| 摘要 |
An apparatus and method for allocating frequency resources in an OFDMA mobile communication system. A hop group includes a plurality of hop units, each hop unit being minimum frequency resources which can be allocated in a two dimensional time-frequency domain and a total frequency band of the OFDMA mobile communication system is divided into subbands. A base station allocates at least one hop unit to each mobile station, permutes the sequence of hop units included in each hop group according to a first permutation sequence, allocates the hop units of the each hop group to subbands, permutes the sequence of hop units included in each of the subbands according to a second permutation sequence, and determines the positions of the hop units permuted according to the second permutation sequence to be the positions of physical subcarriers allocated to the each mobile station.
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