Efficient Rate Adaptive Resource Allocation Scheme in Uplink OFDMA Wireless Systems
The problem of resource allocation for the uplink of wireless SISO-OFDMA systems is investigated. To relieve heavy computational burden, a suboptimal, but efficient scheme is devised which maximizes the sum of the users' data rates subject to constraints on the per user transmitted power and minimum data rate requirements among users. Simulation results indicate that the proposed scheme can satisfy minimum data rate constraints, distributing sum data rate fairly and flexibly among users. In addition, the proposed scheme is complexity effective, and can be applied to latest-generation wireless systems that provide Quality-of-Service (QoS) guarantees.