Feeds

German researchers claim 100 Gbps wireless transmission record

Beat that, WiFi! And suck it up, fibre-to-the-premises fans

3 Big data security analytics techniques

German researchers are claiming a world record, using a 237.5 GHz carrier and photonic mixing to achieve a 100 Gbps wireless link.

Don't throw away that WiFi kit just yet, however: while the reach, at 20 metres, is good enough to cover most household applications, the setup is a little bit exotic at this point in the system's development.

If commercialised, however, the researchers hope their 100 Gbps-capable link could act as a fibre extender in FTTN-style deployments, telling Phys.org “this technology represents an inexpensive and flexible alternative to optical fiber networks, whose extension can often not be justified from an economic point of view”.

The signals were generated using a photonic mixer from NTT Electronics, with custom-made receiver silicon built by the Fraunhofer Institute of Applied Solid State Physics.

Using photonics to generate the carrier wave is important, since it's difficult to work with electrical signals at such high frequencies. The photonic mixer took two light signals generated by lasers, with the difference between them resulting in the modulated 237.5 GHz electrical signal.

That was then fed to a conventional antenna for transmission to the receiver.

As the researchers describe the experiment in their Nature Photonics abstract: “a narrow-band terahertz carrier is photonically generated by mixing comb lines of a mode-locked laser in a uni-travelling-carrier photodiode. The uni-travelling-carrier photodiode output is then radiated over a beam-focusing antenna. The signal is received by a millimetre-wave monolithic integrated circuit comprising novel terahertz mixers and amplifiers.”

Professor Jürg Leuthold explained that the linearity and wide bandwidth of the photonic mixer makes it suitable for “advanced modulation formats with multiple amplitude and phase states”, meaning that it also provides good spectral efficiency.

KIT's fast wireless demonstration

KIT's demonstration setup, showing the receiver connected

to an oscilloscope. Image: KIT

The receiver used HEMT (high electron mobility transistor) technology able to operate between 200 and 280 GHz. Funded by Germany's Federal Ministry of Education and Research, the Millilink project could reach 1 Tbps using multiple transmission paths, according to experiment designer Professor Thomas Zwick from the Karlsruhe Institute of Technology. ®

3 Big data security analytics techniques

More from The Register

next story
Virgin Media so, so SORRY for turning spam fire-hose on its punters
Hundreds of emails flood inboxes thanks to gaffe
A black box for your SUITCASE: Now your lost luggage can phone home – quite literally
Breakfast in London, lunch in NYC, and your clothes in Peru
AT&T threatens to pull out of FCC wireless auctions over purchase limits
Company wants ability to buy more spectrum space in auction
Turnbull leaves Australia's broadband blackspots in the dark
New Statement of Expectations to NBN Co offers get-out clauses for blackspot builds
Facebook claims 100 MEEELLION active users in India
Who needs China when you've got the next billion in your sights?
Facebook splats in-app chat, whacks brats into crack yakety-yak app
Jibber-jabbering addicts turfed out just as Zuck warned
Google looks to LTE and Wi-Fi to help it lube YouTube tubes
Bandwidth hogger needs tube embiggenment if it's to succeed
prev story

Whitepapers

Securing web applications made simple and scalable
In this whitepaper learn how automated security testing can provide a simple and scalable way to protect your web applications.
3 Big data security analytics techniques
Applying these Big Data security analytics techniques can help you make your business safer by detecting attacks early, before significant damage is done.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Top three mobile application threats
Learn about three of the top mobile application security threats facing businesses today and recommendations on how to mitigate the risk.
Combat fraud and increase customer satisfaction
Based on their experience using HP ArcSight Enterprise Security Manager for IT security operations, Finansbank moved to HP ArcSight ESM for fraud management.