Claiming a world first, Japan’s Nippon Telegraph and Telephone Corporation (NTT Corp) has announced the successful demonstration of 100Gbps wireless transmission using a new principle – Orbital Angular Momentum (OAM) multiplexing – as it strives to realise ‘terabit-class wireless transmission to support demand for wireless communications in the 2030s’. In a press release, the Japanese carrier said the laboratory trials demonstrated that ‘dramatic leaps in transmission capacity’ are achievable via its proprietary system that ‘mounts data signals on electromagnetic waves generated by this new principle of OAM multiplexing in combination with widely used MIMO technology. The firm’s statement reads: ‘NTT conducted transmission experiments at a distance of ten metres in the laboratory using the devised system operating in the 28GHz frequency band. Eleven data signals each at a bit rate of 7.2Gbps to 10.8Gbps were simultaneously generated and carried by multiple OAM-multiplexed electromagnetic waves, thereby achieving large-capacity wireless transmission at a world-first total bit rate of 100Gbps.’ Further, NTT says the trials highlight the possibility that OAM multiplexing could be applied ‘to large-capacity wireless transmission at a level about 100 times that of LTE and Wi-Fi, and about five times that of 5G scheduled for launch’.
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