LoRa via QO-100

  • I think it's a matter of sematics or legal definitions:

    Encoding is for maintaining data usability and can be reversed by employing the same algorithm that encoded the content, i.e. no key is used.

    Encryption is for maintaining data confidentiality and requires the use of a key (kept secret) in order to return to plaintext.

    (from https://hackercombat.com/forum…g-encryption-and-hashing/)


    Encoding is done all the time in any digimode (just using ASCII format is a way of encoding) which encryption is restricted to satellite telecommand in the hamradio community.


    This definition (if you unwind it even more) is totally compliant with the general idea of hamradio: being open and transparent to anybody.

  • LoRA - APRS via QO-100 talk from OE3DMB at HAM RADIOnline 2020



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    Andreas OE3DMB , thanks for this very nice presentation!


    just some small remarks:


    - After extensive discussions with our counterparts in DARC and others, we came to the conclusion that -as things stay today- LoRA would be legal in Germany (see also earlier message in this thread).


    - Use of LoRA on the WB Transponder:


    Indeed we want to encourage development of new technologies on the QO-100 transponders as long as they fit to some basic requirements.

    • Experiments using unusual modes (for example ranging or LoRa) should use the lower 1.5 MHz of the “Wide and Narrow DATV” Segment. See also https://wiki.batc.org.uk/image…-100_WB_Bandplan_V2.0.pdf
    • Due to the very large number of potential users, all transmitting stations should monitor the wideband spectrum monitor and the co-ordination chat window that has been established by AMSAT-DL and the BATC at https://eshail.batc.org.uk/wb/


    Again, thanks for your achievements and first demonstration of LoRa via QO-100


    73s Peter DB2OS

  • Hi all,


    I would like to test LoRa on QO-100... I know LoRa is not an open protocol, but it might be good to test these low bandwidth long range devices.


    e.g. https://www.semtech.com/produc…less-rf/lora-24ghz/sx1280 SX1280 can be the first candidate to test...


    I do have these questions in mind;

    - how dan we easily downconvert the received 10GHz signal to 2.4Ghz for reception

    - what will be the effect of latency (~1second) for a LoRa transceiver

    - Can we transpond very weak LoRa signals over QO-100 (if we can reach the transponder with a certain level I guess yes, but what is that level?)



    73's de OH2UDS / TA7W

    Baris