Line code: Difference between revisions

Revision as of 18:57, 22 May 2004

Revision as of 05:16, 27 June 2004

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A line coded signal must not contain a DC-component (the average signal level should be 0), because transport of a DC-component is impossible in case of long wires. An included DC-component would therefore lead to an offest at the recieving end, and thus to a higher decoding error probability.

Line coding should make it possible for the receiver to synchronise itself to the [[phase]] of the received signal. If the synchronisation is not ideal, then the signal to be decoded will not have optimal differences (in amplitude) between the various digits or symbols used in the line code. This will increase the error probability in the recievedreceived data.

It is also preferred for the line code to have a structure that will enable error detection.