Fujitsu Laboratories announced that, in preparation for the next-generation mobile communications 5G system, achieved multiple access by multiplexing millimeter-wave beams. This technology will enable simultaneous high-capacity communications for multiple users while minimising reductions in communications speeds.
In the past, when large numbers of users communicated at the same time, because their emitted radio waves would interfere with each other, there was a need to partition time and frequencies, which resulted in the problem of slower communications speeds. Now, in the 60 GHz millimeter-wave band, Fujitsu developed a technology that reduces radio waves that were generated outside of the targeted direction during beam formation using array antennas that consisted of multiple aligned antenna elements, to one fifth the conventional amount.
With the developed technology, by multiplexing narrow radio-wave beams, many users are able to communicate without interfering with each other, and reductions in speed during times of high-capacity communications are minimised. In internal experimentation, by forming four millimeter-wave beams, Fujitsu was able to achieve 12 Gbps communications speeds, the world's highest level.
Details on the technology will be released at the meeting of the Technical Committee on Short Range Wireless Communications of the Institute of Electronics, Information and Communication Engineers to be held on 15 June, at Fujitsu's Kawasaki facility.
