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WiMAX is one kind of emerging wide band wireless access technical standard. It is an technology of wireless metropolitan area network (WMAN), proposed chi hair straightener one kind of space connector standard aims at the microwave and the millimeter wave frequency band, was considered important means that is solves the wide band cheap polo shirts metropolitan area network construction "the last kilometer".The thesis has studied the WiMAX MAC level system structure, and based on the IEEE802.16 code requirement, has conducted the research to the gathering Lacoste Polo Shirts sublayer, has given the MAC level flow design, and has carried on the explanation to the Lacoste Polo Shirts QoS thought. The thesis has studied MAN-OFDM and the MAN-OFDMA technology emphasily in Cheap Lacoste Polo Shirts physical level four kind of structure, refers to the IEEE802.16 tetherless access standard, the algorithm which to the WiMAX system in the synchronization, the range finder, the channel estimated has conducted the research separately, has improved algorithm on the original algorithmic analysis comparison foundation, and has confirmed the improvement algorithm performance after the simulation.
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