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16:26
<
whitequark >
huh, 802.11ad achieves up to 7Gbit/s transfer rate over 60GHz band
16:27
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16:27
<
whitequark >
I wonder if it penetrates concrete walls? 2.4 is already bad at it.
16:28
<
whitequark >
"yea, here is your seven gigabit connection... by the way, do you live in a studio?"
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<
whitequark >
"no? nevermind then"
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16:29
<
lekernel >
can we hack the transceivers to make nice synthetic aperture radars?
16:29
<
whitequark >
lekernel: I believe that by 2014, obtaining an SDR will be even easier than it is now
16:32
<
lekernel >
yeah - first non-sucky and funded kickstarter project I've seen
16:32
<
whitequark >
indeed. (well, I won't be so critical but yes, these guys know what they're doing.)
16:38
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<
lindi- >
whitequark: SDR that can record all that sounds tricky
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<
whitequark >
lindi-: all what?
16:40
<
lindi- >
whitequark: 7 Gbit/s
16:42
<
whitequark >
lindi-: right... but you don't need that for a radar?
16:42
<
lindi- >
whitequark: nope but for debugging wlan that would be nice
16:43
<
whitequark >
sure... I wonder what the wlan devs are using
16:43
<
whitequark >
something insanely expensive from a major test equipment vendor, I suppose
16:43
<
larsc >
whitequark: well easy, but a repeater in every room ;)
16:44
<
whitequark >
larsc: that kinda breaks the whole idea of "wireless"
16:44
<
whitequark >
people VERY dislike drilling holes in their walls, much less making channels.
16:44
<
larsc >
who cares what people like or not?
16:45
<
larsc >
'Also, oxygen molecules begin to absorb electromagnetic energy at this frequency;'
16:45
<
lekernel >
yeah, NVIDIA has 5Gbps/pin DRAM, 802.11ad have ADC/DACs that can be used to build a 7Gbps modem, countless SoC makers have embedded CPUs that run at 2+GHz, meanwhile we're stuck with slowtan6 FPGAs that choke running a CPU at 83MHz, have 1Gbps IOs that are a royal pain to use, and commercially available ADC/DACs are typically <= 1Gsps
16:45
<
lekernel >
this is kinda frustrating
16:46
<
larsc >
'Both the WirelessHD and WiGig camps are working on beam-forming algorithms that would focus 60GHz transmissions to alleviate the range issue.'
16:46
<
lindi- >
btw, a few weeks ago I was googling and trying to an open source solution for receiving OOK signals with SDR. surprisingly I wasn't able to find anything that'd try to lock to the timing signal and decode the bits automatically
16:46
<
whitequark >
reliability hell
16:46
<
larsc >
oh and 'wall-mounted reflectors'
16:47
<
lindi- >
of course I can write that in a few lines of C but I was bit surprised that such a basic block would not exist
16:49
* whitequark
is reading about X.25
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16:49
<
whitequark >
X.25 provides a set of user facilities defined and described in ITU-T Recommendation X.2.[34] The X.2 user facilities fall into five categories:
16:49
<
whitequark >
essential facilities;
16:49
<
whitequark >
additional facilities;
16:49
<
whitequark >
conditional facilities;
16:49
<
whitequark >
seems like a horrible case of 'design by committee'
16:49
<
whitequark >
mandatory facilities; and,
16:49
<
whitequark >
optional facilities.
16:51
<
lekernel >
who still uses x.25?
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<
lekernel >
larsc, this sounds fun. can you make a plasma gun with a high-energy 60Ghz source?
16:53
<
whitequark >
lekernel: for educational/historic purposes
16:53
<
lekernel >
s/energy/power
16:53
<
qi-bot >
lekernel meant: "larsc, this sounds fun. can you make a plasma gun with a high-power 60Ghz source?"
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<
larsc >
lekernel: we'll see ;)
17:01
<
larsc >
on the other hand can you make a microwave oven using a 2.4GHz router?
17:03
<
lekernel >
well, with 10000x 2.4GHz routers ;) for this sort of power at 60GHz you'd use a gyrotron
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