摘要
提出一种应用于多输入多输出MC-CDMA系统的功率、码道自适应分配算法。基于接收端的信道反馈信息,发送端在总发射功率受限的条件下通过多用户间功率和码道的分配最大化系统吞吐量。算法通过限制用户的最大和最小码道数来实现用户之间的带宽公平性。算法最终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。提出一种用于加快拉格朗日乘子收敛速度的搜索算法,计算机仿真验证了算法的有效性。
This paper presents a spreading codes and power allocation algorithm for Multiple-Input- Multiple-Output MC-CDMA system with channel constraint is used to limit the maximum and m multiplier method is applied to solve the optimization improve the state information available at the transmitter. Fairness inimum number of spreading codes for all users. A Lagrange constrained optimization problem. The solution of this problem requires multi-dimensional searching. A modified searching method is also proposed to convergence speed.
出处
《通信技术》
2009年第12期212-214,219,共4页
Communications Technology
基金
国家自然科学基金(No.60672065)
广东省自然科学基金(No.8151064101000066
No.07006488)
