Scientists send data at the speed of 32 Gbps using twisted radio beams2014-09-17 09:34 by Daniela
Scientists at the University of Southern California (USC) have found a way to twist radio beams and transmit data at 32 gigabits per second.
The study was led by Alan Willner of the USC Viterbi School of Engineering. During the experiments in a basement lab at USC, Willner and his team were able to transmit data at transmission rates reaching 32 gigabits per second across 2.5 meters of free space. With these speeds, users can send 10 hours of movie in just a second.
To achieve the high transmission rates, the team further developed Willner's previous work and twisted radio beams together. They passed each beam - which carried its own independent stream of data - through a "spiral phase plate" that twisted each radio beam into a unique and orthogonal DNA-like helical shape. A receiver at the other end of the room then untwisted and recovered the different data streams.
"Not only is this a way to transmit multiple spatially collocated radio data streams through a single aperture, it is also one of the fastest data transmission via radio waves that has been demonstrated," Willner said in a news release." The advantage of radio is that it uses wider, more robust beams. Wider beams are better able to cope with obstacles between the transmitter and the receiver, and radio is not as affected by atmospheric turbulence as optics," he added.
"This technology could have very important applications in ultra-high-speed links for the wireless 'backhaul' that connects base stations of next-generation cellular systems," said Andy Molisch of USC Viterbi. Molisch, whose research focuses on wireless systems, co-designed and co-supervised the study with Willner. Future research will focus on attempting to extend the transmission's range and capabilities.
Read more -here-