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Unformatted text preview: NEAR DISTORTION: nonlinearity
creates new difference frequencies, causing energy
from one signal in a band to spill over to another
(intermodulation distortion). NOISE: Random disturbances, usually additive
Burst-type noises THERMAL NOISE
Proportional to absolute temperature and
proportional to bandwidth
SPECTRAL DENSITY CONCEPT: S(f)
measures how power of a random noise or signal
is distributed in frequency.
Thermal noise has a constant spectral
Maximum data rate of a channel - Shannon
formula - assume thermal noise.
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This note was uploaded on 01/26/2014 for the course EE 362 taught by Professor Laporta during the Fall '08 term at Pennsylvania State University, University Park.
- Fall '08