Learn how to type or insert the sum (Σ) symbol in Excel to make your spreadsheets cleaner and easier to read. Perfect for ...

The @ symbol can also appear in regular formulas outside of tables when Excel thinks you're trying to reference a single value from a range. If you see it pop up unexpectedly, it usually means Excel ...

Abstract: In this paper, a 4-symbol on-off keying sequence pattern recognition scheme is proposed. Sequence pattern recognition serves as the core mechanism of the photonic firewall. The recognition ...

Abstract: LiFi for intra-satellite communication offers immense advantages like flexible AIT or reduced complexity (harness). However, high bandwidths and redundancies are equally required. Modulation ...