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Wi-Fi World Record
supersam writes "Interline Wireless Technology, a Polish company has reportedly set a world record in stretching the range of a Wi-Fi network for an amazing 110 Kms at 2.4 GHz. They achieved this using an antenna developed by them and an INTEL Pro/Wireless 2011 Access Point."
Here's a translation of the distance. The 2.4 GHz refers to the frequency used (similar to a cordless phone).
666-607: 6th floor apartment of the beast
Ok, thanks.
Hmm... I should take some CS too...
Is this a joke?
The speed of the signal is the speed of light.
The frequency of the signal is 2.4GHz
The distance the signal was received at was 110Km
The wavelength was 299 792 458/2 400 000
= 124.913524m
I take it you never did any physics then
"Taligent is still pure vapor. Maybe they'll be the last who jumps up on Openstep... "
I was actually confused by the "Kms" notation. Never seen that before... Kilometers shouldn't be "Kms", just like meters shouldn't be "ms"...
Beware: In C++, your friends can see your privates!
Exactly what does this mean? It doesn't make much sense to a non-techie like me :)
The shiney dishey pointey things let the silly men send naughty pictures a long way through the air magically.
Do not look at laser with remaining good eye.
Oh! I never knew Kentarians liked garlic so much.
Be nice to people on the way up. You will meet them again on your way down!
"True, picking the signal out from the noise at more than 50ft is proving problematic at present," quoth the parent.
We're not "Kentarians" we're either "Men of Kent" on the french side of the Medway River, or "Kentish Men" on the London side. Strangely, although Men of Kents' language is different to the folk of Calais, our accent is very similar...
need a free COBOL editor for Windows?
That wasn't me, and yeah I messed it up as well. It was should have been 2.4 Ghz not 2.4 Mhz
"Taligent is still pure vapor. Maybe they'll be the last who jumps up on Openstep... "
Yeah your right
Guess I shouldn't try to correct people when I don't know and maths
"Taligent is still pure vapor. Maybe they'll be the last who jumps up on Openstep... "
Read the article... It's 110 km @ 2.4 Ghz.
Or English either it seems
"Taligent is still pure vapor. Maybe they'll be the last who jumps up on Openstep... "
Metric units of 110km, not 110 Kms, the lamer. km is a abbreviation of KiloMeters, not KiloMeter, so the s should be left out entirely, and if you are going to capitalize the K, you better capitalize the m. it's better to just leave them both at no caps.
so 110 km at 2.4GHz. 2.4GHz is superflous, we know they wouldn't be using anything else for that range, so it would have been better to just say 10km!
Idiots!
"And we have seen and do testify that the Father sent the Son to be the Savior of the World"
1 John 4:14
Football fields are confusing, they are typically used for area measurements. For things like the distance it is better to use a two-level pseudo-measurement system, for example; All the people in New York standing on each others shoulders would... and so on. Then we get two odd units (population of new york and the average height for a person in new york. Doubling the confusion in the name of explaining things for the daft ;)
according to this, the avg heigh of a human, in 1996, was 70.1 inches.
...
google tells me that 1 inches = 0.0254 meters.
population of new york city is 8,008,278 people (in 2000).
so we have 8,008,278 people * 70.1 inches * 0.0254 = 14,259,059.31012 metres
so, sadly, thats 14,259.059 km, which is a lot more than the wifi run.
cheers.
We emerge from our mother's womb an unformatted diskette; our culture formats us. - Douglas Coupland
Yeah. Kelvins per millisecond? Kelvins per meter per second?
We're not "Kentarians" we're either "Men of Kent" on the french side of the Medway River, or "Kentish Men" on the London side
What happened to all the women?
Just to check if I get this right, the wavelength is 12 cm, which means the signal goes up & down every 12 cm and can therefore represent 2 Bit every 12 cm.
The speed is 300km/s (speed of light, not accurate). Which means that we have 2500000 waves / second (300 * 1000 * 100 / 12) which translates to 5000000 Bit / s which would be ~4.7 MBit / second "raw" capacity.
Can anyone please point out any mistakes I might have done? Cheers.
Okay, actually speed of light is 300.000km / s of course and the wavelength is not a complete up/down wave, but only the up or down part of the wave and can therefore only present 1 bit of information.
So, revised calculations:
300.000km/s --> 2 500 000 000 waves/Bit per s --> 2384 MBit per second "raw" capacity.
This somehow looks too high, or is that much lost in error correction & stuff?
Actually you can get more than 2 bits in a 1 wavelength. most wireless equipment today uses 4 or 8 bits per wavelength. (9.4Mbps or 18.8Mbps at that frequency)
All misspellings and grammatical errors in the above post are intentional and part of my artistic expression.
Wow, how does that work? Does the carrier signal which is mapped onto the "base frequency" use a higher frequency than the "base frequency" itself?
err..messup..other way around (carrier signal = base frequency, base frequency = signal carrying the information)..sorry
can you also take a look at my revised calculations, where I got to 2k something mbit/s? can you detect my mistake there?
Funny, I thought everyone South of the Thames was just an "escaped criminal" :p
Ripping an new rectum in the fabric of spacetime.
Never ate a polish buzzard have you?
From excellent karma to terible karma with a single +5 funny post...
We keep them in the kitchen - we wouldn't want them to find out about the Frenchmen or the Londoners... ;)
need a free COBOL editor for Windows?
I thought it was Kitty Money Sodas.
Ok, This is the last time I reply while under the influence... *sad*
"I used to have that really cool,funny sig
It's been a while since I took digital communications, but I believe you can get more than 2 bits per wavelength by using QAM, which plays with the phases to fit more in.
-- How many sigs are as useless as this one?
If we're not talking Wi-Fi specifically, than satellites do 23,000 miles with similar power bandwidth ratios...
You can also use a multiple-level system (the simplest). A four-level system encodes two bits per level change (4bit/cycle), an 8-lvl system = 6 bits/cycle etc.
K/ms would be the only way. That would be interesting, though - what is the heat output versus time of that thing?
No. I don't think you can combine three units like that (temperature over distance AND time?!?). It WOULD be K/ms, or Kelvin/milliseconds.