WirelessTransmission
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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.
Amimon demos prototype wireless 3D HD transmission system
Amimon -- remember those guys? The company responsible for transmitting 1080p video over a 5GHz band went (nearly) radio silent after making a few announcements at CES this year, but now it's hitting back with a new prototype system designed to support the bandwagon that James Cameron and company are driving forward. The new setup is capable of wirelessly transmitting 3D HD video using WHDI (5GHz), with the demo showing that 1080p 3D video could be beamed with a frame rate of 24fps without any major hiccups. For now, the system consists of a board for transmitting the signals and a board for receiving, with the both of 'em equipped with Amimon's digital baseband chip and RF transceiver. We're told that a shipping product is just a logo away, but we've no clue whether or not the first devices will be kits for outfitting existing televisions or new HDTVs with wireless 3D HD support baked right in.
Microring transmissions are sure to resonate with people who hate wires
You've probably seen sketches like the one above promising you complete cable independence since what, 1996? We're not about to tell you this is the one technology that finally delivers on that utopian dream, but it's surely one of the zanier attempts at it. By converting "ultra fast laser pulses" into radio frequency waves, the researchers claim they've overcome a significant hurdle to making wireless communications ubiquitous -- signal interference. The rapid (each laser burst lasts a mere 100 femtoseconds), pulsing nature of their approach purportedly makes their signal extremely robust, while intended operation at around 60GHz means their microring transmitters (diagram after the break) will be able to operate within spectrum space that does not require a license -- neither from the FCC nor internationally. Applications for the microrings would include things like HDTV broadcasts and piping data into vehicles, although we won't be seeing anything happening on the commercial front for at least another five years. Typical. If you just can't wait that long, a few Japanese companies you may have heard of are preparing their own 60GHz wireless devices for the second half of this year.
