What’s your evidence, Richard Easton??!?
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This is 1874! You’ll be able to sue HER!
Wifi doesn’t use frequency hopping. That’s bluetooth.
https://www.ieee802.org/11/Documents/DocumentArchives/1996_docs/1196049D_scan.pdf
Frequency Hopping Spread Spectrum PHY of the 802.11 Wireless LAN Standard
Edit: [email protected] is correct. FHSS was quickly dropped for DSSS and OFDM, and FHSS is not used in any modern WiFi specs. You can see the list in table 7.6 here https://www.pearsonitcertification.com/articles/article.aspx?p=1329709&seqNum=4
But that’s not part of 802.11n or 802.11g or “a” or what we call “Wifi”… 802.11 in itself is a pretty long standard, including all kinds of different things.
I am not literally a part of my kids, but they wouldn’t be here without me.
It actually is. The original standard published by the IEEE 802.11 group was 802.11, often referred to as 802.11 prime.
To put it simply, it was little more than a proof of concept. The only wireless cards that I know were made at that time, were very expensive and only purchased in very limited amounts by large corporations. Quickly afterwards it was replaced by 802.11a and 802.11b. the big difference between the two, was that b used 2.4ghz and could achieve 11mbps, while a used 5Ghz, and could achieve 54mbps.
Meanwhile prime was on 900mhz and if memory serves, never achieved more than a few Mbps.
802.11b was more popular because 2.4ghz was easier to make inexpensively at the time, and so 802.11g also used 2.4ghz, but was able to increase bandwidth by using OFDM. But now I’m off topic, I just find wireless history very interesting.
The point is 802.11 (prime) was a valid wireless standard.
but still, without frequency hopping no 802.11, without 802.11 no wifi
It may be dropped, but it was used in the beginning
Wouldn’t that not still make her the mother of Wifi?
Hehehe, you can call her the mother of early 802.11 and Bluetooth.
For the Bluetooth development, the developers of the technology didn’t know about her patent until their IP department was about to file for a patent. They added this patent to the list and then they got connected. As is the case with many, patent and patent connections. It’s a quite common way of how patents are connected, and part of the IP industry. R&D people come up with an idea, these people don’t read tons of patents but solve issues in an intuitive way. Then IP lawers dig into existing patents and make the legal connections.
that’s not how it works. edit: others pointed it out already it seems. you would still call the inventor of a first car the father lf cars even though it has nothing to do with modern cars
edit2: but considering that she didn’t really invent wifi, just frequency hopping, I would maybe call her grandmother or something
She didn’t invent frequency hopping, Nicola Tesla did. She invented a system that used a piano roll (from a player piano) to alternate frequencies. Also she shared the patent with another person.
Or rather she was part of a team, with her husband and one more, that patented that idea, never really got it to work in real torpedos, and the technology was forgotten until someone referred to it in a later patent. Then her role as background got expanded to take the role of other more influential women, maybe because she had a nicer picture.
Yeah, I think I get it. I mean the analogy is a bit flawed. What she invented is that alike synchronizing the rolls of player pianos, you could build a mechanism that hops frequencies (instead of piano keys) to make remote controlling torpedos resilient against jamming.
Idk. To me it feels like calling the inventor of three-wheeled vehicles the father/mother of cars, if we want to stay with that analogy. It’s remotely related, not an integral part and nowadays solved differently. But the first car was a tricycle. (Benz Patent-Motorwagen)
But I don’t want to invalidate her achievements either… It’s one (important) contribution to technology. And it’s not always that one single person invents the whole concept of a radio. Or a car. And get’s to be the whole parent of it. Things build upon each other. Sometimes it needs a lot of contributions of several individuals to make something possible… Nowadays more so than in the old times.
Just chiming in as a network tech that deals with these terms regularly.
802.11, sometimes called 802.11 prime, to differentiate the first protocol from the 802.11 (WiFi) group. This protocol was not really every in widespread use. A few early niche cases, but it was quickly supplanted by 802.11a and 802.11b.
The b standard was one of the first major WiFi versions to see adoption, which used DSSS, or direct sequence spread spectrum. Which fell by the wayside because OFDM was faster and more efficient, which led wifi speed increases from 802.11g, through wifi 4 (802.11n), WiFi 5 (802.11ac), and WiFi 6 (802.11ax). The more recent versions use QAM (wireless N+), which augments OFDM with amplitude modulation.
Beyond QAM, speed improvements at this point are minimal and usually require wider channel widths to get any significant improvement, so 802.11 has focused on multiple access improvements and since 802.11ac, have been making improvements to MIMO. They started with SU-MIMO, then one-way MU-MIMO, then two way MU-MIMO.
I haven’t read up on the changes in WiFi 7 yet beyond 6Ghz being added. I’ll look into it after it’s been fully ratified.
Long story short, they moved to 5Ghz and eventually 6Ghz, because there isn’t enough channel width in 2.4 for WiFi 5, and 5ghz was getting a bit difficult to sustain for the speed they’re trying to hit, so 6Ghz is the next logical step.
Woman make thing!? Me no likely! Woke lie!
Fucking troglodytes.
Seems to be more than that to his question though
https://lemmy.world/comment/9701067
Plus the child comment seems relevant
There are plenty of women in STEM who deserve more recognition. Lise Meitner, discovered nuclear fission. Gladys West, came up with the theory that laid the groundwork for GPS. Grace Hopper, inventor of the program linker, without which modern software development would be impossible. Ada Lovelace, arguably the first programmer ever. But calling a woman whose name is one of two on a patent that furthered the development of a radio communication technique originally devised 40 years earlier by Nikola Tesla which Wi-Fi no longer uses “the mother of Wi-Fi” and putting her on a pedestal just because she’s a woman, parading her (and only her) around every Women’s History Month, and calling anyone who claims she didn’t actually invent Wi-Fi (because she died around the time of its creation) a “troglodyte” is not a good look.
