Abstract: Extremely large-scale antenna array (ELAA) technologies consisting of ultra-massive multiple-input-multiple-output (UM-MIMO) or reconfigurable intelligent surfaces (RISs), are emerging to ...
Pigeons keep droning on and on in the sky, from one spot to another they map out expanses with just flapping. But in Russia, spotting a pigeon just doesn't mean looking at a bird, it means you might ...
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