This is a build I did on a Raspberry Pi to receive NOAA weather satellite signals and process them into images on a Raspberry Pi 3 Model B. The satellite reception is done with a NooElec SDR dongle and a QFH antenna.

All of the SDR reception and image processing is done on the Raspberry Pi, and it is completely automated. Once it is set up, you don’t need to touch it (other than to download your images).

Instructable:
https://www.instructables.com/id/Raspberry-Pi-NOAA-Weather-Satellite-Receiver/

We explore how dipoles work and how to build them, and how we built our final double cross antenna. We used an SDR (software defined radio) called a HackRF to do the work of interpreting the received signals and then decoded them with some special software. We pulled images from 4 satellites: NOAA 15, 18 and 19 as well as METEOR M2. The satellites broadcast immediately as they take the images and no images are stored, so we’re likely the only ones on earth with these images.

Receiving Images From Satellites Part 2: Decoding and Demodulating NOAA and METEOR Transmissions
https://www.youtube.com/watch?v=L3ftfGag7D8

In a previous video we looked at how it was possible to receive images directly off of weather satellites as they pass overhead. In this video we look at the last steps of that process and how we can convert our audio recordings into beautiful images of the earth.For the purposes of this video, we only use tools that have a gui.

software to decode APT and WEFAX signals from weather satellites
https://wxtoimgrestored.xyz/

Drew Brashler of dBBaudio.com stops by MUSIC Group Studios to demonstrate how to setup Digital Stage Boxes for portable Church applications with the X32 Digital Console. This section covers connecting the X32 to the SD8/SD16 Digital Stage Boxes using a shielded CAT5 cable.

Utilizing Digital Stage Boxes for Portable Church Application (Part 2 of 2)
https://www.youtube.com/watch?v=q1PTXxaFwmg

Drew Brashler of dBBaudio.com stops by MUSIC Group Studios to demonstrate how to setup Digital Stage Boxes for portable Church applications with the X32 Digital Console. In this section we cover routing signal to your digital stage boxes.

We show you how to build a “digital data sender” with a simple radio transmitter and receiver. Paul builds, assembles and tests the setup in this one video.

Data can be two way or one way. Any sort of data can be sent , Files, Video, Audio, WebPages etc.
Make a transmitter and you have your very own broadcast station.

Features:
Speeds up to 400kbs with a sound card.
QAM16 and QAM64
Eight state TCM encoding.
Between 1% and 50% Interleaved RS forward error correction.
Blind equalization, frequency tracking.
Blind carrier frequency and symbol rate detection.
Packet type of data structure.
Able to perform multimedia streaming (sound and video).
Able to send files in continuous rotation with unused bandwidth (sending of web page type content).

We used an SDR (software defined radio) called a HackRF to do the work of interpreting the received signals and then decoded them with some special software. We pulled images from 4 satellites: NOAA 15, 18 and 19 as well as METEOR M2. The satellites broadcast immediately as they take the images and no images are stored

Receiving Images From Passing Weather Satellites (NOAA and METEOR M2) Using a Cheap SDR
https://www.instructables.com/id/Receiving-Images-From-Passing-Weather-Satellites-N/

AI is currently popular, so [Chirs Lam] figured he’d stimulate some interest in amateur radio by using it to pull call signs from radio signals processed using SDR. As you’ll see, the AI did just okay so [Chris] augmented it with an algorithm invented for gene sequencing.

His experiment was simple enough. He picked up a Baofeng handheld radio transceiver to transmit messages containing a call sign and some speech. He then used a 0.5 meter antenna to receive it and a little connecting hardware and a NooElec SDR dongle to get it into his laptop. There he used SDRSharp to process the messages and output a WAV file. He then passed that on to the AI, Google’s Cloud Speech-to-Text service, to convert it to text.

“Make amateur radio cool again”, said Mr Artificial Intelligence.
https://towardsdatascience.com/make-amateur-radio-cool-again-said-mr-artificial-intelligence-36cb32978fb2?gi=2c767f95e8b5

A project on building a speech recognition system for amateur radio communication.

The R820T tuner IC is used in the popular Airspy software defined radio (SDR) as well as many of the inexpensive RTL SDR dongles. [TLeconte] did some experiments on intermediate frequency (IF) configuration of the chip, and you’ll find his results interesting.

Using 5 million samples per second and the device’s real mode, the tests look at a what comes out when the IC reads a noise source.

Playing with the Airspy R820T IF bandwidth
https://tleconte.github.io/R820T/r820IF.html