MIMO Beamforming Designs With Partial CSI Under Energy Harvesting Constraints

MIMO Beamforming Designs With Partial CSI Under Energy Harvesting Constraints
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能量收集约束下采用部分 CSI 的 MIMO 波束成形设计

DOI:
10.1109/lsp.2013.2247999
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发表时间:
2013-02
影响因子:
3.9
通讯作者:
Kuang, Jingming
Kuang, Jingming
中科院分区:
工程技术2区
文献类型:
--
作者:
Xing, Chengwen;Wang, Niwei;Ni, Jiqing;Fei, Zesong;Kuang, Jingming

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在这封信中,我们研究多输入多输出(MIMO)通信下的能量收集(EH)的约束。在我们考虑的EH系统中,有一个信息发送(ITx)节点,一个传统的信息接收(IRx)节点和多个EH节点。EH节点可以将接收到的电磁波转换为能量,延长网络的运行寿命。当ITx节点向目的地发送信号时,它还应该优化波束成形/预编码器矩阵以同时有效地对EH节点进行充电。此外,充电能量应大于预定义阈值。在EH约束下,在我们的工作中,最小均方误差(MMSE)和互信息作为性能指标的波束成形设计在ITx节点。为了使所提出的算法适用于实际实现,并具有负担得起的开销,我们的工作集中在部分CSI的波束成形设计,这是我们的工作的独特贡献。最后,数值结果显示所提出的算法的性能优势。
In this letter, we investigate multiple-input multiple-output (MIMO) communications under energy harvesting (EH) constraints. In our considered EH system, there is one information transmitting (ITx) node, one traditional information receiving (IRx) node and multiple EH nodes. EH nodes can transform the received electromagnetic waves into energy to enlarge the network operation life. When the ITx node sends signals to the destination, it should also optimize the beamforming/precoder matrix to charge the EH nodes efficiently simultaneously. Additionally, the charged energy should be larger than a predefined threshold. Under the EH constraints, in our work both minimum mean-square-error (MMSE) and mutual information are taken as the performance metrics for the beamforming designs at the ITx node. In order to make the proposed algorithms suitable for practical implementation and have affordable overhead, our work focuses on the beamforming designs with partial CSI and this is the distinct contribution of our work. Finally, numerical results are given to show the performance advantages of the proposed algorithms.
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