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by giuliomagnifico 1273 days ago
The best fact about this, is that it is a technology that was "thinked" in 1940s by a woman: Hedy Lamarr > https://wyldnetworks.com/blog/hedy-lamarr-frequency-hopping-...
2 comments
sph 1273 days ago
The more interesting fact is not that she was a woman, but she was an accomplished Hollywood actress with no formal training that went on to invent the channel-hopping technology used in Wifi, Bluetooth and military radar installations, among other inventions.
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wheybags 1273 days ago
And she's also a headcrab. A true polymath.
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nier 1272 days ago
Which dictionary does one need to consult for a positive definition of headcrab?
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debugnik 1272 days ago
Lamarr is the name of a crab-like alien pet in the game Half Life 2, its species known as headcrab.
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lxgr 1272 days ago
Modern 802.11 versions don‘t really use spread-spectrum anymore (neither FHSS, which is used by some versions of Bluetooth, nor DSSS, which was used in the original 802.11 and up to 802.11b), but rather OFDM on fixed carrier frequencies.

Switching channels due to DFS is not "frequency hopping" in that sense – that would be many orders of magnitude faster.

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