nanog mailing list archives
Re: What do you think about this airline vs 5G brouhaha?
From: Brandon Martin <lists.nanog () monmotha net>
Date: Wed, 19 Jan 2022 01:19:53 -0500
On 1/19/22 12:28 AM, Masataka Ohta wrote:
Digital technology can not be useful when RF stage is saturated,which is why a patent to avoid saturation was essential for CDMA.
Completely overloading the receiver frontend will of course render any kind of modulation or coding gain irrelevant, yes.
However, as long as your receiver still has adequate dynamic range to receive "everything that's there", effective gain via spread spectrum, FEC, etc. can be on the order of 20-30dB compared to a naive narrowband system operating at similar power when faced with a "jammer" within your RF receive mask, which is what I was getting at.
In this case, however, the system is basically a dumb radar, apparently, so none of that is going to be present. The fact that a signal 250MHz out of band can present meaningful issues is troubling nonetheless.
-- 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? 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? 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)
- Re: What do you think about this airline vs 5G brouhaha? Jay Hennigan (Jan 21)
- Re: What do you think about this airline vs 5G brouhaha? Michael Thomas (Jan 21)
- Re: What do you think about this airline vs 5G brouhaha? Mel Beckman (Jan 21)
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- Re: What do you think about this airline vs 5G brouhaha? Mel Beckman (Jan 21)
- Re: What do you think about this airline vs 5G brouhaha? Masataka Ohta (Jan 18)