wifisignal
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Aluminum foil can actually improve your wireless signal
If you've ever thought of resorting to aluminum foil to redirect your home's poor WiFi signal, it turns out you're not actually that far off the mark. EurekAlert reported today that researchers at Dartmouth College have discovered that 3D printed signal reflectors, consisting of a thin layer of metal and plastic, can drastically and cheaply improve the wireless signal around a home.
New wireless transmission tech hits 2.56Tbps, leaves WiFi feeling inadequate
Stoked about the gigabit speeds your new 802.11ac WiFi router is pumping out? One group of scientists hailing from NASA's Jet Propulsion Laboratory and universities in the US, Israel and China isn't so impressed, having generated a wireless signal clocking in at 2.56Tbps. Proof of the feat was published in Nature Photonics, which details their use of orbital angular momentum (OAM) to make the magic happen. Current wireless protocols alter the spin angular momentum (SAM) of radio waves to hold info, and by combining both methods the team was able to pack eight data steams into a single signal, resulting in the mouth-watering number noted above. The best part is, applying different levels of OAM twist to SAM-based transmissions theoretically allows an infinite number of streams per signal, meaning seriously increased bandwidth without the need for additional frequency. So far the wireless tests have only been conducted over a measly 1m, but the scientists reckon it'll work at distances up to 1km and that the concept could also be used to boost speeds in existing fiber-optic cables. As with many scientific advances, it's unlikely hardware capable of such speeds will be available any time soon, so 802.11ac will have to suffice... for now.
Copenhagen airport tracks your every move using WiFi signals
Hello, Big Brother! According to the New York Times, Copenhagen International Airport is currently testing a new program that monitors passengers based on WiFi data emitted from devices like laptops and smartphones. Airport officials observe travelers from a remote computer, and can tell, within 10 feet of accuracy, where they spend their time -- those arriving and departing are represented by different colored dots. The program, created by Geneva-based SITA, also gives visitors the option to download an iPhone app that provides location-based information, like promotions from nearby restaurants. SITA's VP said the software isn't intrusive, as it follows devices, not individuals, but we're not sure we want anyone to know how long our Android spends in the bathroom -- and you thought those naughty-bit scanners were creepy.
