Robust Beamforming With Partial Channel State Information for Energy Efficient Networks
Robust Beamforming With Partial Channel State Information for Energy Efficient Networks
复制标题
具有部分信道状态信息的鲁棒波束成形,用于节能网络
DOI:
10.1109/jsac.2015.2478720
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发表时间:
2015-09
影响因子:
16.4
通讯作者:
You Xiaohu
中科院分区:
文献类型:
--
作者:
Xu Wei;Cui Yuke;Zhang Hua;Li Geoffrey Ye;You Xiaohu
In this paper, we investigate robust beamforming to improve the energy efficiency (EE) of wireless networks when only imperfect or partial channel state information (CSI) is available at the transmitter. Due to CSI quantization errors and/or limited feedback information, CSI imperfections can be well modeled by a bounded uncertainty region. We focus on the worst case robust beamforming strategy to optimize the EE of downlink transmission under the deterministic bounded channel model, which merely assumes a maximal channel error magnitude. We start with a single-user single-cell MIMO system and obtain a closed-form design for robust beamforming. For a multicell network, robust beamforming is in a nonconvex fractional form, and the solution cannot be directly extended from the single-cell scenario. To solve this problem efficiently, we resort to a lower bound, instead of the primal problem, and cast it as a semidefinite program (SDP). The robustness and efficiency of the proposed beamforming design are confirmed by computer simulation results.
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影响因子:
5.4
作者:
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通讯作者:
Z. Luo;T. Davidson;G. Giannakis;K. M. Wong
DOI:
10.1007/1-4020-2721-4_1
发表时间:
2011-04
期刊:
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影响因子:
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发表时间:
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期刊:
IEEE Communications Letters
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作者:
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影响因子:
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作者:
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