Researchers have made progress in developing “6G” wireless technologies by using 300 GHz terahertz waves to transmit uncompressed 8K ultra-high definition (UHD) video at a data rate of 48 Gbit / s over the air.
The next generation 6G mobile communications standard – which goes beyond the current 5G system – is expected to transmit 8K and other UHD videos with low latency and low power consumption.
Since the data rate of UHD video is very high, it is necessary to compress the data when it is transmitted wirelessly with microwaves or millimeter waves, resulting in delays and increased power consumption. Therefore, the development of a technology for uncompressed wireless transmission of UHD video is required.
“In general, the higher the frequency, the greater the capacity to transmit information, with terahertz waves having a higher frequency than microwaves and millimeter waves. We focused on terahertz waves in the 300 GHz band, ”said Julian Webber, an assistant professor at Osaka University.
The researchers configured a two-channel terahertz transmitter (Tx) by modulating the output of a laser pair. They then sent an 8K video signal source using an intensity modulator and converted it into terahertz waves using an ultra-fast photodiode.
“In general, such experiments with ultra-fast data transmission are conducted using multilevel modulations through a complex, high-power consumption system that uses offline or online digital signal processing,” said study leader Masayuki Fujita.
“Our achievement demonstrates the utility of terahertz waves and is expected to accelerate research and development efforts to deliver Beyond 5G and ultimately 6G.
“Such uncompressed wireless transmission technology for UHD video will improve the quality of telemedicine and telecommuting, which are directly related to social issues, and will lead to the advancement of physical-cyber fusion by leveraging the big data of UHD video.”
In 2019, former US President Donald Trump called on US companies to step up development of 6G to maintain the country’s technological lead.
In 2017, an expert told E&T that 6G networks may never take place and that future iterations will instead rely on evolved 5G standards.