Abstract: In extremely large-scale multiple input multiple output (XL-MIMO) systems, near-field beam training (NFBT) is an essential way to acquire channel state information (CSI) knowledge. To reduce ...
Abstract: Three characteristics of radar antennas are their effective aperture, power gain, and directional gain. Although the equation of radar usually uses power gain, directional gain, or just ...
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27 remarkable photos from the Close-Up Photographer of the Year 2022
The Close-Up Photographer of the Year (CUPOTY) has announced the winners of its 2022 challenge: Minimal!
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