Hi David,
I've watched with interest your recent foray into FreeDV data transmission.
There's a new and interesting project called HNAP (https://hnap.de ) which has
the same goals (long distance IP links). The project is well described in this
year's SDRA talk by Lukas O.
Inspired by both your project and theirs, I wrote a 4FSK data mode which has
the following characteristics:
- 100 kbaud, 1/2 convolutional code
- fits in a 200 kHz channel on the 70 cm and 23 cm bands (IARU region 1
allocations)
- full duplex
- works with 50 watt FM amplifiers
- good SNR performance, 20 km point to point access distance tested with small
non-directional antennas
- carries layer 2 (Ethernet) frames
Do you have anything planned for VHF as well?
Best regards,
Adrian
_______________________________________________
Freetel-codec2 mailing list
Freetel-codec2@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/freetel-codec2
