多用户OFDM系统中改进的动态子载波与功率分配算法

An Improved Algorithm for Dynamic Subcarrier and Power Allocation in Multiuser OFDM Systems

提出了一种对于多用户OFDM(OrthogonalFrequencyDivisionMultiple)系统改进的动态子载波和功率分配算法。算法采用分步的思想对系统资源进行动态分配,在已知系统总功率和用户最小速率请求的条件下,使系统总的比特速率最大,资源得到了有效利用。此算法简单易于理解,复杂度较低,仿真结果表明,其性能接近于联合的分配算法。

This paper proposes an improved algorithm for dynamic subcarrier and power allocation in multiuser OFDM systems. This algorithm allocates recourses dynamically. Given the system＇s total-power and each user＇s requirement on the minimum rate, this algorithm tends to find the maximum bitrate to make effective use of the resources. The simulation result shows that the algorithm has less computation and better performance than the joint allocation algorithms.