-Optics transceiver that uses the soundcard of a computer, a LED, a photodiode and a lens to transmit data over the air. At the moment I am trying to connect two transceivers with the help of GNU Radio. The GNU Radio…
zelyev
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How to determine fsk_deviation_hz?

Using gnuradio how can I determine fsk_deviation_hz? I'm new on rf analisys and I can't find how to retrieve that value starting from the signal... What i have to look?
fraschizzato
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GFSK Demod Samples/Symbol

Starting from a signal, how to determine correct Samples/Symbol value? Here a link to the file i'm using: gfile271 And there is my flowgraph:
fraschizzato
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Signal Bit Recovery

I'm new on using GRC. I'm trying to decode data from an fsk device. I've grabbed data with rtl_433 -a -t (I/Q 2 channel uint8), eliminate noise, quadrature demod, low pass filter, centered wave and binary sliced. So i get this: Starting from here…
fraschizzato
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Custom Blocks Problems GNU RADIO

I'm having some problems with my flowgraph in GNU Radio. I built a custom block to be a Delay block because the native block didn't work very well for my application. Before my custom block there is a UHD Source. It's working in a sample rate of 4M.…
Luis Antonio R. Scudeler
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Using GNUradio audio sink in windows enviornment

I have just downloaded GNU Radio's installer for the windows environment and am having trouble with simple audio playback from a wav file. The audio file will play but is 'choppy' and seems to be playing back at the wrong sample rate (difficult to…
Ed Coleman
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