基于混合业务的OFDMA系统资源分配

针对存在混合业务的OFDMA系统的子载波和功率分配问题，提出了一种基于折衷因子的次优资源分配算法，在系统总发送功率的限制下使得系统的吞吐量最大，同时保证实时业务用户的QoS要求和非实时业务用户资源分配的比例公平.该算法将自适应资源分配与自适应调制相结合，并加入了比特调整和优化处理，对实时业务用户和非实时业务用户间的资源利用进行了有效的折衷.分析和仿真结果表明，SRATF算法在不增加复杂度的前提下减少了运行时间，保证了非实时业务用户间的公平性.

Resource allocation in OFDMA systems based on heterogeneous services

Aiming at the subcarrier and power allocations in orthogonal frequency division multiple access(OFDMA) system with heterogeneous services,a suboptimal resource allocation algorithm based on a tradeoff factor was proposed.Under the limitation of total transmitting power,the proposed algorithm could not only maximize the throughput of the system,but also ensure the QoS requirements from real time users and the proportional fairness of resource allocation among non real-time users.The adaptive resource allocation and adaptive modulation were combined in the proposed algorithm,and the bit adjustment and optimization processing were introduced in the algorithm.An efficient tradeoff for the resource usage between both real-time and non real-time users was performed.The analysis and simulation results show that without increasing the complexity,the SRATF algorithm can reduce the running time,and guarantee the fairness between non real-time users.