Whoa, mate! That’s too many facts! We don’t like facts here!
Fire up the ROFL-copter, we got a live one.
There is a great documentary about her on Netflix. It covers her love of science and her attempts to get her design to the military for the war effort.
Seems there’s more than one. Take your pick
https://www.youtube.com/results?search_query=hedy+lamar+patent+documentary
Blue check…
much verified
She took on where Heinrich Hertz left off, and made it to the top of the Tinseltown heap!
C’mon… you know you wanna see a musical on the life of Heinrich Hertz.Considering the man spent over a year working in a blacked-out room, trying to detect the faint spark of electricity transmitted wirelessly, it’s gonna have a song or three about fumbling or stumbling in the dark.
Considering the man spent over a year working in a blacked-out room, trying to detect the faint spark of electricity transmitted wirelessly, it’s gonna have a song or three about fumbling or stumbling in the dark.
Bruce Springsteen has you covered with “Dancing in the Dark”.
The headcrab Kleiner keeps as a pet in HL2 was named after her!
Whoa, cool! (Huge fan of the games here and didn’t know that)
A bit dark humor-wise lol… Heady, the defanged headcrab 😬
Note that this frequency hopping is no longer used in most WiFi networks today. It is, however, critical to classic Bluetooth, and BLE still somewhat uses it. I have no idea how it’s related to GPS.
Time splitting is just lazy frequency hopping, change my mind
Can two devices transmit at exactly the same time with time splitting?
From a human perspective, yes, that’s exactly what it does
If you want to get pedantic about the technical details, it’s not time splitting if you’re not splitting the time…
Technically speaking, isn’t differentiating between any two things pedantic? For example the moon, and chocolate, both are things. If you don’t want to get pedantic about it.
What I mean is if you don’t slice time into slots, you’re not using time slicing. It doesn’t make sense to talk about time slicing at all anymore
Two devices can transmit at the same time with all sorts of setups, even on the same frequency. And it’s not inaccurate to describe time slicing as “a method to allow multiple devices to transmit and receive simultaneously”
The question isn’t valid. Being truly pedantic would be pointing out that any number of devices can transmit at the same time, you didn’t say the messages would be received
Frequency hopping in wifi was never well supported. 802.11a was primarily DSSS and afaik, very few, if any consumer devices supported the FHSS mode.
Indeed. Just speaking from a signals point of view, frequency hopping is not competitive for high bandwidth applications. It is however surprisingly durable in the presence of interference despite its simplicity. We’re seeing this play out in newer Bluetooth standards.
Isn’t it still extensively used for RC stuff like drones and model aeroplanes / cars though? Asking as an amateur.
It very much is! It’s widely touted as a safety feature, since interference on one frequency means you wont lose control of the flying blender for more than a few milliseconds (well, usually…)
Yes. It works well because this is an application that requires low bandwidth, and interference could cause you to lose control and is even expected with multiple operators in the vicinity. You definitely want to have resilience to other interfering signals.
https://patents.google.com/patent/US2292387A/en
For anyone else curious about this patent.
Our mother who art in WiFi
Thy beacon come
Thou handshake be done
In ac as in 802.11Give us this day our daily bandwidth,
And forgive us our connectivity issues,
As we forgive those who disrupt our signal.802.11ac
pfft gtfo of here we’re gearing up for a war.
LAN SENSING WALL PENETRATING XRAYS BABY! GOOOO 802.11bf
coming soon to an ISP near you
ACK
Let me tempt you with some SYN
No thanks, I’m FIN.
SYN-ACK
RST
That’s “Hedley.”
What are you worried about? This is 1874…you’ll be able to sue her.
This is 1874…you’ll be able to sue her.
By fax!
I can’t believe I had to scroll down this far to see a Blazing Saddles reference.
HARUMPH!
Great to recognise this invention.
I was surprised by the choice of ‘Mother of Wi-Fi’ though - Wi-Fi hasn’t used ‘frequency hopping’ as such since 802.11b was released back in 1999 - so very few people will have ever used frequency-hopping Wi-Fi.
GPS only uses it in some extreme cases I think, but I’m not an expert.
However, Bluetooth absolutely does depend on it to function in most situations, so ‘Mother of Bluetooth’ might have been more appropriate.
So her invention isn’t used for Wifi now, but was used in the initial design of it? You might even say she helped give birth to it…
Yeah but her work built on someone else’s so we’re taking it all away from her and calling them parents of her work so she gets nothing…
Doesn’t feel as fun anymore, does it?
Let the guys dad have some credit for his work, give her credit for her work - I don’t get what’s so controversial.
I guess my point is that it isn’t a particularly important part of the design of Wi-Fi - they included it in the very first iteration in 1997 and realised by 1999 they didn’t need it. Therefore Wi-Fi would likely have been born regardless of the invention; Bluetooth would not.
Before 802.11b though?
Uh I don’t think there was Wifi before that
802.11: am I a joke to you
However, Bluetooth absolutely does depend on it to function in most situations, so ‘Mother of Bluetooth’ might have been more appropriate.
Considering the namesake of Bluetooth, the “Mother of Bluetooth” sounds like the kind of person who would have a tea party with “Grendel’s Mother” from Beowulf.
Wait til he finds out that the first computer programs were written by some poet with daddy issues
Least sexist blue check
