摘要
针对宽带码分多址系统的上行链路 ,提出了一种基于干扰预测的功率控制方法 .利用当前时刻和以前若干时刻的干扰对下一时刻的干扰进行最佳预测 ,以此为基础来解决下一时刻的功率 ,从而使信干比更接近门限值 .仿真结果证明 ,该方法不仅可以提高控制精度和收敛速度 ,增加系统的稳定性 ,而且可以减小条件中断概率 ,增加系统的容量 .
For the uplink transmission in a wideband code division multiple access (WCDMA) systems, a predictive power control algorithm is presented. Using the optimal linear prediction, the interference to the desired user for the future instant is estimated from current and past interference. The result is then used to derive the optimum power levels of the mobile transmitters in the system. It makes the signal-to-interference ratio (SIR) more close to its minimum required level. Simulation results show that the algorithm can yield not only higher control precision, fast convergence speed, and better system stability, but also lower drop-off probability and increase system capacity compared to existing schemes.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2001年第6期577-580,共4页
Journal of Xi'an Jiaotong University
基金
国家自然科学基金资助项目 (6 0 0 72 0 40 )
西安交通大学重点资助培植项目 (PZ0 0 7)
关键词
功率控制
宽带码分多址
最佳估计
算法
干扰预测
Closed loop control systems
Code division multiple access
Forecasting
Interference suppression
Power control
Spread spectrum communication
