Cellular mobile networks for public and private users were company-specific solutions in Europe until the late 1980s and were not intended for the mass market. As a result, the interest of the broader technical and scientific community was limited to awareness of the systems and their concepts, without delving into the details. Since the development of European standards for digitally transmitted systems in the late 1980s, the introduction of these standards in 1990 has transformed mobile communications into a mass market. Digital mobile communications have evolved from a supplementary business to one of the key revenue drivers for some major telecommunications companies, which have risen to global market leadership. Accordingly, the interest of the technical and scientific community has increased. This success is based on significant advancements in information technology.