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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