摘要
在CDMA系统中,利用多用户检测中的干扰抑制效果可以降低对功率控制的要求。本文提出了一种新的基于代价函数的联合功率控制算法。在该算法中,除了需要对功率向量进行迭代更新以外,还要对接收机滤波器的抽头系数不断迭代更新。实验结果表明,采用本文提出的功率控制算法,在系统内用户发射总功率一定的条件下,可以使各用户获得更高的信干比服务质量,系统容量也具有进一步提高的潜力。
In CDMA system, the effect of interference suppression resulted from multiuser detection can be used to reduce the request on power control. A new joint power control algorithm based on cost function is proposed in this paper. In the new algorithm, both the power vectors and filter coefficients are needed to be iterated and updated. Tests show that on condition that the total transmitted power in the CDMA system is given, users can obtain a higher SIR and the capacity of the system can be also improved with the proposed algorithm.
出处
《通信学报》
EI
CSCD
北大核心
2003年第6期75-80,共6页
Journal on Communications
基金
安徽省自然科学基金资助项目(99043124)
关键词
功率控制
多用户接收机
代价函数
处理增益
信干比
最小均方误差
power control
multiuser receiver
cost function
processing gain
signal to interference ratio
minimum mean squared error
