I wish they'd chill on the release schedule and keep it to once a week or less. I keep it maintained in my Gentoo overlay but oftentimes when I go to bump it, they push another release. Since this submission was posted they've had yet another new release.
For the most part they use the same or lower frequencies. N71 (600mhz) is lower than any of the 2G/3G bands and requires less cell density than 3G (UMTS/WCDMA) did.
> 5G infrastructure isn’t limited to tall easily visible radio towers like 4G and before;
Nor were earlier technologies. DAS systems get used in large buildings/cities and were done with 4G as well. Small cells and femtocells have been a thing since at least 3G era.
> 5G transmitters are small and relatively inexpensive, making them very common.
Transmitter cost wasn't the primary limitation before, the options for unlicensed/lightly-licensed spectrum were low before and the standards weren't really designed to use them as primary carrier until NR. Also you had to run way more components to run earlier technologies, the stack is just smaller for a NR deploy.
It was my comment. I deleted it, but I was surprised to see the ghost of my comment.
Deleted it because it was a shallow complaint about LoRa being proprietary. However, looking closer, it's not that bad. The physical layer is unavailable, but the link layer protocol spec is downloadable by anyone. Meanwhile, DASH7, an open-source alternative, requires you to be accepted into the alliance before letting you download the spec. Might be a simple thing, but they do advise requesting membership with a company or university email.
Meshcore isn't, the firmwares are proprietary. Meshtastic is, but they whine about trademark stuff all the time and cry when anyone mentions Meshcore in their channels. LoRa radios themselves are all proprietary Semtech turf. I guess it's possible to run over 2.4ghz but the range predictably sucks compared to 900mhz.
I'll ask people, because I'm in the right circles. I want to know where it works. I've been VERY clear in my messaging to HN (on the RCS issue and having ear blown out by iPhone last week) that I am not going to glaze Apple even if the new modems they built interest me. They are usually sort of a neutral to me that has me more pissed off in the recent months than usual. Maybe send me one of your new devices if you don't want me pissed off anymore.
As for this location stuff, I'm curious though into how this works and how Apple (and BOOST/DISH) somehow prevent it happening when the big 3 in the US don't. We all know Apple would have complete control over the modem they designed, that's not a surprise. T-Mobile at least it's possible to stay NR-SA connected, it's apparently not a feature limited to SA like resistance to IMSI catchers are. Is this an OpenRAN feature, which Boost uses?
At least in the past, towers had a piece of equipment called a LMU that is sometimes installed separately from the radio equipment and it's used for measuring the timing advance to triangulate where a device may be for 911. Here's a reddit thread I started years ago for a KML of all the T-Mobile LMU installs in the NYC market: https://www.reddit.com/r/cellmapper/comments/hq2h7u/kml_of_a... (I just found it leaked, it's not online anymore probably). An FCC doc on LMU's: https://transition.fcc.gov/pshs/services/911-services/enhanc... (this is all old tech now, we're doing LTE/NR now in 99.9% of circumstances in the US)
I have an acurite 5in1 weather station running on eneloops/laddas. It whines about the batteries being low but runs for about a month in any conditions. I just rotate and recharge them at the start of the month.
> A friend told me once that his mouse stops working when someone is using the microwave. His room was on the backside of the kitchen.
I had to disable a 2.4ghz access point a couple years ago because a bathroom had a passive IR detector for the light switch that would never let the light shutoff. Because detecting IR is a pretty weak signal, I guess these switches amplify it. The issue is the circuit also acts as a weak antenna for 2.4ghz and thinks its seeing IR when it's actually just amplifying and seeing the 2.4ghz beacon signal.
RF gets weird. Something I've thought about over the years is how my FM radios at my old house would sometimes pick up aviation radio which should be AM well above a tuned FM frequency. Apparently this is due to the common design being a superheterodyne receiver which comes with a few quirks (such as causing some small interference itself when it's receiving).
If you strum an electric guitar and let the hertz of the string fall through the range of AM radio the amp will briefly pickup AM radio stations. Not that you can decipher anything but you recognize voices as it travels past the station.
That's not because of the frequency of the guitar but because the guitar functions as a very nice antenna (long piece of metal (the strong) + a coil forming a tuned circuit), what happens is that your hands create a very temporary partial diode where you touch the strings!
Such naturally occurring diodes are an interesting phenomenon (in this case: the salt in your sweat interacting with the steel of the strings) and were the basis of the very first radio receivers after the 'Coherer' (which is a word that has fallen out of use so far that it registers as a spelling error on my browser!).
How so? A guitar doesn't go past a few kHz (the highest string is IIRC 660 Hz, and the top fret is 660*4) and AM long wave radio—which is almost dead—starts around 120 kHz.
It’s only “other” at the very last point. Go earlier in the track and it shows as “ADS-B”, but every historical real flight in this plane is MLAT (it doesn’t broadcast its precise position but it can be inferred from receivers)
Possibly, but there's no-compete clauses (which are hard to enforce), plus these are mostly managers, not engineers, definitely not engineers that have the deeper knowledge of the systems.
But even the knowledge on its own is enough - after all, a lot of that is in published scientific papers already. ASML works because they combined everything. China can't just build a copy of their EUV machines without also having a copy of their suppliers.
Nah, worst that can happen is you get arrested if you try to go back or are in a country with an extradition policy, but that's only if it's considered a criminal case (e.g. espionage instead of no-compete) or there's a warrant out, else a no-compete clause is a civil matter.
And besides, while in the Netherlands people do sign no-compete clauses, in practice they're not enforceable by law. Or so I've heard.
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