协作CDMA系统上行链路功率控制策略及优化算法研究

针对协作CDMA系统上行链路功率控制优化算法复杂度过高的问题,提出了一种新的分段式低复杂度的功率控制策略及优化算法,其中系统的功率控制分两个阶段,前后两阶段分别采用分布式的功率控制优化算法和基于几何规划的功率控制优化算法。理论分析和数值仿真结果表明,功率控制优化算法对信道信息要求低、运算量小、复杂度低、收敛速度快,且收敛于全局最优。

Study of Power Control Strategy and Optimum Algorithm for Uplink Channel in a Cooperative Wireless CDMA Network

Considering the power control optimum algorithm presented in the previous work for the uplink channel in the cooperative wireless CDMA network was high complexity, a new two phase low complexity power control strategy and optimum algorithm is presented here. In the two phases, the distributed and geometric programming based power control optimum algorithms are applied respectively. The theoretic analysis and numerical simulation results show that the power control optimum algorithm presented in this paper has less channel information requirement, low computational complexity and fast convergence rate, and it can obtain the global optimal solution.