الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
In digita{ communications, Information theory and coding tfieory witfi ayyCications in cornyuter science ana te{ecommunication, error detection ana correction or error contro{ are tecfiniques tfiat enaECe re{iaE{e deCivery of aigita{ aata over unreCiaE{e communication channeCs . .:Many communication cfianneCs are suEject to channe{ noise, ana tfius errors may Ee introaucea auring transmission from tfie source to a receiver. ’Error detection tecfiniques arrow cCetecting sucfi errors, wfii{e error correction enaE{es reconstruction of tfie origina{ aata. Tfie cfianne{ cocCe is usea to yrotect aata sent over it for storage or retrieva{ even in tfie yresence of noise (errors).
(1ooa error contro{ yerformance requires the scheme to Ee se{ectea Easea on tfie cfiaracteristics of the communication cfianneC Common cfianne{ modeCs inc{ude memory-Cess moaeCs wfiere errors occur ranaom{y ana witfi a certain yroEaEiCity, ana aynamic moaeCs wfiere errors occur yrimaruy in Eursts.
Cfianne{ coding is aone in two steys: The cfianne{ encocCer generates reaunaant symEoCs tfiat are transmittea or storea togetfier witfi tfie otfier aata. Tfiis reaunaancy is usea Ey tfie cfianne{ aecoaer to correct errors in tfie receivea aata or in tfie aata reaa from tfie storage medium. Coae aesign (how to aaa tfie reaunaant symEoCs) ana decoding tecfiniques (fiow to use tfiese reaunaant symEoCs for error correction) are tfie two main areas in cfianne{ coding