Telecommunications engineering
Introduction
telecommunication engineering (also, telecommunication engineering, telecommunication engineering, telecommunications engineering) is the branch of engineering that concerns the design, construction, operation and administration of systems and networks for transmitting signals such as voice, images and videos.[1] It is the discipline of application of telecommunications, a term that refers to communication at a distance, generally through the propagation of electromagnetic and optical waves. This includes many technologies, such as radio, television, telephone, data communications, and computer networks such as the Internet. The definition given by the International Telecommunication Union (ITU) for telecommunication is any emission, transmission and reception of signs, signals, writings and images, sounds and information of any nature, by wire, radioelectricity, optical means or other electromagnetic systems. [2].
Structure of a telecommunications system
A telecommunications system is composed of the sender of information, the transmission channel and the receiver "Receiver (communication)") of the information. The sender is a device that transforms or encodes the message into a physical phenomenon: the signal. The channel or medium transmits said signal, and the receiver does the reverse process to the sender to obtain the information.
The functions of the sender always involve in one way or another the coding of the information and its adaptation to the channel. The transmission channel, for physical reasons, modifies or degrades the signal in some way along its path. The receiver must perform the functions of detecting the signal, recomposing it and decoding it in order to extract the information. In this process there is always a possibility of error, which telecommunications engineering tries to minimize.
As a familiar example of a telecommunications system we can consider vocal communication between people. We can break this case down like this:
In other cases, as an example, communication can be carried out between faxes, telephones, keyboard-printer, camera-screen... and the communication channel can be composed of wires, radio waves, fiber optics, satellite...
Depending on the direction of transmission, communication can be classified as unidirectional (from sender to receiver) or bidirectional (communication in both directions).