一种反向功率控制算法的优化仿真  

Simulation on Optimization of Reverse Power Control Algorithm

作　　者：宋敬江[1] 易小杰[1] 朱颖莉[1] 

机构地区：[1]江西科技师范大学通信电子学院,江西南昌330013

出　　处：《计算机仿真》2014年第6期217-220,共4页Computer Simulation

摘　　要：研究大区制码分多址(CDMA)移动通信中反向功率优化控制问题,传统的反向功率控制模型在处理信道衰落时,假设用户信号通过长距离传递后,功率损失服从对数正态分布,引起操作时功率损失,导致系统稳定性较差,超调严重,上升时间较长。提出一种变步长随机多径信道控制的反向闭环功率控制算法,采用动态变步长方法扩大功率调整的步长,避免信道出现大幅度衰落,通过多径衰落的信道随机模型分析通信信道衰减的动态性和用户的随机性,准确调整发射台的发射功率,增强反向功率控制精度和系统容量。仿真结果表明,该种方法具有较强的响应效率,较小的超调量和定位误差,是一种有效的信道优化控制算法。Reverse power optimization control problems of the regional code division multiple access （CDMA） mobile communication was studied. A reverse closed loop power control algorithm was presented in this paper based on variable step and random muhipath channel control. Using dynamic variable step method, we expanded the power adjustment step to avoid drastic channel fading. Through the channel random model of multipath fading, the dynamic of communication channels fading and user＇s randomness can be analyzed to adjust the transmit power of the transmitting station and enhance the accuracy of reverse power control and system capacity. The simulation results show that this method has stronger response efficiency, and smaller overshoot and positioning error. It is an effective algorithm of channel optimization control.

关 键 词：反向功率控制 变步长 随机多径信道控制 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]