DFP算法在CDMA移动通信上行链路功率控制中的应用研究

本文提出了一种基于DFP算法的功率控制方案。详细研究了该方案在CDMA移动通信中,进行融合基站分配的上行链路功率控制的应用理论。首先导出了最小发送功率控制模型。而后,提出了用DFP算法求解该模型的原理框图,并分析了用该方案进行最小发送功率控制的基本理论和实际性能,探讨了该方案中进行一维搜索的方法。最后用计算机仿真法模拟出该方案的运行性能。结果表明与最小功率控制算法相比,DFP功率控制算法可以提高基站接收信号的平均信扰比,降低信扰比的平均偏差,减小信扰比低于目标信扰比一定比例的用户数量,从而可以降低用户信号的中断概率、提高信道容量。

The Application investigation of DFP algorithm for uplink Power Control in CDMA mobile Communications

In this paper, a kind of power control scheme based on Davidon Fletcher Powell (DFP) algorithm is proposed, and study is conducted on the application of this algorithm to the integrated uplink power control and base station assignment. At first, the minimum transmitted power control model is derived. The principle diagram of the kind of DFP algorithm to solve the model is then put forward, and the analysis is given to the theoretical basis and practical performance of minimum transmitting power control using this algorithm while the approach to perform one dimension search in terms of the requirements of power control is investigated. Finally, the practical performance of this controller is simulated via computer. The simulation results have shown that the proposed DFP power control algorithm achieves a higher average SIR, lower average deviation of SIR, of individual signal received by base stations, and smaller fraction of users who fail to converge to within 10% of target SIR. This better controller performance would lead to smaller outage probability and substantial capacity improvements.