基于天线阵列的联合功率控制技术  

Joint Power Control and Multi-user Detection based on Antenna Array

作　　者：杨鑫[1] 段吉海[1] 朱晓[1] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《火力与指挥控制》2009年第8期68-70,共3页Fire Control & Command Control

基　　金：广西科学基金资助项目(桂科基0575096)

摘　　要：功率控制和多用户检测是CDMA移动通信系统中克服远近效应、抑制多址干扰(MAI)的两项关键技术。通过分析PLC-LSCMA多用户检测算法,提出了一种基于天线阵列的联合多用户检测的CDMA功率控制算法。在此算法中,对接收机滤波器抽头系数进行迭代更新的同时,也对功率向量进行迭代更新。仿真结果表明,在发射总功率和信噪比(SNR)一定时,用户可获得更高的信干比,同时用户的发射功率比传统算法明显降低,提高了系统容量。Power control and multi-user detection interference （MAI） and near-far effect. A joint power are two ways to cope with multiple access control and multi-user detection algorithm is proposed using antenna array in CDMA system by analyzing PLC-LSCMA multi-user detection algorithm in this paper. In this algorithm, both the power vectors and filter coefficients are renovated iteratively. The Simulation results show that when the total transmission power and SNR are definite, users can obtain a higher SIR, at the same time, the users＇ transmission power is reduced distinctly compared to the traditional algorithm and the capacity of the system is also improved.

关 键 词：CDMA 功率控制 多用户检测 天线阵列 PLC—LSCMA 

分 类 号：TN92[电子电信—通信与信息系统]