Congratulations to OE3DMB for the first successful LoRa-Transmission via QO-100.
see this article: https://aprs.at/index.php/2020…a-aprs-via-qo-100-oe3dmb/
Unfortunately we also have some conflicting interests here.
The LoRa transmission on the NB was with 125 kHz wide bandwidth, which exceeds the maximum bandwidth of 2.7 kHz by a factor of 50 !! Some kind of early notification and coordination should have been a good idea.
In fact we have noticed the (weak) noise band on the transponder at some stage...
On the good side, the author already relativized his experiments in a final statement, which I feel is important too.
But there is a another critical issue:
The LoRa physical layer protocol is proprietary; therefore, there is no freely available official documentation and you are depending on the LoRa-chips (or licensed) from Semtech.
Per sé that means we are not allowed to officially use LoRa on amateur radio frequencies.
I understand there is some usage already, but I guess it's operated under general ISM regulation, as it uses or share the same frequencies with ours... A kind of grey zone...
I was already thinking about using LoRa for another (yet undisclosed) AMSAT satellite project discussion in 2018, but already had some ideas in mind because some variants of LoRA chips support 800-900 MHz and could be directly connected to the LNB for receiving. For transmitting the new AMSAT-DL UpCon6W would also fit perfectly..
If we would uplink LoRa from Bochum, it would be possible to receive data packets just with an LNB without any dish!
We could discuss more of those ideas here, but the above "legal" topic is currently more important and we need to this solve first...
So if someone is having any background about the "proprietary" part of LoRa and how to legally deal with it inside of our amateur radio and amateur radio over satellite service, I would be grateful..