O I n f o r m a c i j i 2.0 : informacija u teoriji

Model of a general communication system (Shannon)

Knowledge unit (infom) : Schematic diagram of a general communication system
Author(s) : Claude E. Shannon
Bibliographic unit : The mathemtical theory of communication
Year: 1949
Knowledge category : DEFINITIONS & CONCEPTS & PRINCIPLES & METHODS & MODELS OF INFORMATION

By a communication system we will mean a system of the type indicated schematically in Fig. 1. It consists of essentially five parts:

1. An information source which produces a message or sequence of messages… The message may be of various types: (a) A sequence of letters as in a telegraph or teletype system; … the light intensity at point (x, y)…
2. A transmitter which operates on the message in some way to produce a signal suitable for transmiss1ion over the channel… [For example] In telegraphy we have an encoding operation which produces a sequence of dots, dashes and spaces…
3. The channel is merely the medium used to transmit the signal from transmitter to receiver. It may be a pair of wires, a coaxial cable, a band of radio frequencies, a beam of light, etc. During transmission, or at one of the terminals, the signal may be perturbed by noise.
4. The receiver ordinarily performs the inverse operation of that done by the transmitter, reconstructing the message from the signal.
5. The destination is the person (or thing) for whom the message is intended.

Fig. 1. – Schematic diagram of a general communication system.

No. Citation Author (Year) Updated
1.

 

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