Abstract: In massive multiple-input multiple-output (MIMO) system, channel state information (CSI) is essential for the base station (BS) to achieve high performance gain. The CSI matrix needs to be ...
A pair of stars orbiting one another has been found near the supermassive black hole Sagittarius A* using the European ...
For the study, the researchers made several remarkable and new discoveries: the two M-type stars that comprise the binary ...
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