Transmit beamforming and power control for cellular wireless systems
Transmit beamforming and power control for cellular wireless systems
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DOI：
10.1109/49.730452
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发表时间：
1998-10-01
影响因子：
16.4
通讯作者：
Tassiulas, L
中科院分区：
文献类型：
--
作者：
Rashid-Farrokhi, F;Liu, KJR;Tassiulas, L
联合功率控制和波束形成方案，提出了蜂窝系统中，自适应阵列只使用在基站。在上行链路中，联合计算基站处的移动的功率和接收机分集组合向量。移动的发射功率被最小化，而在每个链路的信号干扰噪声比（SINR）保持在阈值以上，还提出了一种用于下行链路的发射分集方案，其中发射权重向量和下行链路功率分配被联合计算，使得在每个移动的的SINR高于目标值。该算法实现了一个可行的解决方案，如果有一个下行链路，并最大限度地减少了网络中的总发射功率。在互易网络中，它可以在分散式系统中实现，并且它不需要全局信道响应测量。在非互易网络中，当上下行信道响应不同时，所提出的发射波束形成算法需要在集中式系统中实现，并且需要知道下行信道响应。通过数值研究，将这些算法的性能与以前提出的算法进行了比较。
Joint power control and beamforming schemes are proposed for cellular systems where adaptive arrays are used only at base stations. In the uplink, mobile powers and receiver diversity combining vectors at base stations are calculated jointly. The mobile transmitted power is minimized, while the signal-to-interference-and-noise ratio (SINR) at each link is maintained above a threshold, A transmit diversity scheme for the downlink is also proposed where the transmit weight vectors and downlink power allocations are jointly calculated such that the SINR at each mobile is above a target value. The proposed algorithm achieves a feasible solution for the downlink if there is one and minimizes the total transmitted power in the network. In a reciprocal network it can be implemented in a decentralized system, and it does not require global channel response measurements. In a nonreciprocal network, where the uplink and downlink channel responses are different, the proposed transmit beamforming algorithm needs to be implemented in a centralized system, and it requires the knowledge of the downlink channel responses, The performances of these algorithms are compared with previously proposed algorithms through numerical studies.