Engineers Just Smashed Record for Fast Wireless Data Trasmission

The team prepares its transmitter. (Image: Photo Jörg Eisenbeis, KIT)
The team prepares its transmitter. (Image: Photo Jörg Eisenbeis, KIT)

Like the idea downloading the contents of a DVD in less then 10 seconds without a cable in sight? That’s exactly what a team of German engineers can do, having broken the record for wireless data transmission using terrestrial radio signals.

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A team of researchers from the Fraunhofer Institute for Applied Solid State Physics claims to have beaten the previous record for beaming data in this way by a factor of 10. To achieve the feat, they transmitted data on signals in the 71–76 GHz radio frequency band—which is usually used for terrestrial and satellite broadcasting.

But to squeeze in that amount of data requires an impressive signal-to-noise ratio, to avoid having to waste bandwidth on error-correction. So the team built a system of ultra-efficient transmitters and receivers. The transmitters are based on semiconductor chips made gallium-nitride, which provide a high-power signal that’s transmitted from a focussed parabolic antenna.

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The team beamed the signals between a 45-story tower in central Cologne and the Space Observation Radar in Wachtberg, 23 miles away. At the receiver, the researchers used special low-noise amplifiers built using indium-gallium-arsenide transistors. Their sensitivity allows them to detect incredibly weak signals.

The resulting speed of 6 gigabits per second has pretty obvious application. The researchers points out that a single transmission beam could be used to supply as many as 250 internet connections running at 24 meagabits per second to sites where it’s impossible to run a wired connection. While you might immediately think such a system would be best suited to, say, disaster zones, the researchers reckon it could even prove a “cost-effective replacement for deployment of optical fiber.” Watch this space.

[Fraunhofer Institute for Applied Solid State Physics]

Contributing Editor at Gizmodo. An ex-engineer writing about science and technology.

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DISCUSSION

Sullivanish
Sullivanish

Headline says GB, which is gigabyte. Story says gigabit, which is Gb, and much smaller. I assume that since the story mentions a DVD (remember those?) in ten seconds, and those don’t hold anywhere near 60GB, that Gb is correct.

For the curious, 6Gb is about 750MB. A dual-layer DVD holds 9.Something GB, so at that speed, yeah, you could pull the contents of a fully packed DVD in slightly over 12 seconds. For those times when you have bleeding edge Wi-Fi, but only a standard definition tv, and no ability to compress for streaming.