直ちょっ交こう周しゅう波は数すう多た重じゅうMeaningsNoun1. OFDM; orthogonal frequency division multiplexingKanji used直straight交mingle周circumference波a wave数number多many重heavyComposed of直ちょくdirect; night duty; night watch; being on duty (in a factory); shiftNo-adjective交こうassociation; fellowship; change (of season, year, etc.)Noun周しゅう波は数すうfrequency (esp. of waveforms)Noun多た重じゅうmultiple; multiplexNoun