What do you think about this airline vs 5G brouhaha?

Brandon Martin lists.nanog at monmotha.net
Wed Jan 19 00:58:03 UTC 2022

On 01/18/2022 19:48, Jay Hennigan wrote:
> Intentional broadband jamming isn't going to be very effective against 
> an airplane as the jammer would need to be directly beneath a fast 
> moving target and get the timing exactly right with microsecond accuracy.

Just to clarify, I wasn't referring to intentional (and naive) "jammers" 
that simply attempt to disable a system, here, but rather using a more 
academic notion of the concept to refer to a 5G NR system acting in an 
unintentional context with the same outcome similar to how one might 
consider modern OFDM-based WiFi a "jammer" to a conventional narrowband 
communication system operating on the same or a nearby carrier frequency 
like the classic Bluetooth PHY.

5G NR is (or should be, from what I know of it and its relation to other 
OFDM systems) a pretty broad-band, flat-spectrum PHY operating at only 
moderate power and for essentially infinite duration in the scope of a 
radar receiver.  It would by no means be an ideal means to disable such 
a system, but it does represent RF energy that the receiver needs to 
contend with.

Brandon Martin

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