一种改进的MIMO-MC-CDMA系统资源分配算法

An Improved Resource Allocation Algorithm for MIMO-MC-CDMA Systems

在发送端总发射功率受限的条件下,文中提出了一种通过多用户间功率、子带和码道的分配以实现MIMO-MC-CDMA系统资源分配算法.通过限制用户占用的最小、最大码道数来实现用户之间的带宽公平性.算法将用户公平性限制下的吞吐量最大化问题归结为一个约束优化问题,并利用拉格朗日乘子法进行求解.仿真实验结果表明,文中算法较现有算法显著增大了吞吐量,并提高了收敛速度.

Under the constraint of total transmission power at the sender, this paper proposes a resource allocation algorithm for MIMO-MC-CDMA systems. In this algorithm, the system throughput is optimized by assigning the power, the sub-bands and the code channels among users, and the bandwidth fairness is implemented by limiting the maximum and minimum occupied code channels of all users. The throughput maximization problem is modelled as a constrained optimizaiton problem, which is solved by the Lagrange multiplier method. Simulated results show that, as compared with the existing algorithms, the proposed algorithm significantly increases the throughput and accelerates the convergence.