摘要
对CDMA系统功率进行控制的最根本目的是增加系统容量。以及CDMA系统的干扰及功率与系统容量之间关系,以及移动通信信道(特别是快衰落)对功率控制产生的负面影响,利用Matlab对CDMA系统功率控制算法进行了性能上的仿真。仿真得到慢衰落和快衰落的模拟环境,CDMA系统容量受限于用户间的相互干扰,由反向链路上固定步长功率控制分配算法条件下接收信号的功率的统计图可知,仿真结果与理论分析高度吻合。固定步长功率控制方法的系统稳定性差,且有很大过调量和稳定时间。因此可通过:提高功率测量速度、提高控制量的精调程度两种方法提高控制精度。
Controlling CDMA system power in order to increase the system capacity. Interference of CDMA and relationship between power and capacity, negative impact for power control produced by mobile comunication channel are anolysed. The performance simulation for CDMA system power control algorithm by Matlab. The simulated environment of slow fading and fast fading is gained. CDMA system capacity is subject to the mutual interference between users,the reverse link on a fixed - step power control algorithm for distribution under the condition of receiving the signal power of the charts, results of the simulation and theoretical analysis are the same. The fixed - step power control system stability is not good and has a great time to tune. As a result,the two methods can improve the precision of control. The first is to increase the speed of power measurement,and the other is to increase the amount of control over the degree of fine - tuning.
出处
《现代电子技术》
2009年第17期30-32,36,共4页
Modern Electronics Technique
