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A mobile service between base stations and land mobile stations, or between land mobile stations.
Type of polarisation, at which electric vector vibrations are held onto plane perpendicular to the direction of propagation only.
An unobstructed line of electromagnetic wave propagation (to the radio horizon or to an obstacle).
The accounting of all of the gains and losses from the transmitter, through the medium (radio space, cable, waveguide, optical fibre, etc.) to the receiver in a telecommunication system.
Slow fading with the probability distribution of the signal envelope (or instantaneous power) , whose logarithm is normally distributed.