A Fatal Error Inspired a Plan to Reduce Friendly Fire

Re:A Fatal Error Inspired a Plan to Reduce Friendly Fire by girvo on Friday April 02, 2021 @09:48AM (#26671372)

I think they mean “relatively” low frequency. Militaries stick to higher frequency bands to ostensibly make it harder for non-state actors and non-peer foes to use or modify COTS equipment or build their own to intercept it.

But yeah, even 13.5ghz would be subject to interference. Though the 35+ ghz the other companies are looking at sound even worse. They must know something we don’t, I think

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Re:A Fatal Error Inspired a Plan to Reduce Friendly Fire by datameta on Friday April 02, 2021 @12:29PM (#26672934)

Perhaps those freqs allow more compact beamforming? Putting aside that I'm not privy to those companies' research I would bet on LoRa (or another sub-GHz low power modulation technique) coupled with crypto coprocessors. Super low-cost (crypto chip being the majority of the BOM), very long range (over 10km in open ares), highly secure. One downside would be low bitrate (.3 ~ 30kbits/s). With a worst case of maximum range and spread factor, even 37 bytes should be enough to trade unique signatures

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