Now that we have the #GNUradio transceiver working we will work on enhancing it next.
The first enhancement is adding some indicators for audio levels, clipping peaking etc.
Next is things like ALC and AGC, (TX, RX, respectively).
I've already found some interesting topics that talk about the differences between traditional audio compression for SSB and envelope clipping.
I've been messing about with GNU Radio and an old RTL2832/R820T2 SDR. I think I've gotten the hang of it and it's kind of fun.
One thing I'm still looking for is a decent waterfall sink. The "QT GUI Waterfall Sink" is nice but it's not a waterfall. It flows up. Search turns up folks annoyed with this but no resolution.
Anyone have a link to better waterfall code?
40 hours give or take, but I finally have #gnuradio talking directly to my ft857d using #soapyaudio and #hamlib - RX only at the moment, but I'm going to be working on TX.
After calming down from all the excitement, I'll document the parameters and commit a proof of concept.
The silly GNURadio HF transceiver flowchart is done. It uses no custom blocks or embedded Python.
It is quite fragile but it really works. You can try it out yourself here:
https://gitlab.dantalion.nl/sdr/limesdr-hf-transceiver
Attached is an image of the GUI and the flowchart.
"Get a first look at the #QuadRF, a modular 4x4 MIMO beamforming tile built with an open antenna architecture that moves software-defined radio into the spatial domain. Functioning as a real-time RF camera, the QuadRF allows you to visualize the #wireless world around you."
#OpenSource #wifi #SDR #gnuradio
https://youtu.be/38GKlCrGTQM
okay Mastodon is clearly not the place where #gnuradio people hang out.
Any direction to a pool of knowledgable people?
I'm writting a detailed blog post on using high sampling rates to transmit narrowband signals far away from the #LO. In these conditions filtering, aliasing and under runs are important subjects.
The benefit of modulating away from your LO is that you can reach further down or up from you LO limits.
In the case of the LimeSDR this allows to reach down to 0Hz.
The blog post will use #GNURadio to illustrate these effects.
You can subscribe to #RSS to be notified early
https://dantalion.nl/feed.xml
Here's the video. As I mentioned earlier, this time I'll show you how I added audio to the LaserDisc RF signal.
@Quantensalat @scott @k8vsy @KC8JC
Should have searched first. Here are a few findings:
https://github.com/tapparelj/gr-lora_sdr
https://events.gnuradio.org/event/24/contributions/641/attachments/192/477/slides_tapparel.pdf
Now off to buy a few “properly licensed” modules to help Scott’s stock return. :-)
This is the fully-functional GNU Radio software-defined radio (SDR) implementation of a LoRa transceiver with all the necessary receiver components to operate correctly even at very low SNRs. This ...
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