| Summary: | Aiming at the complexity and system capacity of orthogonal frequency division multiplexing adaptive resource allocation, this paper proposes a joint subcarrier allocation and power allocation scheme. In the subcarrier allocation,the adjacent subcarriers in the frequency band are combined into subcarrier clusters. The user rate is proportionally restricted, and the subcarriers clusters is assigned to user according to a preset ratio. In the power allocation, the power is allocated to the user according to the ratio of the user rate after the subcarriers are allocated, and then the water injection algorithm is used to solve the problem of subcarrier allocation for single user. The simulation results show that the proposed scheme can not only effectively reduce the complexity of the algorithm, but also increase the system capacity, which proves the feasibility of the scheme.
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