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首页> 外文期刊>IEEE Transactions on Communications >Joint optimal power control and beamforming in wireless networks using antenna arrays
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Joint optimal power control and beamforming in wireless networks using antenna arrays

机译：使用天线阵列的无线网络中的联合最佳功率控制和波束成形

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摘要

The interference reduction capability of antenna arrays and the power control algorithms have been considered separately as means to increase the capacity in wireless communication networks. The minimum variance distortionless response beamformer maximizes the signal-to-interference-and-noise ratio (SINR) when it is employed in the receiver of a wireless link. In a system with omnidirectional antennas, power control algorithms are used to maximize the SINR as well. We consider a system with beamforming capabilities in the receiver, and power control. An iterative algorithm is proposed to jointly update the transmission powers and the beamformer weights so that it converges to the jointly optimal beamforming and transmission power vector. The algorithm is distributed and uses only local interference measurements. In an uplink transmission scenario, it is shown how base assignment can be incorporated in addition to beamforming and power control, such that a globally optimum solution is obtained. The network capacity and the saving in mobile power are evaluated through numerical study.
机译：天线阵列的降低干扰的能力和功率控制算法已被单独考虑为增加无线通信网络容量的手段。最小方差无失真响应波束形成器在无线链路的接收器中采用时，可使信噪比（SINR）最大化。在具有全向天线的系统中，功率控制算法也用于最大化SINR。我们考虑一个在接收器中具有波束成形功能和功率控制的系统。提出了一种迭代算法来共同更新发射功率和波束成形器权重，使其收敛到共同最优的波束成形和发射功率矢量。该算法是分布式的，仅使用本地干扰测量。在上行链路传输情形中，示出了除了波束成形和功率控制之外还可以如何合并基本分配，从而获得全局最优解决方案。通过数值研究来评估网络容量和节省的移动电源。

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