multimon-ng
gnuradio
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multimon-ng | gnuradio | |
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15 | 22 | |
886 | 4,783 | |
- | 1.6% | |
4.3 | 9.4 | |
4 months ago | 5 days ago | |
C | C++ | |
GNU General Public License v3.0 only | GNU General Public License v3.0 only |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
multimon-ng
- Pdw and POCSAG decoding
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message hidden in video from an obscure challenge
I have little experience with decoding radio signals so I don't know if any software decoders are expected to handle the clipping. I tried using multimon-ng and found that its UFSK1200 demodulator can get something out of the audio, but it also keeps repeating Error: stop bit is 0. Bad framing if verbose mode is enabled.
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why am I getting no pages on PDW? I have set EVERYTHING up as per the instructions. I have played with all the settings. nothing
Sorry I gave wrong name, it is multimon https://github.com/EliasOenal/multimon-ng and is capable to decode:
- Funcube dongle with multimon-ng for pocsag decode
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Questions regarding POCSAG receiving
It's likely that the signal is extremely strong. You can probably just pick it up with a short antenna indoors. I used MultiMonNG to decode. It's was pretty boring to be honest.
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Pocsag decoding
Give multimon-ng a whirl. This is CLI based, but can output what it decodes to a simple text file or hex data to do what you need with.
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What do you use your homelab for?
multimon-ng
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A list of things I could do with SDR
POCSAG, FLEX (pagers), Morse, APRS and more with multimon-ng
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What OS has the best software for RTL-SDR? I currently use gqrx but feel its limited.
multimon-ng for decoding various protocols.
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Pager messages
Try this tool; https://github.com/EliasOenal/multimon-ng - It's CLI and you'll ideally want a Linux, but this can decode an awful lot more data modes like such.
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?
dsd - Digital Speech Decoder
PothosSDR - Pothos SDR windows development environment
direwolf - Dire Wolf is a software "soundcard" AX.25 packet modem/TNC and APRS encoder/decoder. It can be used stand-alone to observe APRS traffic, as a tracker, digipeater, APRStt gateway, or Internet Gateway (IGate). For more information, look at the bottom 1/4 of this page and in https://github.com/wb2osz/direwolf/blob/dev/doc/README.md
SDRPlusPlus - Cross-Platform SDR Software
rtl_433 - Program to decode radio transmissions from devices on the ISM bands (and other frequencies)
Node RED - Low-code programming for event-driven applications
gnss-sdr - GNSS-SDR, an open-source software-defined GNSS receiver
sdrangel - SDR Rx/Tx software for Airspy, Airspy HF+, BladeRF, HackRF, LimeSDR, PlutoSDR, RTL-SDR, SDRplay RSP1 and FunCube
pagermon - Multimon-ng pager message parser and viewer
srsRAN_4G - Open source SDR 4G software suite from Software Radio Systems (SRS) https://docs.srsran.com/projects/4g