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CDMA 擴頻通信 跳頻碼分多址( FHCDMA) 直擴碼分多址( DSCDMA) In The Cocktail Party: What do you hear… “If you only speak Chinese?” “If you only speak English?” “If you only speak Italian?” “If you only speak French?” The pairs of people only want to talk and listen to themselves and have no interest in the others. If each pair only knows one language and uses it , and all the languages are different, they can all use the air in the room as a “carrier” for their voices and experience little interference f