Friday, June 21, 2024

High-Speed Data Transfer Technique To Send 8K Video Over 300GHz Link

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Researchers realized a high-speed data transfer technique to send an uncompressed 8K video over 300 GHz link.

High-speed data transfer is generally done using various modulation and digital signal processing techniques. Researchers from Osaka University have teamed up with Rohm to send 8K video at 48Gbit/s over a 300GHz carrier using a simple modulation technique.

“In general, such ultra-high-speed data transmission experiments are performed using multi-level modulations via a complex system with high power consumption that uses off-line or on-line digital signal processing,” said team leader Masayuki Fujita. “The present real-time demonstration, which uses the simplest OOK [on-off keying] format, shows the capability of ultra-broad band terahertz waves. Our achievement demonstrates the usefulness of terahertz waves and is expected to accelerate research and development activities for the realization of ‘beyond 5G’, and eventually 6G.”

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The researchers created a two-channel terahertz transmitter, using pairs of lasers with wavelengths in the 1.55μm band, but differences in the 300GHz band. The 8K video source was intensity-modulated onto the signal with an ultra-fast photodiode.

The video was uncompressed 8K, sent as a four-channel 12Gbit/s signal combined to form two separate RF channels modulated at 24Gbit/s. Receiver consists of a self-oscillating tunnel diode, which is tuned for high-sensitivity coherent detection of incoming THz waves. The detected and decoded 24Gbit/s streams are then split into  four channels for an HDMI connection to an 8K monitor.

 “Among all electronic-based systems, ours achieved the highest error-free wireless transmission data rate,” said researcher Yousuke Nishida at the time.



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