Cognitive manipulation of Wireless Channel Matrix using Software-driven Electromagnetic Skins for mmWave and sub-THz

Electromagnetic skins (EMSs) can be employed to manipulate the wireless channel matrix, improving the signal-to-noise ratio at the millimeter-wave and sub-THz frequency spectrum. A line-of-sight channel can be achieved through the use of reconfigurable intelligent surfaces, passive reflectarrays, and frequency-selective surfaces for scattering mitigation. These beamforming surfaces are integrated with cognitive radios, which exploit field diagnosis and deep learning for acquiring channel state information. These software-driven EMSs are expected to be a cost-effective solution for future smart electromagnetic environments.