Читать книгу Spatial Multidimensional Cooperative Transmission Theories And Key Technologies - Lin Bai - Страница 11

Since the concept of mobile communication was proposed by Bell Labs in the United States in 1947,¹ mobile communication technology has made rapid progress in the past 30 years and has become one of the indispensable communication means in modern ground-based communication networks. In this section, we will first expound the development of the four generations of ground-based mobile communications and the corresponding key technologies.²