Originates in the communication medium
• Man-made noise
Generated by equipment such as motors
• Atmospheric noise (also called static)
Dominates at lower frequencies and typical solution
involves "noise blanking"
• Space noise (Mostly solar noise)
Dominates at higher frequencies and can be a serious
problem in satellite communications
Originates in the communication equipment
• Thermal noise (also called white noise)
produced by random motion of electrons in a conductor
due to heat
Noise Power in watts is directly proportional to
Bandwidth in Hz, and the temperature in degrees Kelvin