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July 26, 2020 07:34 am

Neural Network-Enhanced 'Cognitive Radio' Communicates With ISS

IEEE Spectrum reports:There's still plenty that can disrupt radio communications... Rather than waiting for a human on Earth to tell the radio how to adapt its systems — during which the commands may have already become outdated — a radio with a neural network can do it on the fly. Such a device is called a cognitive radio. Its neural network autonomously senses the changes in its environment, adjusts its settings accordingly — and then, most important of all, learns from the experience... Worcester Polytechnic Institute and Penn State University, in cooperation with NASA, recently tested the first cognitive radios designed to operate in space and keep missions in contact with Earth. In our tests, even the most basic cognitive radios maintained a clear signal between the International Space Station (ISS) and the ground. We believe that with further research, more advanced, more capable cognitive radios can play an integral part in successful deep-space missions in the future, where there will be no margin for error... Our own effort to create a proof-of-concept cognitive radio for space communications was possible only because of the state-of-the-art Space Communications and Navigation (SCaN) test bed on the ISS. NASA's Glenn Research Center created the SCaN test bed specifically to study the use of software-defined radios in space. The test bed was launched by the Japan Aerospace Exploration Agency and installed on the main lattice frame of the space station in July 2012... Ours would be the first-ever cognitive radio experiments conducted in space... During the tests, the cognitive radio clearly showed that it could learn how to maintain a communications link. The radio autonomously selected settings to avoid losing contact, and the link remained stable even as the radio adjusted itself... Overall, the success of our tests on the SCaN test bed demonstrated that cognitive radios could be used for deep-space missions.

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