Dispersion – Definition and Pronunciation
What is Dispersion?
Dispersion is any phenomenon in which the velocity of propagation of an electromagnetic wave is wavelength-dependent. Processes by which an electromagnetic signal propagating in a physical medium is degraded because the various wave components (i.e., frequencies) of the signal have different propagation velocities within the physical medium.
Examples of Dispersion
Among these is the need to compensate for gateway and satellite component performance changes over temperature and life, satellite and ground station pointing errors, and signal propagation amplitude and phase dispersion effects, including Doppler shifts.
From “Aeronautical Mobility Services”.
In addition to free space losses (attenuation), there are a multitude of other factors that have to be taken into account. These include, but are not limited to, attenuation, distortion, dispersion, intermodulation, fade, multipath, dropouts, and external and adjacent satellite interference, and cross-pol(arization) interference.
From “High Throughput Satellites (HTS) and KA/KU Spot Beam Technologies”.
ISI is the interference between adjacent symbols often caused by system filtering, dispersion in optical fibers, or multipath propagation in radio system.
From “DVB-S2 Modulation Extensions and Other Advances”.
Pronunciation of Dispersion
