inspectrum
gnuradio
inspectrum | gnuradio | |
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3 | 22 | |
1,991 | 4,796 | |
- | 0.7% | |
4.7 | 9.4 | |
about 1 month ago | 6 days ago | |
C++ | C++ | |
GNU General Public License v3.0 only | GNU General Public License v3.0 only |
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inspectrum
- Inspectrum: Radio signal analyser | GitHub: miek
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Decoding Digital Signals
Inspectrum https://www.rtl-sdr.com/using-a-yardstick-one-hackrf-and-inspectrum-to-decode-and-duplicate-an-ook-signal/
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Can't view the waveform of FSK key fob recording in audacity
Alternatively, inspectrum can make an FSK plot from a baseband recording as shown on the page linked. This will be easier to look at than the spectrogram.
gnuradio
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Upsampling in Gnuradio is necessary?
In gr-dtv transmitter examples for Gnuradio, I see some times people use a resampler block before the RF hardware sink. Say our sampling rate is ~9.14Msps which satisfies the Nyquist criterion because our samples are complex numbers.
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Capturing FM using SDR
2.1. Thanks for that tip, I forgot that I was able to check the source code of the WBFM Receive block. As you have said, there are mostly the same. There are some differences between how values are picked. The WBFM Receive block would be a synonym of Quadrature demod => Fir Filter (decimation => Low pass filter) => FM Deemphasis. 2.3. My question there is why 10 and not 20 or 100. I understand that the idea is to reduce the sample rate asap, but what I don't understand is why those values were picked and how can I understand what would be the "correct" or "best" value. 2.4. I'm not fully understanding what you said. If I check the WB FM recieve source code the values that are supplied as the cutoff freq and transition width of the Low pass filter differ from the one of the example. The webfm would apply a sample rate / decimation / 2 - sample rate / decimation / 32 as a cutoff freq and a sample rate / decimation / 32 as a transition transition width. Calculating those values would end up in different that the ones supplied in this second example. Again, is there a rule of thumb to pick these values?.
- Hello everyone! I would like to install and run GNU Radio version 3.7.4 in order to follow along with The HackRF GNU Radio tutorial on greatscottgadgets.com/sdr/ but I can’t find prior releases to install. Can anyone help?
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Multi band gfsk demodulation with Nooelec RTL-SDR v5 SDR and gnu radio
Gaussian filter is used only on the tx side, so specifying bt in the receiver makes no sense. Take a look at gfsk mod/demod blocks implementation: https://github.com/gnuradio/gnuradio/blob/master/gr-digital/python/digital/gfsk.py
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What would you rewrite in Rust?
GNU Radio
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Is there a way to delay a signal in time-domain?
Here's the filter coefficients used for the GNU-Radio interpolator block to get you started. This is a 7th order interpolator (i.e., 8 FIR taps) with very good performance. Each "row" of the array sets the delay in steps of sample_time / 128.
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My grandpa is a huge HAM radio fan, so I showed him GNU Radio. Got this text the day he got back home.
From their README: “open-source software development toolkit that provides signal processing blocks to implement software radios.” https://github.com/gnuradio/gnuradio
- The future is now ... again
- GNU Radio
- GNU Radio – the Free and Open Software Radio Ecosystem
What are some alternatives?
faust - Functional programming language for signal processing and sound synthesis
PothosSDR - Pothos SDR windows development environment
audiogridder - DSP servers using general purpose computers and networks
SDRPlusPlus - Cross-Platform SDR Software
roc-toolkit - Real-time audio streaming over the network.
Node RED - Low-code programming for event-driven applications
DtBlkFx - Fast-Fourier-Transform (FFT) based VST plug-in
gnss-sdr - GNSS-SDR, an open-source software-defined GNSS receiver
q - C++ Library for Audio Digital Signal Processing
sdrangel - SDR Rx/Tx software for Airspy, Airspy HF+, BladeRF, HackRF, LimeSDR, PlutoSDR, RTL-SDR, SDRplay RSP1 and FunCube
gr-tempest - An implementation of TEMPEST en GNU Radio
srsRAN_4G - Open source SDR 4G software suite from Software Radio Systems (SRS) https://docs.srsran.com/projects/4g