NTT has been advancing the research and development of innovative wireless communication technologies capable of ultra-high-capacity data transfer comparable to optical fiber. The company successfully achieved a wireless transmission speed of 2 terabits per second—the fastest in the world for the millimeter-wave and sub-terahertz bands—in an outdoor environment over a distance of 100 meters.
This achievement stems from the company’s establishment of the “OAM-MIMO multiplex transmission method”—which utilizes the Orbital Angular Momentum (OAM) of radio waves to realize ultimate wireless spatial multiplexing—along with the suite of technologies required to extend its transmission range.
A key feature of this method is that it performs the majority of spatial multiplexing via analog signal processing, thereby reducing the computational latency and power consumption associated with digital signal processing to a fraction—specifically, one-hundredth—of conventional levels.
This capability enables applications involving high-capacity wireless communication between nodes that leverage wireless mobility—such as in “distributed computing” within AI data centers (where both low latency and power efficiency are required) and in “Radio Access Network (RAN)” systems for mobile communications (which necessitate the deployment of numerous devices).

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