【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 ,而且可以使用户的功率辐射最小更多还原

【Abstract】 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.更多还原