Future wireless networks of the 6th generation (6G) will consist of a multitude of small radio cells that need to be connected by broadband communication links. In this context, wireless transmission at THz frequencies represents a particularly attractive and flexible solution. Researchers at Karlsruhe Institute of Technology (KIT) have now developed a novel concept for low-cost terahertz receivers that consist of a single diode in combination with a dedicated signal processing technique. In a proof-of-concept experiment, the team demonstrated transmission at a data rate of 115 Gbit/s and a carrier frequency of 0.3 THz over a distance of 110 meters. The results are reported in Nature Photonics.
5G will be followed by 6G: The 6th generation of mobile communications promises even higher data rates, shorter latency, and strongly increased densities of terminal devices, while exploiting Artificial Intelligence (AI) to control devices or autonomous vehicles in the Internet-of-Things era. “To simultaneously serve as many users as possible and to transmit data at utmost speed, future wireless networks will consist of a large number of small radio cells,” explains Professor Christian Koos, who works on 6G technologies at KIT together with his colleague Professor Sebastian Randel. In these radio cells, distances are short such that high data rates can be transmitted with minimum energy consumption and low electromagnetic immission. The associated base stations will be compact and can easily be mounted to building facades or street lights.
To form a powerful and flexible network, these base stations need to be connected by high-speed wireless links that offer data rates of tens or even hundreds of gigabits per second (Gbit/s). This may be accomplished by terahertz carrier waves, which occupy the frequency range between microwaves and infrared light waves. However, terahertz receivers are still rather complex and expensive and often represent the bandwidht bottleneck of the entire link. In cooperation with Virginia Diodes (VDI) in Charlottesville, USA, researchers of KIT’s Institute of Photonics and Quantum Electronics (IPQ), Institute of Microstructure Technology (IMT), and Institute for Beam Physics and Technology (IBPT) have now demonstrated a particularly simple inexpensive receiver for terahertz signals.
Highest Data Rate Demonstrated So Far for Wireless THz Communications over More Than 100 Meters
“At its core, the receiver consists a single diode, which rectifies the terahertz signal,” says Dr. Tobias Harter, who carried out the demonstration together with his colleague Christoph Füllner in the framework of his doctoral thesis. The diode is a so-called Schottky barrier diode, that offers large bandwidth and that is used as an envelope detector to recover the amplitude of the terahertz signal. Correct decoding of the data, however, additionally requires the time-dependent phase of the terahertz wave that is usually lost during rectification. To overcome this problem, researchers use digital signal processing techniques in combination with a special class of data signals, for which the phase can be reconstructed from the amplitude via the so-called Kramers-Kronig relations. The Kramers-Kronig relation describe a mathematical relationship between the real part and the imaginary part of an analytic signal. Using their receiver concept, the scientists achieved a transmission rate of 115 Gbit/s at a carrier frequency of 0.3 THz over a distance of 110 m. “This is the highest data rate so far demonstrated for wireless terahertz transmission over more than 100 m,” Füllner says. The terahertz receiver developed by KIT stands out due to its technical simplicity and lends itself to cost-efficient mass production.
Materials provided by Karlsruher Institut für Technologie (KIT). Note: Content may be edited for style and length.
Karlsruher Institut für Technologie (KIT). “Terahertz receiver for 6G wireless communications.” ScienceDaily. ScienceDaily, 8 September 2020. <www.sciencedaily.com/releases/2020/09/200908122517.htm>.
Microtechs 24x7x365 White label support services
Based in Surrey, Microtechs are an established and experienced end user support centre. Our Help desk and NOC experts can monitor your servers and support queue (email, RMM & phone) 24×7 or just as overflow. The Microtechs White Label support service offers a cost effective, 24×7 support option perfect for providers with an expanding customer base.
You may ask yourself:
- How can I offer support 24/7 without the stress & cost of recruiting and training?
- How can I free up my team’s time, to enable us to grow the business?
- How can I improve my bottom line?
Microtechs can help.
- Office hours or 24/7
- UK based from Guildford, Surrey
- 1st & 2nd line / NOC and incident management capabilities
- Ability to learn bespoke applications
- All white labelled to your brand
- 25-50% reduction in overheads
- Pricing from £550 per month
- Sole traders through to enterprise companies supported
Here’s what our customers have said;
“Using Microtechs to extend the helpdesk capabilities for our organisation has been a very worthwhile venture for us. The transition was very easy and simple, and we have found the Microtechs staff to be both knowledgeable and professional; in their dealings with our clients.”
“My customers receive a polite service and their issues are dealt with quickly and professionally. In short Microtechs provide a courteous, effective and cost-efficient service that enables me to offer my customers 24/7 support without the associated expense.”
It would be great to have a chat with you and understand a little about your business, even if you are not quite ready to outsource.
Live chat us now or call 01483 407417