nanog mailing list archives
Re: What do you think about this airline vs 5G brouhaha?
From: Brandon Martin <lists.nanog () monmotha net>
Date: Tue, 18 Jan 2022 19:58:03 -0500
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
Current thread:
- Re: What do you think about this airline vs 5G brouhaha?, (continued)
- Re: What do you think about this airline vs 5G brouhaha? Mel Beckman (Jan 18)
- Re: What do you think about this airline vs 5G brouhaha? Lady Benjamin Cannon of Glencoe, ASCE (Jan 19)
- Re: What do you think about this airline vs 5G brouhaha? Mike Hammett (Jan 18)
- Re: What do you think about this airline vs 5G brouhaha? Shane Ronan (Jan 18)
- Re: What do you think about this airline vs 5G brouhaha? Brandon Martin (Jan 18)
- Re: What do you think about this airline vs 5G brouhaha? Nick Hilliard (Jan 18)
- Re: What do you think about this airline vs 5G brouhaha? Brandon Martin (Jan 18)
- Re: What do you think about this airline vs 5G brouhaha? Mel Beckman (Jan 18)
- Re: What do you think about this airline vs 5G brouhaha? Brandon Martin (Jan 18)
- Re: What do you think about this airline vs 5G brouhaha? Jay Hennigan (Jan 18)
- Re: What do you think about this airline vs 5G brouhaha? Brandon Martin (Jan 18)
- Re: What do you think about this airline vs 5G brouhaha? Michael Loftis (Jan 18)
- Re: What do you think about this airline vs 5G brouhaha? Brandon Martin (Jan 18)
- Re: What do you think about this airline vs 5G brouhaha? Bryan Fields (Jan 19)
- Re: What do you think about this airline vs 5G brouhaha? Jay Hennigan (Jan 19)
- Re: What do you think about this airline vs 5G brouhaha? Bryan Fields (Jan 20)
- Re: What do you think about this airline vs 5G brouhaha? Scott McGrath (Jan 19)
- Re: What do you think about this airline vs 5G brouhaha? Mel Beckman (Jan 18)
- Re: What do you think about this airline vs 5G brouhaha? Brandon Martin (Jan 18)
- Re: What do you think about this airline vs 5G brouhaha? Masataka Ohta (Jan 19)
- Re: What do you think about this airline vs 5G brouhaha? Brandon Martin (Jan 20)