Essay On Noise On Communication Systems

Noise in Communication Systems
Dialogo, Jonathan R.
Department of Electronics and Computer Engineering
University of the Cordilleras
Baguio City [e-mail] Abstract
Have we ever asked ourselves if there is a perfect communication system? A communication wherein there is a zero noise and a system that will give us a maximum satisfaction. As if as it sounds good but in actual, there is a bit change and deterioration of signals. Using an oscilloscope (an instrument used to display variations in a fluctuating electrical quantity signals), we can observe the behavior of noise signal comparing it with the message signal. If we increase the signal of the message, we are also increasing the signal of the noise.
The aim of this research is to study how noise greatly affects our communication system since it was discovered. To study the different classifications, sources, effects of noise, etc. This explains why noise is always present in all systems and can never be avoided. Any system must contend with noise.

Introduction
Noise is a random, undesirable or unwanted electrical energy that enters the communications system via the communicating medium or channel and interferes with the transmitted message. However, some of the noise is also produced in the receiver.
In analog communication systems, noise degrades the quality of the received

External noise maybe classified as: atmospheric noises, extraterrestrial noises, and a man-made or industrial noises. Atmospheric Noise (Static Noise) is caused by discharges in thunderstorms and other natural electrical disturbances occurring in the atmosphere. These electrical impulses are random in nature. Hence the energy is spread over the complete frequency spectrum used for radio communication. Extraterrestrial Noise There are numerous types of extraterrestrial noise or space noises depending on their sources. However, these may be put into following two