4 ms·

The fact that spreading factors are orthogonal as well is also pretty impressive. In the ham space other than FT-8 you don't really see a whole lot of interesti

The fact that spreading factors are orthogonal as well is also pretty impressive. In the ham space other than FT-8 you don't really see a whole lot of interesting modulation techniques like you do with LoRa. The fact that it works over ISM bands is pretty neat and you can do some impressive things with just a couple ~$20 AT command based radios.

mytailorisrich 3y ago
> The fact that spreading factors are orthogonal as well is also pretty impressive This has been quite standard for 20+ years. For instance 3G spreading codewords are also orthogonal. If fact, I think LoRa took a lot from mobile/cellular where all those technics have been used for a long time. Edit: As used in 3G, the orthogonal spreading codewords (OVSF) are actually quite simple to generate for a given spreading factor: https://www.mathworks.com/help/comm/ref/ovsfcodegenerator.html https://www.mathworks.com/help/comm/ref/ovsfcodegenerator.ht...