Created a frequency switch for 6G networks that do not interfere with satellites

Scientists from Northeastern University's Wireless Internet of Things Institute and Laboratory

Caltech's jet propulsion system designeda system for sharing extremely high frequencies between 6G communications networks and scientific satellites. The development combines a hardware device for switching frequencies and a program that tracks the location of passive sensing services.

Sixth generation (6G) wireless networks willcombine mobile traffic with a higher-than-ever ultra-high-capacity transport channel, which the authors believe can be deployed in the largely untapped frequency range above 100 GHz. 

However, a number of frequencies in this range are reserved.for the operation of passive sensing services. These are satellites that use only highly sensitive RF sensors for Earth exploration, weather monitoring and radio astronomy. Interference from communication networks will adversely affect such observations.

The system proposed by scientists tracks the orbits of satellites and automatically switches frequency bands, thereby preventing interference caused by data transmission to passive operators. 

Hardware of the created deviceis a hardware accelerated protocol stack that generates an orthogonal frequency division multiplexing waveform. The device can operate in two bands: 123.5–140 GHz and 210–225 GHz. 

Pilot plant. Source: Michele Polese et al, Communications Engineering

To demonstrate the operation of the device, scientists have collecteda prototype that provides wide-format data transmission on the campus of Northeastern University. The scientists used motion data from NASA's Aura satellite to provide frequency switching as the satellite passed over the data network. The results of the experiment showed that the system functioned successfully without interfering with scientific research.

The developers note that the system they createdis the first wireless system above 100 GHz that uses a real-time protocol stack in two frequency bands, performs automated and dynamic spectrum sharing, and adapts link parameters in real time.

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