A Communications channel (or channel for short), models the medium through which information
is transmitted from a sender (or transmitter) to a receiver. For
example, in wireless communications, the channel is often modelled by a random
attennuation of the transmitted signal, followed by additive noise. The
attennuation captures the loss in signal power over the course of
the transmission, and the noise in the model captures external interference and/or
electronic noise in the receiver. Hence, depending on the application, the mathematical
model for the communication system includes a model for the distortion introduced
by the tranmission medium, and termed the communication channel, or channel for short.
Types of Communications channels
Topics for Expansion/Linking
See Also: Claude Shannon, Information theory, Shannon capacity, Shannon-Hartley law, Binary symmetric channel
de:Kommunikationskanal
