【摘要】 提出了一种CDMA系统中改进的自适应功率控制算法.新算法基于信噪比测量,采用卡尔曼滤波器估计信道衰落,采用记忆单元记录功率控制调整指令历史,并综合利用两方面的信息来决定下一次的功率调整步长.该算法在一定程度上可以有效克服信道中深度衰落和快衰落带来的影响,并改善CDMA系统的性能.更多还原

【Abstract】 An improved adaptive power control algorithm in code division multiple access(CDMA) systems is presented.The proposed algorithm is based on SIR-measurement method.The step-size of variable power is decided according to both channel fading characteristics estimated by a Kalman filter and the previous power control instructions recorded by a memory unit.The simulation results demonstrate that the proposed algorithm will be able to overcome the fast and deep fading and improve the performance of CDMA systems.更多还原