摘要
针对CDMA系统通信链路,提出了一种适合于反向链路闭环功率控制的方法,基本思想是根据模糊理论,对内环功率控制建立一套模糊规则,进行可变步长的调整,并通过分段模糊控制来提高控制精度,使之能够在复杂的衰落环境中作出灵敏的反应。通过与传统算法的比较,该算法可以提高内环的控制精度,减小发射功率,中断概率平均减小62%,有效地缓解过冲、上升时间长等问题,从而减小系统干扰,增加系统稳定性和系统容量,且复杂度低,易于实现。
Focusing on the communication link of CDMA system,this paper introduces a new application of fuzzy logic control theory to the closed-loop power control which can be adapted to the change of reverse link.Based on the fuzzy control theory,the method constructs a series of fuzzy rules and provides sensitive response for the different communication environments. Compared with the conventional approaches,this method enhances the control accuracy and reduces ultimately the transmit power,reduces the outage probability with fixed-step control by up to 62%,lessens the rise time,minimizes the overshoot and root-mean-square tracking error,improves the system stability and increases the system capacity with the advantage of easy implementation.
出处
《重庆邮电学院学报（自然科学版）》
2004年第3期30-34,共5页
Journal of Chongqing University of Posts and Telecommunications(Natural Sciences Edition)
