The OFDM technique for IEEE 802.16 standard and the advance AOFDM

The IEEE 802.16 telecommunications standard envisions broadband wireless “last mile” broadband access in a metropolitan area network (MAN). The Orthogonal Frequency Division Multiplexing (OFDM), an effect technique in multipath environment, was chosen as physical layer transmission technique (WirelessMAN-OFDM) for this standard. This paper shows OFDM technique, which is used in physical layer transmission technique of The IEEE 802.16 telecommunications standard, from theory, the base of math and telecommunication system used OFDM. The adaptive OFDM, the advance of OFDM can supply more effectively transmitsion, is presented. It shows me many applications of OFDM and AOFDM in the future.