This course is the first major portal to study in the field of communication engineering. The course consists of five sections. The first is on the analysis of signals, the theorems and relationships that will be used in the second, third and fourth sections. Then the second section presents the specifications of the linear, time fixed and less distortion system. The third section deals with the systems of amplitude modulation, while the fourth section reviews the systems of angular modulation. At the end, the fifth section for the random variables and processes in addition to the noise in analogue communications.