OFDMA系统中的多用户自适应资源分配算法

Multi-User Adaptive Resource Scheduling in OFDMA

正交频分复用接入具有传输速率高,带宽分配灵活等特点。在对与多天线STBC等效的单发单收模型进行研究的基础上,结合OFDMA的动态资源分配策略,提出了一种多用户多速率自适应子载波资源分配算法。仿真实验表明,自适应系统由于采用了多用户多速率自适应子载波资源分配策略,不仅可以灵活地支持多速率业务,而且能降低系统的发射总功率,进一步改善了系统性能。

Orthogonal frequency division multiple access （OFDMA） is widely used for its characteristics of high data transmission rate and the flexibility of bandwidth allocation. An equivalent SISO model for MIMO STBC system is introduced, and multi-user multirate adaptive sub-carrier allocation scheme is proposed. By analyzing and simulations, the results show that performance will be improved when the adaptive sub-carrier allocation algorithm are used in conventional system by reducing the total transmit power.