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gateway antennas where they operate as dichroic mirrors. In this case, they are used to direct the waves associated to different frequencies from or to feeds located at virtual focal points of the reflector
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PhD offer in Channel charting and machine learning techniques for massive cell-free MIMO 6G networks
imposed by technical, environmental and societal concerns. To this end, researchers advocate three main factors enabling more efficient and greener communications: (i) massive distributed antenna systems
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components whose response can be changed after their fabrication. For instance, filters with a reconfigurable frequency response, or antennas with a reconfigurable radiation pattern. This could impact a large
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, vol. 38, no. 11, pp. 2450-2525, Nov. 2020. [4] N. Shlezinger, et al., "Dynamic Metasurface Antennas for Uplink Massive MIMO Systems," IEEE Transactions on Communications, vol. 67, no. 10, pp. 6829-6843