一种下行波束赋形与功率控制联合优化的新算法  

A New Algorithm for Joint Optimization of Power Control and Downlink Beam-forming

作　　者：唐旭辉[1] 刘婧歆[1] 蒋泽[1] 

机构地区：[1]重庆邮电学院,重庆400065

出　　处：《重庆邮电学院学报（自然科学版）》2003年第1期67-71,共5页Journal of Chongqing University of Posts and Telecommunications(Natural Sciences Edition)

摘　　要：在无线蜂窝系统中 ,当采用下行波束赋形技术时 ,所有用户所接收到的信号必须满足给定的信噪干扰比。由于信噪干扰比的大小与天线的辐射方向图有关 ,故平常所用的技术 (如空间相关矩阵特征值分解技术 )都必须再加以额外的功率控制。提出了一种新的下行波束赋形与功率控制的联合优化算法 ,这种算法不但能够调整权系数以使所有用户具有相同的信噪干扰比 。When the downlink beam forming is applied in the wireless cellular network, the signals received by all mobile users must reach the provided signal to interference plus noise ratio. Because the SINR depends on the orientation of the antenna weighting vector, the ratio determines the shape of the radiation pattern. Therefore, the conventional techniques, such as the technique based on eigenvalue decomposition of the spatial covariance matrix, require additional power adjustment. In this paper, a new algorithm for power adjustment is proposed, which not only adjusts the beam forming weights in order that all users have the same SINR, but also limits the maximum radiated power for users.

关 键 词：下行波束赋形 智能天线 功率控制 信噪干扰比 无线蜂窝系统 联合优化算法 

分 类 号：TN929.5[电子电信—通信与信息系统]