From the second number onward, each number in the sequence is the product of the digits of its predecessor. The next two numbers are therefore 3 × 3 × 6 = 54 and 5 × 4 = 20. All subsequent numbers in ...

Abstract: Time-coding metasurfaces (TCM) have emerged as a promising approach for radar target feature modulation (RTFM), attracting significant attention in recent years. However, existing methods ...

Abstract: This article is a tutorial introduction to the field of unsourced multiple access (UMAC) protocols. We first provide a historical survey of the evolution of random access protocols, focusing ...