SOFT-DECISION DEMAPPING METHOD FOR DIGITAL SIGNAL

PURPOSE: A soft-decision demapping method of a digital signal is provided to reduce comparison calculation operation, by selecting a spot positioned in constellation with only phase information of a symbol in advance. CONSTITUTION: Reference symbols are selected using most significant bit(MSB) of a...

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Bibliographische Detailangaben
Hauptverfasser:	SUNWOO, MYUNG HOON, KIM, PAN SOO, PARK, JANG WOONG, HAN, JAE HEE, CHANG, DAE IG
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:	PURPOSE: A soft-decision demapping method of a digital signal is provided to reduce comparison calculation operation, by selecting a spot positioned in constellation with only phase information of a symbol in advance. CONSTITUTION: Reference symbols are selected using most significant bit(MSB) of a received signal. The selected reference symbols are selected according to location probability of the received signal among total reference symbols on the constellation. The maximum value of the log likelihood ratio(LLR) is acquired for the selected reference symbols. The total reference symbols are phase-shifted.