Technology

World Record in Terrestrial Radio Transmission

A network of researchers has set a world record in the terrestrial radio transmission. The scientists have succeeded to transfer the contents of a complete DVD in only ten seconds. With a data rate of six gigabits per second (6GBs) over a distance of 37 km, the team has surpassed the State of the Art technology by a factor of 10.

Researchers at the Stuttgart University and Karlsruhe Institute of Technology (KIT) have now surpassed the State of the art in terrestrial radio transmission smooth by a factor of ten. Specifically have they the a commercially available DVD such as the 135-minute space tale “Star Wars” in only ten seconds over a distance of just under 37 km to transmit content. The data of the DVD were transferred from the roof of the 45 University Center in Cologne to the grounds of the space observation radar of TIRA at the Fraunhofer Institute for High-Frequency Physics and Radar Techniques (FHR).

Six Gigabit per second data rate

The radio relay world record in ACCESS (Advanced S-band satellite link Studies) research project with a data rate of 6 GB/s through the use of powerful transmitters and receivers at a radio frequency of 71 to 76 gigahertz (GHz) in the “S-band” shared for terrestrial and satellite radio. In this frequency range will be transmitted with millimeter wave. And only in this frequency range the high commercial bandwidth available, achieving such enormous data rates.

A boon for rural areas

With such data rates, it is for example possible to offer yet fast Internet so far with fiber-optic cable under-served rural and other remote areas. 250 Internet connections with 24 Mbit / s DSL can be supplied with the technology used at the world record. Particularly well suited this technology as an ad-hoc network in the crisis or disaster.

Problem is the attenuation of the signals

The central problem with terrestrial radio transmission is the attenuation of the signals over long distances. Therefore, which must produce strong signals transmitter according to, the amplifier on the receiving side must be just as powerful.

Terrestrial Radio Transmission
Targeting for 6GB/s World Record in Terrestrial Radio Transmission. Photo: Fraunhofer Institute for High-Frequency Physics and Radar Techniques / KIT