Improved Dynamic Subcarrier Allocation Scheduling for SC-FDMA Systems

摘要

Two dynamic subcarrier allocation algorithms: maximum proportional rate constraints algorithm and improved equal capacity increment algorithm are proposed for the Single Carrier Frequency Division Multiple Access (SC-FDMA) system. Aiming at achieving further improvement in the performance of system rate-sum capacity, the proposed maximum proportional rate constraints algorithm is designed by setting appropriate proportional rate constraints. Furthermore, the proposed improved equal capacity increment algorithm adopts the modified scheduling criterion during allocation on the basis of fairness. Simulation results indicate that the two proposed algorithms can both contribute an efficient trade-off between system rate-sum capacity and fairness compared to their primary algorithms. Moreover, the improved algorithm can achieve the similar overall performance with the maximum proportional rate constraints algorithm by costing significantly lower computational complexity.