HATS (Home Amateur Telephony Service)
This project was initially started to satisfy my curiosity regarding the study of old trunked radio systems.
And soon, a desire arose to connect it with VoIP, experiment, and see how it could be used in today.
I've developed some simple, auxiliary software, but unfortunately nothing good came of it...
And after thinking a bit over, I decided to to start the HATS project...
The software/hardware kit that arrange packet communication over radio and integration with VoIP.
It immediately splits into two direction:
-
Narrow-band
Designed to operate in a 3kHz bandwidth, ensuring compatibility with regular amateur radio equipment.
Such as: Baofeng UV-5R / UV-82, ICOM FR-3000/FR-4000 or Kenwood TKR-720 and so on.
Provides data transfer (packet mode) and operate in half-duplex mode.
Some parts available on GitHUB. -
Wide-band
Designed to operate with wideband (100Kz-10Mhz), caring media streams, tv and so on.
This branch also goes in two directions: ready-made modules and homemade SDR-modem.
It's also planned to use in the HATV project.
### Narrow-band ###
Turned into the thing for testing ideas and gathering faults.
The wish to get a first working prototype as soon as possible makes me to find some already solution for modulator/demodulator, at that time it was: CMX469.
The first modems (photos below) were based on that IC and STM32F030/STM32F203.
Unfortunately, it wasn't possible to achieve stable communications (the lack of error correction and so on), gave very low results...
So, the next version goes to be a complete software based mod/demod and runs on (STM32F103 / PC)...
todo...
