Page 17 - NOISE IN SYSTEM COMMUNICATION
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EXTERNAL NOISE
External Noise is the noise which is generated outside the device
or circuit system. External noises are somewhat uncontrollable
2 Extra-Terrestrial/ Space Noise
Space noise is divided into two categories;
i) Solar noise
ii) Cosmic noise
Cosmic Noise
Cosmic noise is an electrical noise
generated from the galaxies such as
stars.
The star and distant also like a sun
which have high temperature.
Therefore, these stars radiate the
noise in the same way as sun.
The noise receive from the distant,
star is known as thermal noise and
distributed almost uniformly over the
entire and almost effects on
communication of radio waves.
Source: canva.com
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